Is there a good reference guide for the available AT commands that can be used?
nRF9160 Feather
jamlamb1959 here are the latest AT commands: https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/intro.html
You can also download the PDF version here:
https://infocenter.nordicsemi.com/pdf/nrf91_at_commands_v1.7.1.pdf
Thanks exactly what I was after.