SoftwareSerial library (provides additional serial ports via software) doesn’t work with Xiao. Is there an equivalent library for Xiao ?
Alternately, info on reconfiguring SERCOMs per SAMD21 datasheet & variant.cpp location would be helpful.
Xiao can have up to 3 UARTS if you’re willing to sacrifice some other things. I have 2 running now by modifying some underlying configuration files. Not nearly as straightforward as including a library but functional. Info provided if anyone is interested.
Preview : Seeeduino XIAO Serial Communication Interfaces (SERCOM)
I’m sorry for my wrong answer, I used the A0 and A1 ports of the Seeeduino XIAO as the soft serial port, and the effect is very good.
SoftwareSerial mySerial(0, 1); // RX, TX
Yes ! That works too.