[Solved] I cant write to Serial2 or Serial1 or Serial3 on Arduino DUE SIM7600 ?

Hi

Pls somebody can tell me why my code is not working? I only can read data from serial1 but I cant write to serial1 the AT commands

I wrote a ATI on serial monitor commands and never it was sent to serial1 port connected to SIM7600 module.

If connect the SIM7600 module using the pins of USB serial interface of chip , It works perfectly using putty on windows.

Finnaly my code works :slight_smile: I solved

I added this line in setup section

Serial.setTimeout(50);

Good job, maybe you can add "[Solved]" in the title to help other users as well