Use the XIAO USB connector as power supply. The XIAO regulates the voltage down to 3.3v for the RFM module.
At the bottom of the PCB are extra connections for powering sensors or other modules.
The RFM only works on 3.3 volt. Higher voltage will damage your LoRa module!!
The PCB makes all the necessary connections from the XIAO to the RFM module.
MISO, MOSI and SCK are connected to the standard pins.
The only thing you need to change in your sketch are the DIO and the NSS pins
|DIO1||Jumper X-3 to A3|
|DIO2||Jumper X-3 to A3|
|RST||Jumper X-0 to A0|
This board is tested with the following libraries:
Change the pin-mapping in your sketch to mach with the pin-out table above. (DIO0 optional DIO1, DIO2 and Reset)
If you use the LoRa-lmic library you must provide your – network session key, application session key and device address.