MemberFebruary 23, 2021 at 10:25 am
Hi W. Mets,
I am wondering how you have used the pins 2 and 3 for the UART at MINI? Are you using SoftwareSerial library? I assume that you connected the shield to the X1 pinheader, right?
Next point is the MAXI – here you should use pins 18 and 19, but the communication must be done through Serial1 .