I am wondering if there is a chat program that works locally when the internet is out but still be connected to from the internet. I know this will be something that is self hosted.
Bonus points if I can set it up on the raspberry pi that is running Home Assistant.
I did some looking into matrix but couldn’t find if it would still work when the internet is out.
Not really. You need to use a domain (correct me, if I’m wrong, but I think IP adresses don’t work) to connect to the homeserver.
In theory you could setup a DNS server in your nezwork, which resolves this domain with the local adress and then it might work, but I’m not sure if the homeserver would like that.
Also I want to add, that I use TeamSpeak, which works perfectly globally and locally, but it’s for voice chat.
[This comment has been deleted by an automated system]