Happy new year folks! I’m back with a brand new set of problems 
The sketch “works” with the correct resistors. I’m getting messages through but here’s where it gets interesting:
I’ve got 5 of these built now, all of them with the same configuration, same hardware and same sketch bar the hostname being 1-5.
Numbers 1 and 3 have worked perfectly without skipping a beat for days now, 2,4 and 5 seem to hang up, they’ll do their job once then just hang, I can see them sitting on the network the whole time while the working ones are only connected for a few seconds every 15 minutes. If I manually boot them off the WiFi (using unifi cloud key controls) they’ll run the sketch once which will message the info to mqtt broker then hang again. Could my hasty soldering skills be the issue or should I be looking for firmware updates (is that even a thing).
Hoping someone can point me in the right direction again.