Adding support for multiple hardware uarts to Wio Terminal

Products & Technology Wio Series
#1

Does anyone have examples of using multiple hardware UARTs with Wio Terminal?

The SAMD51 supports multiple sercom devices so it should be possible. I found reference in the XIAO section of the forum to Require 3 hardware UARTs which provides helpful information on the SAMD21 however I am having difficulty figuring out which pins are available and routed to the header on the Wio Terminal.

Any examples based on the Wio Terminal would save me a lot of time.

#2

You can try to establish a soft serial port for communication, here is the code after successful testing

#include <SoftwareSerial.h>

SoftwareSerial mySerial(6, 8); // RX=A6, TX=A8

void setup()

{

  Serial.begin(115200);

  while (!Serial) {

  }

  Serial.println("Goodnight moon!");

  mySerial.begin(9600);

  mySerial.println("Hello, world?");

}

void loop()

{

  if (mySerial.available())

    Serial.write(mySerial.read());

  if (Serial.available())

    mySerial.write(Serial.read());

}

Hope it will help you

#3

That solution uses software serial ports, which unfortunately are not fast enough for my purposes. Note that the topic says multiple hardware uarts. (but thank you for trying :slightly_smiling_face:!)

I believe that the solution will probably require additions to the code near the end of variant.cpp to use SERCOM3 and/or SERCOM5.