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Freelance projects

CAN-BUS filter STM32G431

C & C++, Embedded Systems & Microcontrollers — incorrectly specified categories?

320 USD

Client's review of cooperation with Oleksii Mamontov

CAN-BUS filter STM32G431

320 USD

The project was completed on time, this is the first, but not even the main thing, I searched for a long time for a person who would do the project on different hardware (different people promised to do everything and disappeared after trying), but Alexey offered me a more optimized option with development prospects, as it turned out he was right 100%, overall he is a person who knows exactly what he is doing, without fluff and "it won't work, I am not familiar with that". Ten out of ten stars.

5.0

Alex Probich

Reciprocal Feedback

10 July 2025

Freelancer's review of cooperation with Alex Probich

CAN-BUS filter STM32G431

320 USD

The project is interesting, I hope I helped)
The client is adequate, responds to questions, I think I will be able to help in the development of his project further.

5.0

Oleksii Mamontov

Reciprocal Feedback

10 July 2025

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Brief technical assignment without unnecessary details:

MCU1

STM32G431, 8 MHz crystal
CAN (500 kbps, 11-bit ID), UART (1 Mbps, 8N1).
Receives CAN, sends a string in UART [CAN_ID] [data]
Receives a string from UART, sends it back to CAN.

MCU2

STM32G431, 8 MHz crystal.
CAN (500 kbps, 11-bit ID), UART (1 Mbps, 8N1).
Receives a string from UART, compares it with a table (up to 50 entries, future modifications possible): if it matches, replaces the data, then sends to CAN. If not — sends as is.
Receives CAN, sends a string back to UART to MCU1.

The message flow rate is approximately 15000 per second (both directions). The length of incoming and outgoing messages is the same (without extra zeros).

In the future, a separate project may be created for software configuration of the CAN filter. The filter is inserted into the real CAN bus, with zero loss percentage — likely implemented with ring buffering.

I will consider all proposals.

Update #1 from 30 May 2025

Note: as a device embedded into the break of the real CAN bus, it must perform data reception and transmission in two directions (conditionally CAN1 (Transceiver TJA1051-MCU1-UART-MCU2-transceiver TJA1051-CAN2) and in the reverse order, with the only difference that part of the data (predefined in advance) is replaced in MCU2 and then transmitted from CAN2, while the remaining data is transmitted unchanged in both directions.

Proposals 3 Discussions 4

Please select

Maxim Genov

7 2

Budget: 350 USD Deadline: 30 days

Hello Alex. I can complete your project. I have experience in software development. I work with STM32, AtMega, ESP32. For clarification of project details, please message me privately. Thank you for your attention.

Oleksii Mamontov

Winning proposal

9 0

Projects 9
Rating -
Rating 796

Budget: 320 USD Deadline: 30 days

Everything can be done more simply, he has a brother stm32g473.
So I can make a board, order it from EasyEda, it will be assembled for you in 5 days )

Leonardo Vargas

0 0

Projects -
Rating -
Rating 99

Budget: 700 USD Deadline: 7 days

Hello! I can help you with this project. The setup is clear and well thought out. I have worked with STM32 in similar real-time communication configurations, so handling high-speed CAN and UART traffic with proper buffering and stability is something I am very comfortable with. I will ensure that the firmware is clean, efficient, and easily modifiable later. The search logic on MCU2 and the future possibility of adding a CAN filter can be built. I am ready to start.

Oleksii Mamontov 30 May 2025

У нього є брат STM32G473 з 3 CAN ))
Все це можна реалізувати на його базі, не треба 2 MCU

Oleksii Mamontov 30 May 2025

He has a brother STM32G473 with 3 CAN ))
All this can be implemented on its basis

Oleksii Mamontov 30 May 2025

Це буде маленька плата , і не треба ніякого інтерфейсу uart

Alex Probich

30 May 2025

Ответил Вам в личку. Здесь дело в перспективе, возможно придется делать фильтр в обе стороны, если такой поток выдержит и успешно справится 473й чип -то почему бы и нет. Плата однозначно будет нужна, ибо то что сейчас у меня на руках имеет питание 5 вольт, требуется вообще от 16 и ниже блок питания стабильный.

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Alex Probich
New York, United States

Projects 1
Rating -
Rating 271