I haven’t heard of AMPRnet before. Sounds interesting.
As for emergency communications, in an actual emergency (risk to life and limb kind of deal) any person, whether qualified or not, has legal permission to use any radio they find.
I wasn’t sure about that, so that’s good to know!
Mail detector sounds like a perfect use for LoRA. But I suspect that there is no security by default and anyone would be able to send you such a message if they were mean :).
I was thinking about this WiFi idea, because I think it could be useful in case of an emergency. I think there should be services hosted inside of cities. I mean in their local networks. It could be local government websites and maybe things like a Lemmy instance where people could talk. Even stuff like Open Street Map could maybe be useful. So if the city was for some reason cut off from the internet and the mobile network, most people would still be able to communicate and have access to information. It would be like having a tiny backup of the internet (at least whatever is possible to self host). I think it’s a big oversight to only rely on the internet.
Something like this could maybe be also useful in countries with authoritative governments, which sometimes cut off internet access in the entire country. In the long term the government would probably find out and try to stop it, though.
But as you’ve explained, making something like this would require many people working together and ideally should probably be handled by a local government instead. It’s not something I plan on doing, it just seemed like a cool idea to think about.
I might try playing with LoRA for some other project some day, if I can legally use it without a license. But if I can’t encrypt the messages, then I would probably prefer to use WiFi (for short distances) instead.
In your case, to have emergency communications with your family, maybe CB radio or satellite phones would be a solution?
Thanks for a very detailed explanation! So it seems that this is almost impossible. Except for maybe a small part of a city.
The lack of encryption, privacy and anonymity in HAM radio would be an issue for me. Just like in mobile phones. But since you can use end-to-end encryption over WiFi (and some weaker, less useful encryption is used in mobile phones), maybe there are exceptions. I’ve heard of LoRA, but I wouldn’t want to use it, unless I’m allowed to encrypt the messages. It also seems that the message length is very limited, so using something like PGP might not always be possible.
You know HAM radio? It’s kinda interesting, because people can use it to talk to each other and it technically doesn’t require any infrastructure. But there are also repeaters in cities that can increase the range.
I’ve been wondering why people don’t try to do something similar with WiFi? Some kind of city-wide WiFi network with repeaters. It’s probably difficult and I’m not sure if it would have any practical use. But the advantage over HAM radio is that it’s encrypted and doesn’t require a license. I imagine that people could use it to chat with each other and share stuff without having to rely on social media or the internet.
The Free Software movement. So the idea that people deserve certain rights when using computers, so that they can control their own devices.
True :D