Hi there,
You can use below library and configure as below define. thanks.
#################### SAMD ######################
#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE
#define COMSerial Serial1
#define ShowSerial SerialUSB
RH_RF95 rf95(COMSerial);
#endif
<LINK_TEXT text=“http://wiki.seeedstudio.com/Grove_LoRa_ … ad-library”>http://wiki.seeedstudio.com/Grove_LoRa_Radio/#download-library</LINK_TEXT>