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Cross State Communication
(piefed.social)
A community to discuss Meshtastic (https://meshtastic.org/docs/introduction)
Other mesh communities:
MeshCore: !Meshcore@feddit.org Reticulum: !Reticulum@mander.xyz
HAM radio is about it for long comms that aren't dependent on other systems.
Even then it takes technical skill on both ends to make that work.