Unclear how to set up LoRaWAN library for AS923-3 (915 - 918 MHz)

[joshctaylor]

Hi All - a support question / feature request for you:

I'm unsure of how to set up the libraries for AS923-3 (only channel 3) to use the UK's newly opened 915 - 918 MHz license exempt band.

https://lora-alliance.org/sites/default/files/2020-06/rp_2-1.0.1.pdf

I'm using OTAA LoRa but would like to ensure I use the correct frequency. The LoRaWAN_Join_ABP.ino gives me a few clues but I am unsure how to implement the use of channel 3 only between 915 - 918 MHz.

If anyone could guide me I'd be very appreciative - Many thanks