STM32 and sim900a tcp/ip

[fchai.1]

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]

Hello @fchai.1​ and welcome to Community 😀 ,

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