There are some people working on IoT related Nostr stuff. There are also a bunch of #meshtastic people on Nostr.
I never got to do any outdoor deployments, but i have done outdoor radio network field tests and planning.
For the most part it was deploying sensornetworks ranging from couple hundred to thousands of sensors inside large office buildings. And i designed a mold prediction sensor that unfortunatly we never ended up developing.
But these days i dont do all to much with that kind of stuff and am focussed on Nostr as such.
Cool you came across Nostr (and bitcoin for that matter). Hope you will find your way and interesting people.