Is there a chat program that works offline and online and has mobile apps.
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.
Berty is an open source messenger app that works with or without an internet connection, and has Android and iOS apps. As it’s peer-to-peer there’s no server component.
Not a lot but we have used it. It’s beta quality. You need to be in Bluetooth range if there’s no internet - and it works. Good for tent-to-tent texting.