Forem: eInfochips

Ensuring Message Order in Distributed Systems: Addressing Pub/Sub Ordering Key Limitations with Subscriber-side Sorting

eInfochips — Thu, 27 Nov 2025 12:40:22 +0000

Executive Summary

In event-driven and distributed architectures, preserving the order of messages is critical for maintaining state consistency, processing accuracy, and system reliability. Google Cloud Pub/Sub offers ordering keys to ensure that messages with the same key are delivered in the order they were published. However, this feature does not always ensure in-order delivery at the subscriber level, which is particularly critical for platforms where sequence integrity is vital (e.g., financial systems, event sequencing). This paper outlines the causes behind unordered message reception of Google Pub/Sub despite the use of ordering keys and outlines a practical solution involving subscriber-side message sorting to enforce the expected message sequence.

Overview

Google Cloud Pub/Sub is a widely adopted messaging service designed for scalable, asynchronous communication. In a use case where the sequence of events is essential, Pub/Sub provides support for ordering keys, a mechanism intended to preserve the order of messages that share the same key.

While ordering keys are conceptually straightforward, their behaviour in real-world, distributed systems can be unpredictable for message delivery. Applications often report receiving messages out of order at the subscriber end.

Problem Statement and Root Causes

Problem Statement

Despite enabling ordering keys in Google Cloud Pub/Sub, intended to ensure that messages with the same key are delivered in the exact sequence they were published, the real-world implementations frequently show that subscribers still receive messages in a non-deterministic, out-of-order fashion.

Root Causes

-Subscriber Concurrency and Load Balancing
Even with a single ordering key, if multiple threads are consuming messages, race conditions can cause out-of-order processing.
-Message Redelivery After Failures
When a message delivery is not acknowledged on time due to network issues, the Pub/Sub may redeliver it, potentially after newer messages have already been processed.
-Autoscaling and Stateless Subscriptions
Auto-scaled or stateless subscriber deployments cannot guarantee that messages from the same ordering key are handled by the same worker.
-Latency in Distributed Systems
Cross-region deployments and transient network issues can induce delivery delays that disrupt the message sequence.

Use Cases of Google Pub/Sub

1. Music Playlist: Real-time data streaming and analytics, enabling features like personalized recommendations and playlist updates

2. App Notification: Leverages for real-time notifications and event processing, ensuring seamless communication between users

3. Booking: Event-driven architecture, handling booking updates, notifications, and real-time data synchronization

4. Retail and E-commerce: Inventory management, order processing, and real-time customer notifications

5. Financial Services: Transaction processing, and real-time alerts

6. Gaming Platforms: Multiplayer gaming for real-time game state updates and player interactions

Solution: External Sorting at the Subscriber Level

To mitigate these challenges, we have implemented external ordering mechanisms at the subscriber level. This strategy involves sorting using Ordering key and Session ID for each session which is effective without the prior knowledge of the quantity of data with each session.

Key Components of External Sorting

Generating a Custom Ordering Key on the Publisher’s End
Custom ordering keys are generated at the publisher’s end for each message which will be beneficial to arrange data in specific order at subscriber’s end.

Generating Session ID for each session
To effectively bifurcate messages of different sessions which also help on the subscriber’s end to sort messages without prior knowledge of the number of messages sent by the publisher.

Benefits of Subscriber-side Sorting

Trade-offs and Considerations

While subscriber-side sorting restores order, it also introduces:

Latency: Small delays are introduced for message buffering.

Memory Overhead: Additional memory is required to buffer and sort messages.

Complexity: Requires careful handling of duplicate messages.

Conclusion

Google Cloud Pub/Sub’s ordering keys provide a valuable foundation for sequencing messages, but they do not guarantee ordered delivery in all conditions. For systems where strict message order is non-negotiable, subscriber-side message sorting is a practical and proven solution. By enriching messages with ordering key and session id and implementing intelligent buffering at the consumer end, developers can ensure consistency, correctness, and reliability in distributed processing pipelines.

Appendix: Environment Setup, Test Data and Sample Output

Environment Setup

Prerequisites

Create a Google Cloud account
Generate a private key
Set up topics in Pub/Sub
Create subscriptions for the topics

Steps to follow post the creation of the account and private key

Download and install the Google Cloud SDK using the following link: Google Cloud SDK Installation Guide.
Open the Command Prompt (CMD) and run the command: gcloud init.
Sign in by selecting your account and completing the login process.

Prerequisites before running the publisher and subscriber code:

Set up a virtual environment.
Install the required library by executing: pip install google-cloud-pubsub.
Place the private key file (key.json) in the repository directory.

Test Data

Below is the test data showcasing the results before and after implementing the solution. The comparison highlights the key metrics and their respective changes over time.

Data Sent by Publisher

1st Session: 3349

2nd Session: 9942

Data received at the subscriber end with no implementation of proposed solution

Explanation: All the messages are received on subscriber end in an unordered manner of messages as well as session id.

Data sorted by implementing proposed solution at the subscriber end

1st Session: 3349

2nd Session: 9942

Sample Output

Two workflows with different message counts will be published. Each message signifies a key event, and the sequence of these events plays a vital role. Both workflows are being published by the same source.

Below are the different communication types:

One-to-one Communication:

1. In one-to-one communication, a message is sent from a single publisher to a single subscriber.
2. This is more like a direct messaging system, where the message is intended for a specific recipient.

Publisher End

Message published for the first session with an ordering key.

Message published for the second session with an ordering key.

Output of Subscriber

One-to-Many Communication

A single publisher sends messages to multiple subscribers.
Subscribers receive messages based on their subscription to specific topics.
Efficient broadcasting of information to multiple endpoints without requiring direct connections between the publisher and subscribers

Publisher End
Message published for the first session with an ordering key.

Message published for the second session with an ordering key.

Output of Subscriber

Message received for the first subscriber.

Message received by the second subscriber

Authors:

1. Jigar Solanki
Jigar Solanki serves as an Engineer at eInfochips, where he significantly contributes to QA Automation, Development and DevOps initiatives. With over 4 years of dedicated experience at eInfochips, Jigar has developed strong proficiency in delivering innovative, high-quality engineering solutions. He holds a Bachelor of Technology degree in Computer Science and Engineering from Parul University, Vadodara.

2. Arvind Mukati
Arvind Mukati serves as a Senior Engineer (Level 1) at eInfochips, where he plays a pivotal role in QA automation and DevOps initiatives. With over 4 years of dedicated experience at eInfochips, Arvind has cultivated a strong proficiency in delivering innovative and high-quality solutions. He holds a Master of Computer Applications degree from the Acropolis Institute of Technology and Research, Indore.

3. Mansi Thakkar
Mansi Thakkar serves as an Engineer at eInfochips, actively contributing to QA automation, Development and DevOps initiatives. With over 3 years of experience at eInfochips, Mansi has honed her expertise in delivering high-quality solutions. She holds a Master of Computer Applications (MCA) degree from LJ University, Ahmedabad.

Comprehensive Design Approach for Pan-Tilt-Zoom (PTZ) Cameras

eInfochips — Fri, 14 Nov 2025 09:19:29 +0000

Abstract

The Pan-Tilt-Zoom (PTZ) camera is a sophisticated device that has numerous applications, including security and surveillance. This paper provides a comprehensive design method for PTZ cameras, addressing the key aspects such as mechanical design, optical systems, control mechanisms, and software integration. The primary objective is to achieve high-quality imaging, extensive coverage, reliability, user control, and seamless system integration. To learn more about our end-to-end camera design and product engineering services, visit eInfochips’ Camera Design Solutions.

Abbreviations

PTZ: Pan-Tilt-Zoom
FoV: Field of View
GUI: Graphical User Interface
IP: Ingress Protection
ONVIF: Open Network Video Interface Forum
RTSP: Real-Time Streaming Protocol
CMOS: Complementary Metal-Oxide-Semiconductor

Introduction

Pan-tilt zoom (PTZ) cameras are advanced monitoring equipment that provide versatility in recording high-resolution videos over a wide area. PTZ cameras can pan, tilt, and zoom and are suitable for most applications such as security, traffic monitoring, and wildlife-watching. This paper introduces an overall design strategy for PTZ cameras, including the important aspects, such as mechanical design, optical systems, control mechanisms, and software integration.

Design Objectives

Essential Features of the Cellular IoT Camera

1. 4G LTE Connectivity: Critical for remote supervision where access is limited and the Wi-Fi power is insufficient.

- Motion Detection: Alerts with real-time photo alerts and allows for live or recorded videos viewing via a camera management program on smartphones, tablets, or laptops.
- Outdoor Durability: Waterproof construction is compliant IP-66 and survives a 2-meter fall without any functional damage.

- Temperature Recovery Ability: Operational even at temperatures ranging from -4° to 140° Fahrenheit (-20°C at 60°C).
- Flexible Mounting Options: Equipped with a tripod, a mounting strap, or a Python lock.
- External Port: Equipped with an external port for attaching devices such as an external flash or RF transceiver.
- Internal Storage: Includes internal disk storage and an optional SD card slot, with protection against the use of incompatible SD cards.

- Rechargeable Battery: A Lithium-ion rechargeable battery with 2 to 3 months of regular use duration is provided. It can be charged on-the-go via solar panels or an external battery pack.
- Flash LED IR: Flash LED infrared is used with a minimum light range of sixty feet and the flash models can change.
- Motion Sensors: A single sensor with a 20-meter range and three smaller sensors on the three sides with a 10-meter range are used.
- Customizable Camera Case: Cases are surveillance and outdoor hunting-specific, with customizable color patterns and options such as a universal camera mounting slot, python lock holes, and strap thread holes.
- LED Indicator: The front cover has an LED indicator or screen for showing camera status, with an optional display screen for setup.

Omni-directional Antenna: A built-in option is preferred to prevent damage, with an external antenna connector for better signal reception.

Mechanical Design

Pan-Tilt Mechanism
Pan Mechanism: To set it up, a motor, pulley, and belt are used to let the camera pan. A stepper motor makes sure the movement stays smooth. This motor links to a worm and worm-wheel gearbox, which keeps the mechanism from moving the wrong way and boosts the motor's holding power making its detent torque stronger. The pan mechanism uses a pulley and belt system to mount this motor. The pulley is metal, while the belt is made of Kevlar. This prevents the change in belt tension due to the inextensibility of Kevlar. This is necessary to ensure a tilt time of 4 seconds consistently. The pan mechanism consists of a rotative hub that is mounted into the stationary hub with a built-in shaft and bearing. It is kept steady with the help of an inheritance device that is also combined with assembly for the control pulley.

Tilt Mechanism: With the pulley and belt engine setup, the camera achieves its tilted movement like a pan mechanism. The difference in this case is that employed is the use of a spur gearbox motor as compared to the use of a worm and worm-wheel gearbox motor within the pan mechanism. This is achieved with the aim of conserving space.

Another reason is that the retaining torque needed to keep the mechanism in position is not as much as is needed in keeping a worm and worm-wheel arrangement in position. To consistently achieve the 4-second tilting time, this is especially important. The pan mechanism consists of the rotating hub mounted into the fixed hub with a built-in shaft and bearing. This is guaranteed by the help of a reservoir also acting as a council for the controlled pulley.

Zoom Mechanism

Optical Zoom: Uses a lens system with different focal lengths. The lens must be optimized to reduce optical distortion and preserve image quality across the zoom range.
Digital Zoom: Involves digital cropping and image enlargement. This technique is less preferred than optical zoom because of the loss of image quality.

Enclosure Design

The enclosure was designed with the simple goal of keeping all the parts inside the camera and making sure it functions properly. The enclosure is composed of five parts, all of which have been discussed in detail later in the research paper. Let us now discuss the purpose of the enclosure design.

The team carried out a straightforward proof of concept to check out how well the enclosure could tilt and pan, how efficient its mechanisms were, how stable it was when mounted, and how long each function took. This POC, once tested, was subsequently employed to make an ID (Industrial Design) that was designed with considerations like functionality, aspects, and target market in mind.

The enclosure design is divided into the following parts:

Camera Module: The camera module consists of a camera sensor, a camera PCB, and camera mounting. The enclosure is made of aluminum and has an IP rating. Shafts on both sides of the enclosure are designed to be installed in the camera hub module using bearings.
Camera Hub Module: The camera hub module consists of two main components, the camera hub that contains an internal fixed arm and a removable arm. The arms are meant to act as a casing for the bearings and the bearing retainers in a way that the camera hub shafts are installed into the same. One arm can be removed to make the camera hub fitment more useful. Additionally, the camera hub serves as a driver-board PCB and a tilt-motor mounting device. These combination components make up the camera module assembly. It also includes a gasket for an IP rating of the enclosure. This assembly rotates inside the pan hub assembly.
Pan Hub Assembly: The pan hub assembly consists of two key components: a fixed hub and a rotating hub. The rotating hub is where one finds both the pan assembly mechanism and the pan motor neatly housed together. The fixed and rotating hub assembly are both mounted with a hub, a bearing, and a bearing-retainer through the fixed hub's integrated shaft. This whole pan assembly is mounted on the PIR Module using the mounting bosses on the top surface.
PIR Module Assembly: The PIR module is made up of two principal components, the PIR module and the top cover and PIR sensor assemblies. This assembly has four PIR sensors positioned around its edge to detect motion. These sensors are covered by a black translucent Fresnel lens which is mounted to a lens holder using adhesive.
Mounting Bracket Assembly: The mounting bracket assembly is made up of battery casing, bracket casing, and camera hinge. The battery casing is the name given to the cover of the detachable battery. The camera hinge and battery casing are joined by the bracket casing. Additionally, it must route the necessary wires and make sure there is some room between the main camera body and the camera mount. The hinge of the camera is mounted on the casing of the bracket and is used as a mounting and quick release system for the main camera body.

Optical System

Lens Selection

Field of View (FoV): It is important to take into account the coverage of the lens when selecting a lens. Although they offer greater coverage, wide-angle lenses may cause edge distortion.
Aperture Size: Usage of larger apertures is preferred for improved low-light performance, but it could make the lens larger and more expensive.

Sensor Selection

Resolution: Higher resolution sensors, such as 4K or 8K, provide clearer images.
Low-Light Performance: Sensors with higher sensitivity, like back-illuminated CMOS sensors, perform better in low-light environments.

Control Mechanisms

*Mechanical Control *

Servo Motors: High-precision servo motors control pan, tilt, and zoom functions, ensuring smooth and accurate operation.
Feedback Systems: Implement feedback systems, such as encoders, for precise control and positioning.

*Electronic Control *

Control Interface: Provide various control methods, including manual, remote, and automated options. Interfaces may include joysticks, web-based applications, or third-party software integration.
**Communication Protocols: **Compatibility with standard protocols, such as ONVIF, RTSP, or proprietary APIs, for seamless system integration is vital.

Software Integration

*8.1 Firmware Development *

The firmware should be optimized for performance and stability, handling control commands, image processing, and system communication.
Updates to the firmware are needed regularly to enhance functionality and address security vulnerabilities.

8.2 User Interface

An intuitive Graphical User Interface (GUI) should be provided to enable easy configuration of camera settings, PTZ controls, and access to live or recorded footage.
Compatibility with mobile devices should be ensured to facilitate remote access and control.

Testing and Validation

Performance Testing

Image quality must be tested for resolution, color accuracy, and distortion over the range of zoom.

It is necessary to test the precision and fluidity of the pan, tilt, and zoom functions.

Durability testing must be performed to test performance in different environmental conditions, including elevated temperatures, humidity, and exposure to the elements.

User Feedback

To improve the control scheme and interface, usability testing should be done.

Prototypes should be released into the real world for field testing to assess overall performance and obtain information for enhancement.

Conclusion

Designing a PTZ camera involves inputs from many different fields, including programming, electronics, mechanical engineering, and optics. High-quality imaging, robust performance, and usability are key considerations. Ongoing testing and optimization are required to guarantee efficient real-world function.

Author(s) Bio:
Harsh Chaudhary
Harsh Chaudhary is a Mechanical Design Engineer at eInfochips, with two years of experience in CAD modeling, product development, and designing IP-rated Internet of Things devices, including PTZ cameras and machine vision. His innovative effort has been patented and recognized with awards such as the AP-Expo and IIT Kharagpur's Indian Student Space Challenge award. Harsh is now pursuing a master’s degree in design engineering. He graduated with a B. Tech in Mechanical Engineering from ABES Engineering College. He is known for his technical competence, critical thinking, and enthusiasm for engineering innovation.

Abhiraj Kasana:
Abhiraj Kasana is a Mechanical Engineer with experience spanning more than a decade in product development, mechanical design, and manufacturing systems. He has been instrumental in the introduction of more than ten successful products in a variety of sectors, including consumer electronics, industrial automation, and medical devices. Skilled in applications including SolidWorks and Autodesk Inventor, Abhiraj has expertise in rapid prototyping and Design for Manufacturing (DFM). Some of his accomplishments are obtaining patents and achieving awards such as the Most Innovative Project Award in AP-Expo and achievement at IIT Kharagpur's Indian Student Space Challenge. Abhiraj has also worked with MIT on new projects like the COVID Detection System and the Automated Disease Sample Collector. Having a bachelor’s degree in mechanical engineering from ABES Engineering College, he is committed to pushing engineering solutions with an emphasis on efficiency, reliability, and sustainability.

Lovkesh Singh:
Lovkesh Singh is a Mechanical Design Engineer with 14 years of experience in new product introduction, product sustenance engineering, and product development. He has experience in medical devices, home appliances, IoT solutions, and farm equipment. He has experience in CAD tools like Creo, SolidWorks, and NX. Lovkesh also possesses strong knowledge of international standards such as ISO 13485 and ISO 14971.
In his career, he has spearheaded cross-functional teams, cost-reduction activities, and has overseen intricate electromechanical product designs from concept through production. He is known for his technical prowess and leadership and has a Bachelor of Science in Mechanical Engineering. Lovkesh believes in furthering user-centered, dependable design engineering solutions.

Functional Safety (ISO 26262): Beliefs vs. Facts

eInfochips — Tue, 16 Sep 2025 10:13:02 +0000

Functional Safety before ISO 26262

While car technology has been developing for over one hundred years, ISO 26262 is a safety standard that was introduced only in the last decade. Safety features existed even before the publication of ISO 26262. However, there was no unified standard to address the complex interactions between software, electronics, and vehicle control systems.

Automotive systems have consistently included safety mechanisms, even long before formal safety standards were introduced. Multiple safety features existed, like braking systems, Electronic Stability Control, Traction control systems, airbags, seat belts, etc.

Here are a few safety standards that were used before ISO 26262 was introduced:

• IEC 61508: This was the general functional safety standard previously used, but not automotive-specific.

• Federal Motor Vehicle Safety and Regulatory Standards (FMVSS): This standard aimed to minimize traffic-related accidents and improve overall vehicle safety for all road users, including drivers, passengers, and pedestrians.

• IIHS (Insurance Institute for Highway Safety): This was an independent nonprofit organization, and the standard was supported by auto insurers. It aimed to reduce vehicle crashes, injuries, and fatalities by performing comprehensive safety research and testing.

Let us consider a few examples of safety mechanisms which existed in the past.

The dual brake systems, are an example of hardware redundancy—a safety mechanism designed to ensure that if one brake failed, the backup system would still function. Another example is the use of dual wheel speed sensors in ABS systems, which provided sensor redundancy to maintain functionality even if one sensor failed.

Multiple OEMs used self-check mechanisms, such as a test in the instrument cluster that turned on all tell-tale signs at ignition startups to ensure their correct operation. Memory self-tests were designed to identify random hardware errors, guaranteeing that the stored data remained intact over the product’s lifetime.
The ECC (Error-Correcting Code) mechanism was used in RAM to detect and correct memory faults, ensuring data integrity.

Vehicle communication utilized timeout monitoring, where CAN messages were observed to verify the accuracy of data transfer between ECUs.

Internal or external watchdogs were used as mechanisms to detect and recover from software-hangs, hardware peripheral faults, or CPU errors. There is no shortage of many similar examples.

The impact of ISO 26262

The standard has become the universal translator for everyone in the automotive electronics world. Now, everyone from OEMs to chip vendors, is finally speaking the same language, thanks to this standard.

In the earlier automotive systems, safety features were typically integrated in a straightforward, ad-hoc manner. With the introduction of ISO 26262, these aspects are now formalized using a structured framework. Safety is broken down into clearly defined elements such as safety goals, Functional Safety Requirements (FSR), safety measures, and other related concepts. This standardization ensures a systematic approach to managing the complexity of modern automotive systems.

ISO 26262 enables engineers to identify safety goals that may not have been previously classified as safety relevant. It supports the evaluation of whether the applied safety measures are appropriate, lacking, or excessive for the given risk level. The standard guides, which methods are mandatory, optional, or not needed for each ASIL level. It also helps determine the percentage of diagnostic coverage offered by different safety mechanisms.
Thus, it helps engineers select appropriate fault detection and mitigation strategies during system development.

Functional Safety-Mere Paperwork or More?

A common mindset is to finish the implementation first, then contact a certification agency to manage the paperwork and get certified.

However, Functional Safety is not just a checkbox at the end, it is a discipline. It ensures that safety is systematically planned, implemented, and maintained throughout the entire product life cycle.

The 2018 version of ISO 26262 reflects this approach. It consists of twelve parts, each outlining specific processes and requirements, resulting in several distinct work products necessary for compliance.

Let us take a closer look.
The ISO 26262 official website:
<credits: https://www.iso.org/standard/68383.html

ISO26262 FUSA Work Products
PART 1 Vocabulary

Work product details can be found in the official ISO PDFs; however, these are licensed documents that must be purchased.

PART 2 Management of Functional Safety
PART 3 Concept Phase

PART 4 Product Development at the System Level

PART 5 Product Development at the Hardware Level

PART 6 Product Development at the Software Level

PART 7 Production and Operation Service and Decommissioning

PART 8 Supporting Processes

PART 9 Automotive Safety Integrity Level (ASIL)-oriented and safety-oriented analysis

PART 10 Guidelines on ISO 26262
PART 11 Guidelines on application of ISO 26262 to semiconductors

PART 12 Adaptation of ISO 26262 for motorcycles

The Need for Multiple Work Products

• Modern cars are packed with electronics: automatic braking, lane keeping, parking assistance, cruise control, anti-lock braking systems (ABS), Advanced Driver Assistance Systems (ADAS), and even self-driving features. These systems rely heavily on electronics and software, making functional safety and system reliability more critical than ever.

• ISO 26262 provides methodologies on how to design safety. Thoroughly described and documented work products provide the necessary evidence to demonstrate that the system is adequately safe and compliant with the OEM’s ASIL requirements.

• These work products establish a standardized approach to safety. Without this structured framework, safety practices would be inconsistent, unreliable, and harder to validate.

• It introduced risk-based development through Automotive Safety Integrity Levels (ASIL), covering failure prevention, system design, hardware, and software development, verification, and validation, as well as production and maintenance.

• These work products serve as evidence that the OEM and supplier expectations are met. Moreover, ISO 26262 provides documentation of due diligence, helping to protect against liability.

Deadlines! For Every Project, Time is Always Tight!
It is a prevalent opinion that Functional Safety slows down development yet avoiding it leads to non-compliance. Trying to cut corners on required processes just to meet deadlines might help one ship faster, but it can compromise safety seriously.
Let us look at how tight deadlines can impact safety.

Skipping things like hazard analysis, dependent failure analysis, or safety reviews might save time in the present, but they can cause costly fixes later. Getting safety involved too late and discovering issues at the end is painful. People often jump to quick fixes without enough analysis or proper brainstorming. Superficially fixing safety issues may leave other violations hidden and unresolved. If tool qualification is ignored, verification results might not even count.

Best Practices for Tight Deadlines

• Start the functional safety activities right at the project kickoff. The earlier you catch risks, the less the rework later.

• Employ specialists who know ISO 26262 inside-out. A specialist who knows thoroughly how to keep safety-critical systems simpler and free from interference by non-safety functions is an asset to the process.

• Use pre-certified hardware and software modules, safety libraries, and proven safety architectures whenever possible.

• One of the biggest challenges for safety engineers is to design systems that are simple yet technically independent. Focus on designing simpler systems.

• Invest in automated tools for static analysis, model checking, and test coverage to enhance reliability and efficiency.

• Team-up safety engineers with developers from day one. Cross-functional collaboration helps prevent late-stage surprises.

• Avoid making individual decisions under pressure. Instead, hold a brainstorming session with the team to generate multiple solutions and then select the best one.

• Develop your safety case progressively throughout the development process.

• Qualify your development and verification tools early; otherwise, use pre-qualified tools.

• Keep documentation clear, concise, and traceable.
A Synopsis

Consider a scenario where your car radio stops working, it is not a big deal, it would just be a quiet drive. However, if your brakes stop responding because of a software bug, that is quite a different story—a dangerous one!

Remember! Safety is not an option, it is essential.

Every team should have a proactive approach towards Functional Safety. It is important to understand that the standard only expects compliance with the specified requirements, never asking for more than is necessary. It offers straightforward guidance about which methods or processes must, may, or need not be applied depending on the ASIL level.

It also guides one on how to identify potential failures, to design systems to reduce those risks, to test everything and what to do if a system does fail despite all this. Hence, proper analysis and diligent documentation ensure the required compliance with the ASIL.

You can find Functional Safety (FuSa) expertise and simplified explanations of key concepts on the website below.
https://www.functionalsafetyfirst.com/p/about.html

Author Bio & Picture:

Suneja Walavalkar is a Technical Lead at Einfochips, specializing in Functional Safety. She holds a TÜV SÜD Functional Safety Certification (Level 1) and a B.Tech in Electronics and Telecommunication Engineering. Prior to joining Einfochips, she has worked with Lear Automotive India. Leveraging her technology domain and experience, she is now focusing on Functional Safety projects in terms of system, software, and hardware domains.

Unit Testing in Zephyr RTOS Projects with Ceedling: A Developer’s Guide

eInfochips — Fri, 01 Aug 2025 13:07:37 +0000

Introduction

This whitepaper investigates the use of Ceedling frameworks by developers for Zephyr Project unit testing. It also discusses typical problems that developers run into and offers fixes.

What is Unit Testing?

Unit testing allows us to test and confirm that each module is operating and performing as intended. This facilitates the debugging process and helps identify problems early in the development phase.

The complexity and hardware dependencies of embedded systems, like those created with the Zephyr Project, make unit testing even more important.

This is a typical flowchart that shows how unit testing is done.

Advantages of Unit Testing

Early bug detection: Identifying and addressing issues early on helps developers lower the expense and work needed in subsequent stages.
Testing without hardware: Validation and testing individual components is possible without relying on the hardware.
Improved code quality: Identifying issues/bugs early helps improve code quality.
Reduced rework time: Another advantage of unit testing is that it reduces code rework time. Hence, it reduces the overall code implementation time.
Reduces bug receive count from field: Finding as many bugs as possible at the time of development and fixing them with unit testing, improves the code quality and reduces the chances of the bugs being received from the field.

Unit Testing in the Zephyr Project

Zephyr is a real-time operating system, and it is open source. Zephyr provides the ZTest framework for unit testing.

However, in certain cases where the unit test infrastructure is built on Ceedling and the same needs to be continued for a Zephyr-based project also, this document provides guidance on some of the challenges that one might be face during the unit test implementation with Ceedling and Zephyr.

Additionally, developers often face challenges when trying to mock specific files, handle device tree contents, or simulate hardware-dependent features. This document provides solutions to these challenges using Ceedling, a popular unit testing framework. For more embedded system solutions, visit https://www.einfochips.com/

Ceedling Unit Test Framework

Overview

Ceedling is an easy to use and also widely deployed unit testing framework implemented specifically for C projects. Below are the tools integrated with Ceedling :

Unity: It is a lightweight unit testing framework for C and useful for writing and running test cases.
CMock: It is a mocking framework that can be used to create/generate mock functions.
Test Reporting: It provides detailed test reports, including pass/fail results, code coverage reports, and error messages, to help developers identify and fix issues efficiently.

Ceedling is useful for embedded systems development, where testing is critical due to hardware dependency.

Key Features

The build and test process are automated, and they use a single command to build and run the unit test cases.
It provides a mocking functionality.
It supports embedded projects.

Advantages of Ceedling

It integrates Unity and CMock that simplifies the testing process. This enables automated builds and test execution. Using a single command run, all the test cases are built and run, and output reports are generated.
It provides a mocking capability that allows one to test code without other dependencies and create the same behavior by mocking it.
Unit tests generate detailed test reports and code coverage analysis, assisting developers in pinpointing untested code paths effectively. They also identify the function, line, and branch coverage using generated HTML reports.
It is easy to use and widely used for the C program

How to Use Ceedling?

Install Ceedling unit test framework using this command: gem install ceedling Ref. https://www.throwtheswitch.org/ceedling
Create a new Ceedling project using this command: ceedling new
Use this command to run tests cases: ceedling test:all

Common Challenges and Solutions in Unit Testing using Ceedling in Zephyr

Developers might face some challenges when writing unit test cases using Ceedling in the Zephyr project. Here are some common challenges and their solutions.

Mocking specific files without including or adding the entire zephyr framework

Challenge:
Including the entire Zephyr framework for unit testing causes the following issues:

Increases the project size
Increases the compilation time, and
Introduces unnecessary dependencies that are generated at runtime

This makes the unit testing process more complex and inefficient.

Solution:
Instead of including all the Zephyr code, one needs to include or add only the required header files in project.yml file as given below:

:paths: 
  :include: 
    - <zephyr_path_where_file_exist>

For example, if  kernel.h is required for testing, include a directory path where it exists and add it into the project.yml.

Include the below mock file in the test file.

#include <Mockkernel.h>

This will generate a mock file for kernel.h and allow testing without including the entire Zephyr framework.

Mocking Static Inline Functions

Challenge:
Static inline functions are replaced at the time of compilation and become part of the source file itself. As a result, CMock cannot generate mock functions for them.

Solution:
To mock static inline functions:

Create a new header file in another custom directory to differentiate between the Zephyr header file and its directory structure.
Include this custom directory in the project.yml file instead of the original Zephyr header file directory.
Copy the function declaration and its dependencies into the custom header file.
Remove the static inline keyword from the function definition.
Include the custom header file in the test file and mock it.
Example:

#include <Mockheader.h>

Creating Dummy Device Nodes from .dts or overlay files

Challenge:
Some device configurations, such as NVS partitions, file system partitions, or GPIO nodes, are used in the source file and need to be mocked for testing.

Solution:
Mock these configurations in the flash_map.h file as follows:

#define FIXED_PARTITION_DEVICE(partition) (void *)0 // Mock definition

Mocking Log Print Statements

Challenge:
Zephyr provides logging functions below which need to be mocked for unit testing.

- LOG_ERR, 
- LOG_DBG,  
- LOG_WRN, and  
- LOG_INF

Solution:

Create a log.h file in a custom directory, maintaining the same Zephyr directory structure (e.g., /zephyr/logging/log.h).

Replace the Zephyr log functions with custom macros:

#define LOG_ERR(...) log_err() 
#define LOG_DBG(...) log_dbg() 
#define LOG_INF(...) log_inf() 
#define LOG_WRN(...) log_wrn()

Mock the log.h file in the test file:

#include <Mocklog.h>

CMock will generate mock functions for the log functions:

void log_dbg(void);
void log_inf(void);
void log_wrn(void);
void log_err(void);

Mocking Functions Registered via SYS_INIT

Challenge:
The SYS_INIT macro registers initialization functions that are executed during system initialization. These functions need to be mocked for testing.

Solution:

Create an init.h file in a custom directory, maintaining the same Zephyr directory structure (e.g., /zephyr/init.h).

Replace the SYS_INIT macro with a custom implementation:

#define SYS_INIT(init_fn, level, prio) \ 
    int custom_sys_init_fn(void) { \ 
        int ret = init_fn(); \ 
        return ret; \

#include <Mockinit.h>

Add the custom directory path to project.yml.

Ensure the mock header file is included in the test file to facilitate mocking and simulate dependencies effectively.

Use the custom_sys_init_fn in the test file to execute the function registered via SYS_INIT.

Including Some of Zephyr Header Files as Empty File Solely for Compilation

Challenge:
Some Zephyr header files are required for compilation but are not available during unit testing, resulting in errors like fatal error, file or directory not present.

Solution:

Create empty versions of the required header files in a custom directory.
Maintain the same Zephyr directory structure.
Add the custom directory path to project.yml.

This will resolve the compilation issues.

Mocking Zephyr POSIX Header Files

Challenge:
Zephyr POSIX header files may conflict with host machine POSIX header files (e.g., timer.h).

Solution:

Create a new file with the same name as the Zephyr header file, prefixed with an underscore (e.g., _posix_timer.h).
Add only the required API declarations to this file.

Use this custom file for mocking.

Handling the devicetree_generated.h

Challenge:
The devicetree_generated.h file is created automatically during the build process and is generated at runtime. It is essential for unit testing but is not available by default.

Solution:

Copy the devicetree_generated.h file from the source build folder to the test-include folder.
Add the test-include folder path to project.yml.
This ensures the file is available during unit testing.

By addressing these challenges with the solutions provided, developers can effectively use Ceedling to write and execute unit tests for Zephyr projects, ensuring better code quality and maintainability.

Zephyr-Ceedling Integration Example Project

To illustrate the above points, we will walk through a step-by-step example using sample code. In this demonstration, we will download Zephyr and Ceedling, and modify the hello_world sample program provided by Zephyr.

Install Zephyr and Ceedling

1. Create a Project Directory

Create a folder named Unit_Test_Example_Project and download both Ceedling and Zephyr into this directory.

2. Set Up Zephyr

Download Zephyr SDK and install the required dependencies. Follow the official Zephyr documentation for setup:
Zephyr Getting Started Guide:

3. Install Ceedling

Install Ceedling using the following command: gem install ceedling
Refer to the official Ceedling documentation for more details:
Ceedling Installation Guide

Note: This example uses Ceedling version 0.31.1.

Example Project Directory Structure

After setting up and modifying the Zephyr hello_world sample project, the directory structure will look as follows:

. 
├── CMakeLists.txt 
├── prj.conf 
├── project.yml 
├── rakefile.rb 
├── src 
│   ├── main.c 
│   └── main.h 
└── test 
    ├── include 
    │   └── zephyr 
    │       ├── kernel.h 
    │       ├── init.h 
    │       ├── devicetree_generated.h 
    │       ├── device.h 
    │       ├── logging 
    │       │   └── log.h 
    │       ├── posix 
    │       │   └── timer.h 
    │       ├── storage 
    │       │   └── flash_map.h 
    └── test_main.c

Steps to Modify the ‘hello_world’ Sample Project

1. Add Missing Directories and Files

Update the Zephyr  hello_world sample project by adding the directories and files shown in the directory structure above. These files and directories are not part of the original project and need to be created manually.

2. Know the Role of Each File and Folder

Before proceeding, ensure familiarity with the role of each file and folder in the project. This will help in organizing the project and writing the required source code.

3. Provide Source Code for Each File

Once the structure is in place, we provide the source code for each file in the subsequent steps.

Following these steps, one can set up a unit testing environment for the Zephyr hello_world project using Ceedling.

Directory Structure Overview

This is a Zephyr-based project that has been modified to include Ceedling for unit testing. The directory structure is organized to maintain compatibility with Zephyr's conventions while also supporting the Ceedling unit testing framework.

Top-Level Files

Source Code Directory (src)

Test Directory (test)

All the unit test related files are part of this directory. This includes the test cases, mock headers, and any additional files required for testing.

Mock Header Files in test/include

The ‘test/include’ directory contains mock or stub versions of Zephyr headers. These files are used to isolate the code under test from the actual Zephyr implementation, allowing for unit testing in a controlled environment.

Key Points

Zephyr Compatibility:

The directory structure and file organization are designed to maintain compatibility with Zephyr's build system and conventions.
The devicetree_generated.h file and other Zephyr headers are included to ensure that the test environment matches the actual application environment.

Ceedling Integration:

The test directory and project.yml file are specific to Ceedling and are used to configure and execute unit tests.

Mock headers are used to isolate the code under test from Zephyr dependencies.

Unit Test Focus:

The test_main.c file contains the actual unit test cases, which focus on testing the functions in main.c.
Mock headers simulate the behavior of Zephyr APIs, allowing the tests to run independently of the Zephyr kernel.

Conclusion

This directory structure is a modification of Zephyr’s ‘hello_world’ sample application to explain Ceedling unit testing framework in Zephyr. It allows developers to write and execute unit tests for Zephyr applications while maintaining compatibility with Zephyr's build system. The use of mock headers and the inclusion of devicetree_generated.h ensure that the test environment closely resembles the actual application environment.

CMakeLists.txt

# SPDX-License-Identifier: Apache-2.0 
cmake_minimum_required(VERSION 3.20.0) 
find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE}) 
project(Ceedling_Zephyr_Demo) 
target_sources(app PRIVATE src/main.c)

prj.conf

CONFIG_LOG=y 
CONFIG_LOG_DEFAULT_LEVEL=4 
CONFIG_FLASH=y 
CONFIG_FLASH_MAP=y 
CONFIG_POSIX_API=y 
CONFIG_NEWLIB_LIBC=y

Project.yml

--- 
:project: 
  :use_test_preprocessor: TRUE 
  :build_root: build 
  :test_file_prefix: test_ 
  :which_ceedling: gem 
  :ceedling_version: 0.31.1 
  :default_tasks: 
    - test:all 
:paths: 
  :test: 
    - +:test/** 
  :source: 
    - src/** 
  :include: 
    - src 
    - test/include 
    - ../../../zephyr/include 
    - ../../../zephyr/include/zephyr/fs 
:defines: 
  :common: &common_defines 
    - TEST 
  :test: 
    - *common_defines 
  :test_preprocess: 
    - *common_defines 
:cmock: 
  :mock_prefix: Mock 
  :enforce_strict_ordering: TRUE 
  :plugins: 
    -: ignore 
    - :callback 
:gcov: 
  :reports: 
    - HtmlDetailed 
:plugins: 
  :enabled: 
    - gcov 
...

rakefile.rb

require "ceedling" 
Ceedling.load_project 
task :default => %w[test:all]

src/main.c

/** 
 * @file    main.c 
 * 
 * @brief   This file contains function implementations to demonstrate challenges with Ceedling and Zephyr, 
 *          and provides solutions in unit testing code. 
 * 
 * @author  Meetkumar Bariya 
 * 
 * @date    2025-06-15 
 * 
 */ 

#include "main.h" 
#include <zephyr/device.h> 
#include <zephyr/init.h> 
#include <zephyr/kernel.h> 
#include <zephyr/logging/log.h> 
#include <zephyr/storage/flash_map.h> 
#include <sys/types.h> 
#include <stdbool.h> 
#include <time.h> 

LOG_MODULE_REGISTER(main); 

#define STORAGE_PARTITION   storage_partition 

#define STORAGE_DEVICE      FIXED_PARTITION_DEVICE(STORAGE_PARTITION) 

#define STORAGE_OFFSET      FIXED_PARTITION_OFFSET(STORAGE_PARTITION) 

static int initialize_system(void); 
/** 
 * @brief System initializes at boot-up time. 
 * 
 * @return int Return up-time. 
 */ 
static int initialize_system(void) 
{ 
    LOG_INF("System initialization started."); 
    k_sleep(K_SECONDS(1)); //  Point 2: Example of static inline function. 
    int up_time = k_uptime_get(); // Point 2: Example of static inline function. 
    LOG_INF("System initialization completed successfully."); 
    return up_time; 
} 

/** 
 * @brief Demonstrates the use of POSIX time functions. 
 */ 
struct timespec demonstrate_posix_time(void) 
{ 
    struct timespec current_time = {0, 0}; 
    if (clock_gettime(CLOCK_REALTIME, &current_time) == 0) {  // Point 7: POSIX function 
        LOG_INF("Current time retrieved successfully: %lld seconds, %ld nanoseconds.", 
                current_time.tv_sec, current_time.tv_nsec); 
    } 

    return current_time; // Return the current time 
} 

/** 
 * @brief Check flash device ready or not. 
 */ 
void verify_flash_device(void) 
{ 
    if (!device_is_ready(STORAGE_DEVICE)) { 
        LOG_ERR("flash device has been not ready. Please check the configuration."); 
        return; 
    } 
    LOG_INF("Flash storage device is ready for use."); 
} 

/* Register the system initialization function to run during application startup. */ 

SYS_INIT(initialize_system, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY); // Point 5: SYS_INIT

src/main.h

/** 
 * @file    main.h 
 * 
 * @brief   This file includes the function prototypes of main.c file. 
 * 
 * @author  Meetkumar Bariya 
 * 
 * @date    2025-06-15 
 * 
 */ 

#ifndef MAIN_H 
#define MAIN_H 

/** 
 * @brief This function was created to demonstrate POSIX APIs. 
 * 
 * This function retrieves the current system time using POSIX-compliant 
 * 
 * `clock_gettime` and logs the result. It is useful for validating time-related 
 * 
 * functionality in the system. 
 * 
 * Returns the current time. 
 */ 
struct timespec demonstrate_posix_time(void); 

/** 
 * @brief Verifies the readiness of the flash storage device. 
 * 
 * This function checks whether the flash storage device is ready for use. 
 * If the device is not ready, an error message is logged. Otherwise, a success 
 * 
 * message is logged to indicate that the device is operational. 
 */ 
void verify_flash_device(void); 

#endif /* MAIN_H */

test_main.c

/** 
 * @file    test_main.c 
 * 
 * @brief   Unit test file for `main.c`, demonstrating the use of Ceedling with mocked dependencies. 
 *          This file contains tests for system initialization, flash device verification, and POSIX time functionality. 
 * 
 *          The tests validate the behavior of the functions in `main.c` by mocking external dependencies 
 *          such as logging, device readiness checks, kernel functions(static inline), and POSIX time functions. 
 * 
 * @author  Meetkumar Bariya 
 * 
 * @date    2025-06-15 
 * 
 * @details This test file uses the Unity framework and Ceedling to perform unit testing. Mocked dependencies 
 *          are used to isolate the functions under test and ensure their correctness in various scenarios. 
 * 
 *         The below features are included: 
 *          - System initialization (`initialize_system`): Validates logging, kernel sleep time, kernel uptime and return value. 
 *          - Flash device verification (`verify_flash_device`): Ensures readiness checks and logging behavior. 
 *          - POSIX time demonstration (`demonstrate_posix_time`): Validates time retrieval and logging behavior. 
 * 
 *          Mocked dependencies: 
 *          - `Mockdevice.h`: Mocks device readiness checks. 
 *          - `Mockkernel.h`: Mocks kernel functions like `k_sleep` and `k_uptime_get`. 
 *          - `Mocklog.h`: Mocks logging functions. 
 *          - `Mocktimer.h`: Mocks POSIX time functions like `clock_gettime`. 
 */ 

#include "unity.h" 
#include "main.h" 
#include "Mockdevice.h" // Mocking device readiness checks 
#include "Mockkernel.h" // Mocking kernel functions like k_sleep and k_uptime_get 
#include "Mocklog.h"    // Mocking logging functions 
#include "Mocktimer.h"  // Mocking POSIX time functions 
#include <stdbool.h> 
#include <stddef.h> 
#include <sys/types.h> 

extern bool custom_sys_init_fn(void); 

void setUp(void) 
{ 
    // Initialize any required resources before each test 
} 

void tearDown(void) 
{ 
    // Clean up work can be added here. 
} 

/** 
 * @brief Stub function for `clock_gettime` used in unit testing. 
 * 
 * Simulates the behavior of `clock_gettime` by validating the clock ID and setting mock time values. 
 * 
 * @param[in]  clk_id         Expected to be `CLOCK_REALTIME`. 
 * @param[out] tp             Pointer to a `timespec` structure to store mock time values. 
 * @param[in]  cmock_num_calls Number of times the stub has been called. 
 * 
 * @return int Returns `0` to indicate success. 
 */ 
static int clock_gettime_stub(clockid_t clk_id, struct timespec *tp, int cmock_num_calls) 
{ 
    // Validate that the clock ID is CLOCK_REALTIME 
    TEST_ASSERT_EQUAL(CLOCK_REALTIME, clk_id); 

    // Set the mock values 
    tp->tv_sec = 12345; 
    tp->tv_nsec = 67890; 

    return 0; 
} 

/** 
 * @brief Test the system initialization function. 
 * 
 * This test function is to validate the SYS_INIT function: 
 * - Logs the appropriate messages. 
 * - Calls the `k_sleep` and `k_uptime_get` functions. 
 * - Returns the expected success value. 
 */ 
void test_initialize_system(void) 
{ 
    // Expect the mock log function for the "System initialization started" log print 
    log_inf_Expect(); 

    // Mock the static inline function 
    k_sleep_ExpectAndReturn(K_SECONDS(1), 0); // Expect k_sleep to return 0 

    int64_t expected_up_time  = 10; // Mocked up-time value 

    k_uptime_get_ExpectAndReturn(expected_up_time); // Mock the k_uptime_get function to return a fixed value 

    // Expect the mock log function for the "System initialization completed successfully" log print 

    log_inf_Expect(); 

    // Simulate the SYS_INIT behavior and call the function to test ('initialize_system') 

    int64_t result = custom_sys_init_fn(); 

    TEST_ASSERT_EQUAL(expected_up_time, result); 
} 

/** 
 * @brief This function is to test the flash device. 
 * 
 * This test validates that the `verify_flash_device` function: 
 * - Checks the readiness of the flash device. 
 * - Logs appropriate messages based on the device's readiness. 
 */ 
void test_verify_flash_device_function(void) 
{ 
    // (1) Success case: Device is ready 
    // Mock the device_is_ready function 
    device_is_ready_ExpectAndReturn(NULL, true); 

    log_inf_Expect(); 

    // Call the function that needs to test 
    verify_flash_device(); 

    // (2) Failure case: Device is not ready 
    // Mock the device_is_ready function 
    device_is_ready_ExpectAndReturn(NULL, false); 

    log_err_Expect(); 

    verify_flash_device(); 
} 

/** 
 * @brief Test the POSIX time demonstration function. 
 * 
 * This test validates that the ‘demonstrate_posix_time’ function: 
 * 
 */ 
void test_demonstrate_posix_time(void) 
{ 
    // Stub the clock_gettime function 
    clock_gettime_StubWithCallback(clock_gettime_stub); 

    log_inf_Expect(); 
    struct timespec expected_time = { .tv_sec = 12345, .tv_nsec = 67890 }; 
    struct timespec actual_time = demonstrate_posix_time(); 

    // Validate the seconds and nanoseconds 
    TEST_ASSERT_EQUAL(expected_time.tv_sec, actual_time.tv_sec); 
    TEST_ASSERT_EQUAL(expected_time.tv_nsec, actual_time.tv_nsec); 
}

device.h

#ifndef CUSTOM_DEVICE_H 
#define CUSTOM_DEVICE_H 

#include <stdbool.h> 

bool device_is_ready(const void *dev); 

#endif /* CUSTOM_DEVICE_H */

devicetree_generated.h

Copy the content from ‘Unit_Test_Example_Project/zephyrproject/zephyr/samples/hello_world/build/zephyr/include/generated/zephyr/devicetree_generated.h’.

Note: If this file is not present, then build the source code using the command below, so that it is generated.

west build -b esp32c3_devkitm -p

init.h

#ifndef CUSTOM_INIT_H 
#define CUSTOM_INIT_H 

#define SYS_INIT(init_fn, level, prio) \ 
    int custom_sys_init_fn (void) { \ 
        int ret = init_fn(); \ 
        return ret; \ 
    } 

#endif /* CUSTOM_INIT_H */

Kernel.h

#ifndef CUSTOM_KERNEL_H 
#define CUSTOM_KERNEL_H 
#include <stdint.h> 

typedef int64_t k_ticks_t; 

typedef struct { 
    k_ticks_t ticks; 
} k_timeout_t; 

#define K_SECONDS (sec) ((k_timeout_t) { .ticks = (sec * 1000) }) 

int32_t k_sleep(k_timeout_t timeout); 

int64_t k_uptime_get(void); 

#endif // CUSTOM_KERNEL_H

log.h

#ifndef CUSTOM_LOG_H 
#define CUSTOM_LOG_H 

#define LOG_MODULE_REGISTER(name) 

void log_dbg(void); 
void log_inf(void); 
void log_wrn(void); 
void log_err(void); 

#define LOG_ERR(...) log_err() 
#define LOG_DBG(...) log_dbg() 
#define LOG_INF(...) log_inf() 
#define LOG_WRN(...) log_wrn() 

#endif /* CUSTOM_LOG_H */

timer.h

#ifndef CUSTOM_TIMER_H 
#define CUSTOM_TIMER_H 

#include <time.h> 

#define CLOCK_REALTIME 0 // Mock value for CLOCK_REALTIME 

int clock_gettime(int clock_id, struct timespec *tp); 

#endif /* CUSTOM_TIMER_H */

flash_map.h

#ifndef CUSTOM_STORAGE_FLASH_MAP_H 
#define CUSTOM_STORAGE_FLASH_MAP_H 

#define FIXED_PARTITION_DEVICE(partition) (void *)0 // Mock definition 

#endif // CUSTOM_STORAGE_FLASH_MAP_H

Build Commands

west build -b <board_name> -p 
i.e. west build -b esp32c3_devkitm -p

To build and run test code,

ceedling gcov:all utils:gcov --clobber

Coverage Reports
Generated coverage report will be generated at ‘samples/hello_world/build/artifacts/gcov/ GcovCoverageResults.html’ location.

About The Author

Meetkumar Bariya is a Senior Software Engineer with 10 years of experience in embedded systems and real-time operating systems. He is currently working at eInfochips. Meetkumar has a bachelor's degree in Electronics and Communication Engineering from Ganpat University, and an MBA degree in IT Management from Symbiosis college, Pune.

3D Printing: Process and Material Selection

eInfochips — Mon, 09 Jun 2025 07:18:46 +0000

*Abstract *

3D printing creates objects by adding material, subcaste by subcaste to a digital model. It is used as a prototyping process to understand the form, factor, finish, fittings, and aesthetics of the final product. As technology is developing and evolving day by day, the variety of 3D printing processes can create confusion when selecting the appropriate prototyping process and material.

This method explores various types of 3D printing and the crucial factors for material selection, based on insights from ongoing work at eInfochips.

*1.Introduction *

Manufacturing processes can be categorized into several types. Forming changes the dimensions of a material by applying force. Casting is the process of heating a solid material until it liquefies and then pouring it into a mold to achieve the desired shape. Lastly, additive manufacturing is a process in which objects are constructed by sequentially adding layers of material.

Its primary goal is to minimize process time and steps, often achieved through rapid prototyping.

Additive manufacturing uses solid modeling data to form layers with thin cross-sections, allowing the production of intricate shapes and surfaces that are difficult to achieve through traditional methods. The design is created in Computer-Aided Design (CAD) software, and 3D printers process it layer-by-layer. Once the CAD models are complete, they are converted into printer-compatible file formats like OBJ, STL, 3MF, or AMF. Engineering teams like those at eInfochips specialize in supporting these early-stage design and modeling processes with end-to-end product engineering capabilities.

3D printing is considered a future technology due to its sustainable advantages, such as reduced material waste, minimal post-processing, and lower costs, even when manufacturing complex parts. Additionally, 3D printing has the potential to recycle plastics, reduce emissions, and reuse materials. It also enables the creation of parts with complex and optimized geometries, resulting in lightweight components with improved strength-to-weight ratios. As a result, 3D printing contributes to the development of more sustainable designs.

3D printing technology is currently evolving. Though 3D printing has lot of advantages over conventional manufacturing processes, there are some drawbacks to this technology. It is time-consuming, and it needs a lot of capital investment. At present the industry majorly uses 3D printing as a prototyping process, as it provides parts within tolerance and with a good surface finish.

*1.1 3D Printing Process: *

Fig 1. 3D Printing Process

*1.2 Types *

3D printing relies on three primary methods: sintering, where the material's temperature is increased without melting to create high-resolution prototypes; melting, which uses electron beams to melt powders; and stereolithography, which employs photopolymerization using an ultraviolet laser.

*2. Stereolithography (SLA) *

It is an additive manufacturing process in which liquid polymer (Resin) is solidified or cured layer by layer with the help of a UV screen or a UV laser. The UV laser travels in the shape of a sliced layer. SLA provides superior dimensional accuracy and fine surface resolution compared to many other additive manufacturing methods.

*2.1 SLA 3D Printing Process *

*Fig 2.1. SLA 3D Printing Process *

*2.2 Applications *

Prototyping in automotive, aerospace, and consumer goods industries
Jewelry making
Dental models
Architectural models for visualization and presentation
Art and sculpture techniques are employed to produce complex and intricately detailed works

*2.3 Advantages *

High accuracy and resolution
Capability to create complex and detailed components
Variety of materials

*2.4 Disadvantages *

Slower printing speed compared to some other processes
Achieving the intended surface texture may require post-processing to clean off the unwanted resin left after printing
Limited in terms of scalability for large volume production

*3. Fused deposition modelling (FDM) *

In FDM, a heated nozzle extrudes molten thermoplastic filament in successive layers to construct a 3D part. Cooling causes the extruded material to solidify, incrementally constructing the final part.

3.1 FDM 3D Printing Process

*Fig.3.1 FDM 3D Printing Process *

*3.2 Multi color 3D Printing *

Multi-color Fused Deposition Modeling (FDM) is a technique that allows users to create objects with multiple colors or materials in a single print.

FDM printers employ a single extrusion nozzle capable of depositing one material at a time. In multi-nozzle or multi-color setups, there are multiple nozzles (two or more) attached to the 3D printer's print head. Each nozzle is connected to a separate filament spool, and each filament can be a distinct color or material. Later, the software users assign these materials or colors to the required area for the model.

After slicing, the data file is provided to the 3D printer to initiate printing. This data file contains instructions for the printer to change the nozzle according to the material or color. Other than the nozzle setup, the printing process remains consistent with conventional single-nozzle FDM techniques. Multi-color printing has wide applications in prototyping and in the toy industry.

Multi-material FDM is used where more finished products are required, where one primary nozzle is made of the intended material for the object and one nozzle has the water-soluble filament. This water-soluble (PVA - Polyvinyl Alcohol) filament is used only to print supports. When the object is printed, it is dipped in water and the supports dissolve in water, and we get the finished product.

3.3 Flexible 3D Printing

Flexible filaments can be used as a substitute for standard filaments in the FDM process. This material is usually made from Thermoplastic Polyurethane or Thermoplastic Elastomer.

Printing an object with a flexible material can be tricky as it may require a printer with a direct drive extruder where the feeder motor is at the spool end and not near the printing head, to prevent stretching of the filament which may future cause printing defects. There are a lot of control parameters in flexible printing, and it is critical to maintain proper flexibility of the object. This makes the printing process slower than the usual FDM process.

For seals, grips, or shoe soles where high flexibility is required, the filament material with Shore 85A or lower is used. For gaskets and parts which need some flexibility without being too soft, the filament material with Shore 85A to 95A is used. For applications where there is structural integrity requirement with some flexibility, filament material with Shore 95A or higher is used.

*3.4 Applications *

Rapid prototyping for product development and testing
Educational models and prototypes for tutoring 
Manufacturing low-cost and custom parts for various industries

*3.5 Advantages *

Cost-effective
Broad spectrum of materials
Simple and user-friendly operation

*3.6 Disadvantages *

Lower accuracy and resolution compared to some other methods
Limited in terms of surface finish compared to processes like SLA and SLS
Layer adhesion issues may occur, affecting a part of the strength

*4. Selective laser sintering (SLS) *

The process is known for its capability to produce strong and functional products with intricate shapes, making it a popular choice for prototyping and producing end-use components. A laser of CO2 or nitrogen is employed to solidify the layers, with selection based on the face-end type and powder specifications. During this system, a chemical powder is employed for producing the object.

Various powders can be utilized, including plastics, metal, silica, etc. When a metal powder is used, this system is known as Direct Metal Laser Sintering .

*4.1 SLS 3D Printing Process *

Fig 4.1 SLS 3D Printing Process

*4.2 Applications *

Prototypes are designed for functional testing and validation processes
Automotive and aerospace
Customized products such as orthotics and prosthetics
Manufacturing complex geometries and parts with high-strength requirements

*4.3 Advantages *

Ability to produce functional parts with high accuracy and good surface finish
Wide material range: plastics and metals
Does not require the support structures

*4.4 Disadvantages *

Higher equipment and material costs compared to some of the other processes
Post-processing may be required

*5. Multi jet fusion (MJF) *

MJF 3D printing is renowned for its ability to produce high-quality, functional parts with fine detail and smooth surfaces, making it a popular choice for both prototyping and end-use production. The solidification of layers is achieved through the precise application of fusing and detailing agents followed by the application of heat. This method primarily uses polyamide (nylon) powders but can also employ other thermoplastic materials.

The MJF process uses an inkjet array to deposit fusing agents onto the powder bed, precisely following the data of the 3D model. A detailing agent is also applied to improve resolution and surface finish. Infrared lamps pass over the built-up area, causing the areas with the fusing agent to solidify and fuse together.

Typically, thermoplastics powder is used. However, other materials like elastomers and composites can also be used depending on the application requirements.

*5.1 MJF 3D Printing Process *

Fig 5.1 MJF 3D Printing Process

*5.2 Applications *

Functional prototypes for product development
End-use parts for various industries including automotive, consumer goods, and electronics
Rapid manufacturing complex geometries
Customized consumer products

*5.3 Advantages *

Fast printing
Good accuracy and surface finish
Versatility in materials, including thermoplastics, with different properties

*5.4 Disadvantages *

Limited in terms of part-size compared to some other processes
Material handling and post-processing cleanup may be challenging
Higher initial investment

6. Binder jetting (BJ)

Binder jetting is known for its speed and capability to produce large, complex components economically. It is used for producing beach moulds and cores for metal. In binder jetting, a print head deposits a binding agent onto a powder bed, replacing the UV-curing process found in other methods with a mechanical bonding approach. Ceramic and metallic powders typically undergo post-processing steps such as thermal treatment and sintering prior to functional use. Most of the plastic and metal materials are usable directly out of the printer, with minimal or no need for post-processing.

*6.1 BJ 3D Printing Process *

*Fig.6.1 BJ 3D Printing Process *

*6.2 Applications *

Producing sand casting moulds for metal casting
Creating metal, sand, and ceramic parts for various industries
Rapid prototyping of complex geometries is essential
Tooling and fixtures for manufacturing processes

*6.3 Advantages *

Quick production process
Versatility in materials
Scalable for large volume production

*6.4 Disadvantages *

Limited in terms of accuracy compared to other processes
Not a good surface finish
Material properties may vary depending on the type of binder used

*7.Direct energy deposition (DED) *

Direct Energy Deposition is a 3D printing technique used for a wide range of applications, including rapid prototyping, repair of existing parts, and the creation of complex, high-performance components. It can restore or refurbish previously manufactured parts. DED styles make it easier to produce products by melting material when they are deposited. Directed Energy Deposition systems utilize a deposition head, which incorporates the energy delivery mechanism along with two powder feeding nozzles for material deposition. Metal powder or metal filament can be used as raw materials.

*7.1 DED 3D Printing Process *

Fig.7.1 DED 3D Printing Process

*7.2 Applications *

Ideal for restoring or enhancing existing components across the aerospace, automotive, and manufacturing industries
Aerospace turbine engine parts
Rapid prototyping of metal parts with good accuracy

*7.3 Advantages *

Good accuracy for metal parts
Suitable for restoring and rebuilding existing components
Intricate parts

*7.4 Disadvantages *

Expensive process compared to some other additive manufacturing methods
Limited material options compared to other processes
Post-processing may be required for achieving the desired surface finish

*8. Laminated object manufacturing (LOM) *

LOM 3D printing is known for its ability to create large and strong parts in less time. It is often used for prototyping, architectural models, and creating patterns for casting and molding processes. The process initiates with a sheet affixed to a base substrate via a heated roller. A laser or mechanical cutter is employed to define the geometry, and successive layers are similarly laminated and trimmed with high precision. Following the completion of each layer, the platform increases incrementally. A new sheet of metal is then fed into position, after which the platform returns to its build height for the subsequent layer of deposition.

8.1 LOM 3D Printing Process

Fig.8.1 LOM 3D Printing Process

*8.2 Applications *

Prototyping for product design and development
Construction industries
Packaging design for testing and validation
Educational models and teaching aids

*8.3 Advantages *

A cost-effective process
Capable of making durable prototypes
Versatility in materials including paper, plastic, and composite materials

*8.4 Disadvantages
*

Lower accuracy and resolution compared to processes like SLA and SLS
Limited in terms of intricacy and detail compared to some other methods
Additional post-processing is typically required to achieve the targeted surface quality and dimensional accuracy

*9. Printing Process selection *

As there are several types of 3D printing processes it becomes difficult to choose a process according to specified conditions. This section marks key parameters for selection of processes. These parameters are time, process cost, material, strength, surface finish, post processing, accuracy and applications of produced part. These parameters are mentioned below in tabular form.

*Note: *

$* represents the cost scale for the 3D printed object.
SLA: Uses a laser to build plastic in a layer-by-layer from liquid resin.
FDM: Parts built from successive layers by melting and extruding plastic filaments.
SLS: The process utilizes a laser to bond powdered material, plastic, chaining the particles to form a cohesive solid structure.
BJ: Uses an adhesive to glue powder particles together forming successive layers.
DED: A focused laser is used to melt and fuse materials during deposition, creating a solid structure.
LOM: Material layers are laminated together and then precisely cut into the desired shape using either a blade or a laser.
MJF: The process involves dispensing fusing agents onto a powder layer with inkjet arrays, followed by bonding the particles using infrared light.

Table 9 Printing Process selection

*10. Material Selection *

Material selection plays a crucial role in the 3D printing process, as the properties of the printed objects depend on the type of material used. Selection of a material is dependent on numerous factors such as type of 3D printing process, required finish, application and cost.

*10.1 Process of Material Selection
*
*10.1.1 Requirements *

Clearly defining project requirements is a crucial step in the material selection process. Factors to consider:

Mechanical Properties
Aesthetic properties
Environmental conditions
Applicational requirements

*10.1.2 Process
*
Identify the required or most suitable process. Factors to consider:

Printing Cost
Printing Time
Finish required

10.1.3 Material Properties

Material properties are aligned to the project requirements. Factors to consider:

Thermal properties
Chemical resistance
Cost and availability

*10.1.4 Printing Parameters *

The following printing parameters are to be considered:

Printing speed
Layer Height
Bed Temperature

*10.1.5 Post Processing *

The post-processing is dependent on the project's requirements. This may be dependent on strength and the required finish. The following are some post-processing steps carried out if required:

Curing
Cooling
Heating
Sanding
Painting

*10.2 Material Selection Table *

Below table shows comparison between each process and material used respectively:

*11. Conclusion *
Stereolithography delivers the highest level of accuracy, making it ideal for applications requiring minute details and precision, especially for small and intricate parts. However, it has drawbacks such as slower printing speeds and the need for extensive post-processing.

Direct Energy Deposition can be used for accurate metal parts. While it is an expensive method, it is primarily used for repairing or adding material to existing parts and for producing large, complex metal structures.

Binder Jetting is effective for creating sand casting molds, offering fast production and compatibility with a wide range of materials, including metals, sand, and ceramics.

Fused Deposition Modeling is a cost-effective option ideal for rapid prototyping where quick evaluation of form is important. However, this method might not offer the highest precision or surface smoothness when compared to other available technologies.

Selective Laser Sintering produces components with strong dimensional accuracy and surface quality, making it well-suited for both prototype development and functional applications. Caution is needed for thinner parts, as they may be more brittle.

Multi Jet Fusion is used for end-production parts. While it offers robust performance for many applications, it is not recommended where extremely tight tolerances are required. Multi Jet Fusion (MJF) can be used to produce finished functional parts for applications. They provide good mechanical strength and can be used directly. It cannot be used where tight tolerances are required.

*Author Details: *

Abhishek Kokare is a Product Design Engineer at eInfochips, with a postgraduate degree in Design, specializing in material selection and advanced manufacturing. His work focuses on integrating 3D printing technologies into practical, high-performance product solutions. This paper reflects his ongoing interest in the future of additive manufacturing and design innovation.

Internet Of Things (IOT) Application In Hazardous Locations

eInfochips — Thu, 15 May 2025 11:15:23 +0000

Introduction to Internet of Things (IOT):

Internet of Things (IoT) represents the fourth-generation technology that facilitates the connection and transformation of products into smart, intelligent and communicative entities. IoT has already established its footprint in various business verticals such as medical, heath care, automobile, and industrial applications. IoT empowers the collection, analysis, and transmission of information across various networks, encompassing both server and edge devices. This information can then undergo further processing and distribution to multiple inter-connected devices through cloud connectivity.

IoT Application in Oil & Gas Industry:

IoT is used in the Oil and Gas Industry for two basic reasons: First - low power design, a fundamental requirement for intrinsically safe products, Second - two-way wireless communication. These two advantages are a boon for the products used in Oil and Gas industries. The only challenge is for the product design to meet the hazardous location certification.
An intrinsic safe certification is mandatory for any device placed in hazardous locations. The certification code depends on the type of protection, zone, and the region where the product shall be installed.

In the North American and Canadian markets, the area classification is done in three classes:

Class I: Location where flammable gases and vapors are present.
Class II: Location where combustible dust is present.
Class III: Location where flying is present.

The hazardous area is further divided into two divisions, based upon the probability that a dangerous fuel to air mixture will occur or not.

Dvision-1: Location is where there is a high probability (by underwriting standards) that an explosive concentration of gas or vapor is present during normal operation of the plant.

Division-2: Location is where there is a very low probability that the flammable material is present in the explosive concentration during normal operation of the plant; so, an explosive concentration is expected only in case of a failure of the plant containment system.

The GROUP is also one of the meaningful nomenclatures of the hazardous area terms.
The four gas groups were created so that electrical equipment intended to be used in hazardous (classified) locations could be rated for families of gases and vapors and tested with a designated worst-case gas/air mixture to cover the entire group.
The temperature class definitions are used to designate the maximum operating temperatures on the surface of the equipment, which should not exceed the ignition temperature of the surrounding atmosphere.

Areas classified per NEC Article 505 are divided into three zones based on the probability of an ignitable concentration being present, rather than into two divisions as per NEC article 501. Areas that would be classified division 1 are further divided into zone 0 and zone 1. A zone 0 area is more likely to contain an ignitable atmosphere than zone 1 area. Division 2 and zone 2 areas are essentially equivalent.
Zone-0: Presence of ignitable concentration of combustible gases and vapors continuously, or for long periods of time.
Zone-1: Intermittent hazard may be present.
Zone-2: Hazard will be present under abnormal conditions.

IoT-based products can be designed for various applications, a few of them are listed below:

Temperature Sensor
Pressure Monitoring
Gas Monitoring
Flow Monitoring A typical block diagram of the IoT application is shown below:

Figure 1: IOT Block Diagram

An IoT product might consist of a battery as a power source or can be powered externally from either 9V ~ 36V DC supply available in the process control applications or 110/230Vac input.

The microcontroller can be selected based on the applications, power consumption, and the peripheral requirements. The microcontroller converts the analog signal to digital and based on the configuration can send the data on wired/wireless to the remote station. Analog signal conditioning stands as a pivotal component of the product, bridging the connection between the sensor and facilitating the conversion of analog signals for compatibility with the microcontroller. The Bluetooth interface suggested in the example is due to its wide acceptance and low power consumption. The wireless interface depends on the end-application of the product.

Electronics Design Consideration

The electronics design of an IoT product for a hazardous location is very complex and needs a careful selection of the architecture and base components as compared to the IoT developed for commercial applications. In case the IoT is for a hazardous location, the product must be intrinsically safe and should not cause an explosion under fault conditions. The product architecture should be designed considering various mechanical, and electronics requirements as defined in the IEC 60079 standards, certification requirements and the functional specifications.

Power Source: This is one of the main elements in an IoT-based product. Battery selection should meet the overall power budget of the product, followed by the battery lifetime. In case of intrinsic safety, special consideration is required for where the battery in charged. IEC 60079-11 clause 7.4 provide details for the type of battery and its construction details. Separation distance from the battery and electrical interface should be done as per Table-5 of IEC 60079-11. If the battery is used in the compartment, sufficient ventilation must be provided to ensure that no dangerous gas accumulation occurs during discharge or inactivity periods. In scenarios where IoT operates on DC power sources such as 9~36Vdc (nominal 24Vdc), the selection of power supply barrier protection becomes a critical consideration, particularly when catering to intrinsic safety norms. This necessitates a thorough analysis of the product’s prerequisites and the mandatory certifications. Adding to the complexity is the existence of IoT devices functioning on 230Vac, demands intrinsic safe calculations and certifications aligned with Um = 250V.

Microcontroller: Its central processing unit of the IoT product. The architecture of the microcontroller, power, and clock frequency processing must be carefully selected for a particular application. The Analog to Digital Conversion (ADC) part of the microcontroller should be selected based on the required accuracy, update rate, and resolution. Microcontroller should have enough sleep modes so that the power is optimally utilized for IoT applications and should have sufficient memory/peripheral interface to meet the product specifications.

Analog Signal Conditioning: The front-end block should meet the intrinsic safe requirements as per the IEC 60079 standards and should also protect the product from EMI-EMC testing. Barrier circuit should provide enough isolation for meeting the spark-gap ignition requirements and impedance requirement of the transducer. Also, along with the safety requirements, the designer should ensure that extracted sensor signal is not degraded from the excessive noise present in outside environment. All the sensors used for collecting data from the process parameters to the signal conditioning block must be certified for the particular zone.

Wireless Communications: There are various wireless options available for sending data from the IoT product to the sensor such as (6LOWPAN, ZigBEE, ZWave, Bluetooth, Wi-Fi, Wireless HART). Selection of a particular wireless interface requires knowledge of end application, RF-power, antenna, and protocol.

Selection of the interface for a particular IoT application should be done keeping these basic things in mind:

The amount of data to be shared to the server.
RF power.
Power consumed for each bit of data transferred.
Update rate of the data and distance of communication.
Security of data.

In case of intrinsic safe applications, it’s important to note that the use of certified modules does not directly confer suitability for deployment in hazardous locations. The product must undergo fresh testing within an intrinsic safe lab to assess both quantifiable and non-quantifiable ffaults, along with spark testing. or the countable and non-countable faults and spark testing. The RF power transmitted from the devices should be limited as per Table-1x of IEC 60079-0.
Conclusion

When building IoT solutions for hazardous locations, special conditions relating to creepage and clearance, encapsulation, and separation distance must be carefully considered. Also, when battery and RF signals are used, it’s expected the designer should be aware of the applicable standards and limitation of these standards for such products.

With more than 25 years of experience in designing mission-critical and consumer-grade embedded hardware designs, eInfochips is well poised to make products which are smaller, faster, reliable, efficient, intelligent and economical. We have worked on developing complex embedded control systems for avionics and industrial solutions. At the same time, we have also developed portable and power efficient systems for wearables, medical devices, home automation and surveillance solutions.

eInfochips, as an Arrow company, has a strong ecosystem of manufacturing partners who can help right from electronic prototype design, manufacturing, production, and certification. eInfochips works closely with the contract manufacturers to make sure that the designs are optimized for testing (DFT) and manufacturing (DFM) to reduce design alterations on production transfer.

To know more about this contact us.

einfochips can help product-based companies to develop intrinsically safe products and get the product certified by lab for various certifications like ATEX/IECEx/CSA.
References

"IEC 60079–0" in Explosive Atmospheres - Part 0: General Requirements, Geneva. Switzerland.
"IEC 60079–11 Part 11" in Equipment Protection by Intrinsic Safety “i”, Geneva, Switzerland.
"UL 2225" in Standard for Safety; Cables and Cable Fittings for Use In Hazardous (Classified) Locations, Northbrook. IL:UL.
"CSA C22.1–18 Rule 18–092" in Canadian Electrical Code Part I, Toronto, Canada:CSA Group.
"NFPA 70" in National Electrical Code, Quincy, MA: National Fire Protection Association.
"CAN/CSA C22.2 No.60079–0" in Explosive Atmospheres - Part 0: General Requirements, Toronto, Canada:CSA Group.

About Authors:

Kartik Gandhi, currently serving in the capacity of Senior Director of Engineering, possesses a distinguished career spanning over two decades, marked by a profound expertise in fields including Business Analysis, Presales, and Embedded Systems. Throughout his professional journey, Mr. kartik has demonstrated his proficiency across diverse platforms, notably Qualcomm and NXP, and has contributed his talents to several esteemed product-based organizations.
Dr. Suraj Pardeshi has more than 20 years of experience in Research & Development, Product Design & Development, and testing. He has worked on various IoT-enabled platforms for Industrial applications. He has more than 15 publications in various National and International journals. He holds two Indian patents, Gold Medalist and Ph.D (Electrical) from M.S University, Vadodara.

Ensuring Longevity and Reliability: The Role of Product Sustenance Engineering

eInfochips — Thu, 30 Jan 2025 06:26:23 +0000

In today’s rapidly evolving technological landscape, the lifecycle of a product doesn’t end once it hits the market. Product Sustenance Engineering is essential for maintaining and enhancing product value over time, ensuring that products remain competitive and functional in a constantly changing environment.

Understanding Product Sustenance Engineering
Product Sustenance Engineering involves ongoing efforts to support, maintain, and improve existing products. This discipline focuses on extending the product lifecycle, reducing the cost of ownership, and ensuring continuous customer satisfaction. By investing in these engineering services, companies can effectively manage obsolescence, upgrade product features, and address any emerging issues.

Key Aspects of Product Sustenance Engineering:

Obsolescence Management: Proactively dealing with components or technologies that are phasing out to ensure uninterrupted product availability.
Feature Upgrades: Continuously updating products with new features and enhancements based on market demands and customer feedback.
Cost Optimization: Streamlining production and maintenance processes to reduce costs without compromising quality.
Regulatory Compliance: Ensuring all products meet the latest industry standards and regulatory requirements.
The Importance of Integrated Engineering Solutions
Customer Satisfaction: By keeping products up-to-date and reliable, companies ensure high levels of customer satisfaction and loyalty.
Market Relevance: Regular updates and improvements help keep products competitive in the marketplace.
Revenue Stream: Sustenance engineering supports continuous revenue generation from existing products.
Leveraging Related Resources
To fully capitalize on the benefits of Product Sustenance Engineering, explore complementary services like Device Testing and Validation and VLSI Design Services. These offerings provide a holistic approach to maintaining product quality and performance throughout its lifecycle.

In conclusion, embracing Product Sustenance Engineering is crucial for companies looking to extend the lifespan of their products and remain competitive. It facilitates continuous improvement and adaptation in a fast-paced market. To learn more about how these services can support your business objectives, visit our detailed service page here.

ProductSustenance #EngineeringExcellence #LifecycleManagement #ObsolescenceManagement #FeatureUpgrade #CostOptimization #RegulatoryCompliance #TechInnovation #CustomerSatisfaction #MarketRelevance #RevenueGrowth

Streamlining Product Development: Design to Manufacturing Services

eInfochips — Thu, 30 Jan 2025 05:46:54 +0000

In the fast-paced world of technology, bringing a product from concept to market swiftly and efficiently is crucial. Design to Manufacturing Services are at the forefront of this process, providing a seamless transition from design through to production.

The Importance of Design to Manufacturing Services
The journey from a design to a tangible product involves numerous stages, each critical to the success of the final product. Design to Manufacturing Services ensure that all these phases are interconnected, minimizing the potential for errors and delays. By leveraging expertise in both design and manufacturing, companies can optimize resources, reduce costs, and accelerate time-to-market.

Key Phases in Design to Manufacturing:

Conceptualization: The process begins with a detailed understanding of the project requirements, followed by brainstorming and conceptual designs.
Design: This phase involves creating detailed design specifications and prototypes to ensure feasibility and alignment with project goals. Here, collaboration with product design services can greatly enhance the effectiveness of the design.
Validation: Rigorous testing and validation are conducted to ensure that the design meets all specified requirements and standards.
Production: The final phase involves setting up and optimizing manufacturing processes, ensuring efficient and quality production runs.
Benefits of Integrated Design to Manufacturing Services
Enhanced Collaboration: These services foster collaboration between design and production teams, ensuring that all stakeholders are aligned.
Reduced Time-to-Market: By streamlining processes and reducing inefficiencies, these services help get products to market faster.
Cost Efficiency: Identifying potential issues early in the design phase helps avoid costly revisions and reduces overall production costs.
Internal Resources and Related Services
For those seeking more detailed insights, consider exploring other resources such as our VLSI Design Services and Product Prototyping Solutions. These services offer additional layers of support in the design and manufacturing ecosystem, ensuring comprehensive solutions tailored to your needs.

In conclusion, utilizing Design to Manufacturing Services not only bridges the gap between design and production but also enhances the overall product development lifecycle. By integrating these services, companies can innovate faster, maintain quality, and achieve their market goals efficiently. For a deep dive into how we can assist with your specific needs, visit our detailed service page here.

Elevating User Experience with eInfochips' Multimedia and Digital Solutions

eInfochips — Wed, 29 Jan 2025 07:26:04 +0000

As the digital era advances, the demand for rich multimedia experiences continues to surge. To stay ahead in this competitive landscape, businesses must harness advanced Multimedia and Digital Solutions to deliver immersive content and superior user experiences. eInfochips, with its deep expertise in device engineering, provides cutting-edge solutions that cater to these evolving needs.

How eInfochips' Multimedia and Digital Solutions Can Benefit Your Business
eInfochips offers a wide array of services designed to enhance multimedia capabilities and digital content delivery for various industries. These solutions are pivotal for companies looking to provide high-quality audiovisual experiences, robust digital content, and innovative interactive features. Here are some of the ways eInfochips can help your business achieve excellence in multimedia and digital services:

Content Delivery Optimization: eInfochips ensures seamless content delivery across various platforms and devices, enhancing user experience and engagement.
Custom Media Solutions: Tailored media solutions that address specific business needs, from live streaming and video-on-demand to interactive applications.
Advanced Audio and Video Processing: Expertise in advanced audio and video codecs, ensuring high-quality playback and efficient streaming.
Augmented and Virtual Reality: Development of immersive AR and VR experiences that can transform user interaction and engagement.
Multiscreen and Cross-Platform Solutions: Ensuring consistent and high-quality experiences across multiple devices and platforms.

Key Offerings by eInfochips in Multimedia and Digital Solutions
eInfochips' Multimedia and Digital Solutions are comprehensive and tailored to meet the specific needs of each client. Here are some of their standout offerings:

• Video and Audio Compression: Implementing efficient compression techniques to ensure high-quality media while minimizing bandwidth usage.

• Streaming Solutions: Providing end-to-end streaming solutions, including live streaming and video on demand, to deliver content with minimal latency.

• Interactive Applications: Developing interactive media applications that enhance user engagement through features like touch interaction, gestures, and real-time feedback.

• Digital Rights Management (DRM): Ensuring secure delivery of digital content through robust DRM solutions to protect against unauthorized access and distribution.

• AR/VR Development: Crafting immersive augmented reality (AR) and virtual reality (VR) experiences for enhanced user interaction and engagement.

Success Stories and Use Cases

eInfochips boasts a rich history of successful projects in the multimedia and digital domain. Some notable use cases include:

• Entertainment and Media: Development of high-quality streaming services and interactive media applications that enhance user experience.

• Education: Creating engaging e-learning platforms that utilize multimedia content to improve learning outcomes.

• Retail: Implementing AR and VR solutions that provide immersive shopping experiences and increase customer engagement.

• Healthcare: Enhancing patient care with multimedia solutions that include telemedicine and interactive health applications.

eInfochips also provides expertise in Embedded Software Development Services, ensuring seamless integration of multimedia capabilities into hardware systems. Additionally, explore their AI and Machine Learning Solutions, which can further enhance multimedia applications with intelligent features and analytics.

Conclusion

By leveraging eInfochips' Multimedia and Digital Solutions, businesses can significantly enhance their content delivery, user engagement, and overall user experience. With a proven track record and deep expertise, eInfochips stands as a reliable partner in navigating the complexities of multimedia and digital content. Visit eInfochips to learn more about their extensive range of technology solutions designed to meet diverse industry needs.
Enhance your multimedia capabilities and digital content delivery by partnering with eInfochips today.

Revolutionizing Automotive Software: A Deep Dive into AUTOSAR and Its Impact on the Industry

eInfochips — Tue, 12 Sep 2023 07:03:32 +0000

Introduction:

In today's fast-paced automotive industry, where cutting-edge technology and innovation drive progress, the need for standardized software solutions has never been more critical. Automotive companies are continuously striving to enhance the performance, safety, and efficiency of vehicles while meeting stringent regulatory requirements. This is where AUTOSAR (Automotive Open System Architecture) comes into play as a game-changer. In this blog post, we will explore what AUTOSAR is, its applications in the automotive industry, and how eInfochips is contributing to this transformative ecosystem.

AUTOSAR: A Brief Overview

AUTOSAR is an open and standardized automotive software architecture that enables the development of scalable and reconfigurable software for automotive ECUs (Electronic Control Units). It was created to address the growing complexity of automotive software, allowing manufacturers to build and manage complex software-driven functionalities while ensuring interoperability across different vehicle platforms.

Key Benefits of AUTOSAR:

Interoperability: AUTOSAR fosters collaboration by establishing a common framework and communication protocols, making it easier for various stakeholders to work together seamlessly.

Scalability: Automotive manufacturers can develop software components that are easily adaptable to different vehicle models and platforms, reducing development time and costs.

Safety and Security: AUTOSAR places a strong emphasis on safety and security, crucial aspects in today's connected and autonomous vehicle landscape.

Applications of AUTOSAR in the Automotive Industry:
AUTOSAR's impact on the automotive industry is substantial, spanning various applications and domains. Here are some key areas where AUTOSAR plays a pivotal role:

Advanced Driver Assistance Systems (ADAS): AUTOSAR facilitates the development of sophisticated ADAS features, such as adaptive cruise control, lane-keeping assistance, and automated parking systems, enhancing driver safety and comfort.

Infotainment Systems: Modern infotainment systems rely on AUTOSAR to seamlessly integrate multimedia, connectivity, and navigation features into a unified user experience.

Powertrain Control: AUTOSAR enables precise control of engine performance, emissions, and fuel efficiency, helping automakers meet stringent environmental regulations.

Body Control: It allows for the development of intelligent body control modules that manage functions like lighting, door locks, and climate control, enhancing vehicle convenience and energy efficiency.

einfochips: Pioneering AUTOSAR Solutions

einfochips, a leading technology solutions company, has been at the forefront of developing cutting-edge AUTOSAR solutions for the automotive industry. Their expertise in AUTOSAR architecture and software development has empowered automakers to accelerate their product development cycles, reduce costs, and stay ahead in a competitive market.

Conclusion:

In the ever-evolving automotive industry, AUTOSAR has emerged as a linchpin for innovation, standardization, and collaboration. Its wide-ranging applications, from advanced driver assistance systems to infotainment and powertrain control, have reshaped the way vehicles are designed and manufactured. Companies like einfochips are instrumental in driving this transformation by providing specialized AUTOSAR solutions. As technology continues to advance, AUTOSAR remains a vital tool for shaping the future of the automotive industry.