I've been working on trying to help fill out the MeshCore network in our area for off-grid communications. Some of us are setting up solar powered, battery backed MeshCore nodes, they have no connection to power or Internet. You can use a small device (like a credit card or a small walkie-talkie) with a phone, or a blackberry-like device, to send/receive encrypted messages, chat on channels, or communicate on BBS-like "room servers".
It's interesting for if there were some sort of disaster impacting the cell network, or for use in the back woods where you have no cell contact. But it's extremely unreliable. My coworker who is into it, he lives 2-3 miles away but we can rarely communicate because he lives in a bit of a bowl that we don't have reachability into. Meanwhile I'm regularly getting messages from 30-70 miles away no problem.
It reminds me a lot of HAM radio, where there are other better ways to communicate, but if those ways broke it would be nice to have an alternative.
It's interesting for if there were some sort of disaster impacting the cell network, or for use in the back woods where you have no cell contact. But it's extremely unreliable. My coworker who is into it, he lives 2-3 miles away but we can rarely communicate because he lives in a bit of a bowl that we don't have reachability into. Meanwhile I'm regularly getting messages from 30-70 miles away no problem.
It reminds me a lot of HAM radio, where there are other better ways to communicate, but if those ways broke it would be nice to have an alternative.
https://meshcore.co.uk/