RAK3172/3272-SiP softwareserial is supported?

LPWAN Modules / EVBs RAK3172
1

Hi all, just a very noob question to avoid wasting time in testing:
is softwareserial library supported? What flavor (softwareserial, altsoftserial, …)

I’m thinking to softwareserial because:
UART2 → AT Commands and debug
UART1 → modbus 485 interface
I need 1 more uart to connect a PMS5003 (family) sensor (it need both tx/rx)

Thanks a lot

2

I tried to use common SoftwareSerial libraries in github. Most are based or derivative of SoftwareSerial compatible to Arduino boards. Even altsoftserial is based on Arduino SoftwareSerial. It is common to see specific implementation of SW serial like for Espressif chips, STM32duino, etc.

For RUI3, it is not supported at the moment.

If you really need more than 2 UART, options might be.

  1. Add a extra MCU.
  2. Remove AT commands function in UART2 and dedicate both UART1/2 for your application. For debugging, you can probably use other ways like (1) temporarily use UART1 and 2 to test one UART function, (2) use IO signals for debugging or (3) use external display like I2C LCD for temporary debug display.
3

Thanks for the replay, as suggested I’ll try a different approach in order to use only the 2 hw UARTs.