I'm still in the process of getting a Hello World working.
Whatever I do the shield won't connect.
Can one of you help me with input about the serial ports used and if possible an example "terminal server" sketch for M0 board connected to shield so I manually use AT commands with direct feedback on results.
I tried to build such a sketch myself from older ones for Uno and Mega where I used SerialUSB (?) and Serial1 (?) but that doesn't work and I get compilation errors.