Has anyone heard of Meshtastic? Found this via some offgrider types on YouTube.

from their about section: 
'Meshtastic® is a project that enables you to use inexpensive LoRa radios as a long range off-grid communication platform in areas without existing or reliable communications infrastructure. This project is 100% community driven and open source!'

seems to be some new tech related to ham radio and sdr or something?

https://meshtastic.org/docs/introduction

https://image.nostr.build/9956a5edb97101ebccba667f63f6f21a0ba6256f473b8a885cc80962928c1c56.jpg 

https://www.youtube.com/watch?v=7v6UbC5blJU