This is great. Also check out Meshtastic. I have been playing around with it for a few weeks with cheap LoRa devices. Here in NC, most of the state is covered!
my weekend project to learn more about bluetooth mesh networks, relays, store and forward models, encryption models, and a few other things: https://github.com/jackjackbits/bitchat
nostr-only TestFlight if you want to play with it: https://testflight.apple.com/join/QwkyFq6z
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