Hi @Bryn_Parrott ,
Did you use SeeedJP STM32 Boards on Wio LTE Cat.1 board?
If yes, I can help you.
FYI
Make a development-envirionment for Wio LTE Cat.1.
https://seeedjp.github.io/Wiki/Wio_LTE_for_Arduino/Setup-ja
(Sorry, it is Japanese only.)