Someone else mentioned 802.11ah. This might be a better option for cheap hardware than normal wifi, which is quite hard to use beyond 1km reliably. Existing po

Someone else mentioned 802.11ah. This might be a better option for cheap hardware than normal wifi, which is quite hard to use beyond 1km reliably. Existing point-to-point solutions would be even better but I am sure you (some other comments also point to this direction). I also want to add that at low datarates like 0.1Mbps, you probably can't just bridge it to the internet and expect it to work well. You'll want to be careful about who and what access is allowed. 0.1Mbps is plenty for relaying messages point-to-point for multiple users, but even one user searching google or using slack will saturate it. A few users trying to load gmail will probably not work at all.