====== RAK2245 Pi Hat ======

https://downloads.rakwireless.com/en/LoRa/RAK2245-Pi-HAT/

https://downloads.rakwireless.com/en/LoRa/RAK2245-Pi-HAT/Application-Notes/Get_Start_with_RAK2245%26RAK831_RPi_LoRa_Gateway.pdf