There are some significant changes going from version 1.x.x to version 2.x.x of this library. begin()for the Serial object used needs to be run before runningbegin()for the library itself, e.g.: Serial1.begin(3
This library has been tested with the following boards and cores: Board NameCoreWorks Arduino Due Arduino SAM Boards (32-bits ARM Cortex-M3) by Arduino 1.6.12 Yes Arduino Giga Arduino Mbed OS GIGA Boards by Arduino 4.2.1 Yes Arduino Leonardo Arduino AVR Boards by Arduino 1.8.6 Yes Arduino...