SW & HW Services
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Comarch is ready to provide services in the following areas:

  • Bluetooth Classic, Bluetooth Low Energy (BLE Mesh, BLE Audio) and Dual-Mode solutions
  • Hardware development consultancy
  • SW and FW architecture advisory
  • Firmware development (stack development (controller, host), application development)
  • Integration of various sensors into wearable audio devices, for example, touch sensors with gesture recognitions, proximity sensors, accelerometers, active noise cancelling implementation and TWS implementation

Knowledge and ability to implement the latest Bluetooth features:

  • 5.2 (e.g., BLE Mesh, LE Audio, Auracast)
  • 5.4 (e.g., ESL, PAwR, Encrypted Advertising Data)
  • 6.0 (e.g., Channel Sounding, Ranging Service, DBAF)
  • Integration with real-time operating systems (FreeRTOS, Zephyr)
  • Companion apps development (web, mobile (iOS, Android, hybrid))
  • Interoperability testing
  • Quality assurance as an integral part of other services
  • On-site production line support

Comarch, besides commercial projects, has its own R&D department focused on training and implementing projects based on the latest Bluetooth standards.

Our projects related to Bluetooth technology:

Comarch and Silicon Labs Cooperation

Firmware Development and Maintenance for Wireless Connectivity Modules – Bluetooth Classic, BLE, Dual Mode

Selected project tasks:

  • Design and implementation of various features for wireless modules
  • Fixing reported bugs and provide technical feedback and support for developed functionalities
  • HomeKit integration with BLE and OpenThread stacks
  • Testing and verifying current implementation against vulnerabilities reported for BT LE, BR/EDR
  • Automation of tests against BT SIG qualification tool for BT Mesh devices

Silicon Labs Case Study>>

Comarch and Renesas Cooperation

Renesas and Comarch worked together to further develop and improve the TWS-based chip solution. Comarch provided a hands-on experienced team of engineers, members of which were specialists in software and firmware development, especially in audio technologies, such as True Wireless Stereo and wireless connectivity using dual-mode Bluetooth Low Energy and Bluetooth Classic solution.

Comarch’s role:

  • Integrator for the project
  • Implementation of the audio framework
  • Implementation of stream synchronization between headphones
  • Bluetooth stack debugging
  • Implementation of a mechanism for extracting audio packets to relieve the main computing unit
  • Preparation of test applications for all types of audio streams (BLE, BLE Audio, Bluetooth Classic)

Renesas Case Study>>

Services for Packetcraft (Bluetooth 5.2 and 5.4 stack)

Comarch’s responsibilities:

  • Support implementation process of PAwR (Periodic Advertising with Responses BLE 5.4 feature) by creating automated tests and helping with firmware implementation – focused in Controller layer of the Bluetooth stack (Link Layer, HCI (Host-Controller Interface), PHY (Physical layer))
  • Creating test plans and strategies for firmware implementation
  • Support implementation process of OTP (Object Transfer Profile) service
  • Executing EBQ (Ellisys Bluetooth Qualifier) test cases and checking logs
  • Working on RAM memory usage and code size optimization – dynamic allocation to reduce static memory if possible, creating unions from few structures, structure variables alignment, reuse of unused buffers, etc

  • Working with other BT features such as CTE (Constant Tone Expression), PA (Periodic Advertising), EAD (Encrypted Advertising Data)
  • Maintenance of existing controller test cases (LL (Link Layer)/HCI Test Suits) - valid with official bluetooth link layer test cases and creating new ones to ensure great product quality
  • Planning and creating new vendor specific test cases to validate custom features
  • Introducing new upgrades to existing test framework to automate executing test scenarios in a more efficient way
  • Continuous work on Bluetooth stack development (features such as CIS (Connected Isochronous Stream)/BIS (Broadcast Isochronous Stream) and others) in cooperation with an international team

Packetcraft Case Study>>        

Scope of Work and Key Activities – Zephyr

  • External BLE Host Porting – integrated into Zephyr’s Bluetooth subsystem with necessary build system
    modifications.
  • Host Selection Mechanism – enabled developers to choose between Zephyr’s default BLE Host and the
    external stack at build time.
  • Translation Layer – implemented conditional compilation for seamless sample application compatibility across multiple BLE Hosts.
  • HCI Driver Integration – ensured smooth communication by integrating the external BLE Host
    with Zephyr’s HCI drivers.

 

  • CI/CD Pipeline – established pipelines for build validation, PTS qualification tests, and power
    consumption analysis.
  • Demo Applications – developed sample apps to validate BLE functionality, including BLE audio streaming on nRF5340 Audio DK with Google Pixel 7.

Zephyr Case Study>>

Bluetooth headset with telemetric (A2DP, HFP,AVRCP, proprietary profiles)

  • Firmware development
    • CSR and Qualcomm SoC
  • Integration of libraries from different suppliers
  • Codecs integration and external codecs optimization
  • Quality assurance
  • Manufacturing test tools development
  • Production line support
  • Companion application development for PC and mobile
    • Firmware upgrade
    • Headset configuration
    • Telemetric acquisition
       

Bluetooth earbuds (A2DP, HFP, AVRCP, proprietary profiles)

  • Bluetooth connection between each earbud for stereo audio
    • Qualcomm family chip
  • Integration of various sensors
    • touch sensors
    • proximity sensor
    • accelerometer
  • Over the air update
  • Charging case SW developed from end to end
  • Quality assurance

Qualcomm Chipsets used in the projects: CSR8675, QCC5121, QCC5141, QCC5151, QCC5171.

Comarch for WSAudiology

Hearing Aid Platform Development

For Comarch, the project started with building a testing platform as the basis for the further development and verification process for the client. Simultaneously, we ran hardware tests in search of possible improvements. After presenting the  results to WSA, we assisted with fixing issues. The next step was to develop the device low level drivers in C++ and implement Bluetooth module support for the audio stream services. We have also provided the test framework to ensure the usability and to support the further implementation of planned features.

WSAudiology Case Study>>

Automotive Bluetooth Transmitter – TIER 1 Automotive Company

Project scope:

  • System architecture, Bluetooth firmware design, MCU to Bluetooth module protocol design
  • Implementation of Bluetooth transmitter module
  • Deliverables: binaries, software release notes, software code, software documentation, test results, error reports
  • Transmitter MCU mock simulator (UART communication for testing)

  • Complete and independent project management including setting up development environment for Comarch tasks
  • Hardware review and HW issues resolving support
  • Complete QA
  • BT SIG certification support (including internal PTS test).
  • Delivering documentation for implemented SW and related processes
  • Onsite workshops, hardware prototypes bring-ups (four HW versions)
  • Project started with incomplete scope, flexible approach to delays in the project due to HW delays

Companion Apps

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