@atpfm@mastodon.social to continue along the grid-failure path, allow me to send you down the rabbit hole of meshcore. Text messaging over LoRa - no cellular network required. https://meshcore.co.uk/ Introduction video here: https://youtu.be/t1qne8uJBAc You can check coverage maps of your area here: https://meshcore.co.uk/map.html Of course there’s two competing standards, with the alternative Meshtastic - https://meshtastic.org/ However Meshcore now seems to be taking over in popularity.