Based of this example, this repo connects an Arduino Uno with the Semtech SX1272 mbed shield, the code has been updated to use the latest RadioLib version (5.7.0) and fixes the pinout according to the ...

The arduino R3 pinout includes an IORef pin which will be 5v on a 5v arduino but 3.3v on a 3.3v arduino. Any IC’s on the shield should run at IORef. Report comment. Reply. F says: ...