STM32 and sim900a tcp/ip

fchai.1 · ‎2023-02-15

Hi, i'm using an stm32F446re to read modbus rtu buffer from plc using usart1. now i need to send this data to a server using the gprs module sim900a on uart4 via tcp/ip.

Any help please???????????

KDJEM.1 · ‎2023-02-24

Hello @fchai.1 and welcome to Community :grinning_face: ,

I advise you to take a look at "STM32 Master MODBUS LL Library" example.

Also, this discussion can help you to implement the MOBUS TCP.

Hope my answer helped you!

Kaouthar

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