I’ve got two properties, the one I live in and another which is currently vacant.
I’ve got two seperate Home assistant servers running, one at each and a site to site VPN set up between them.
It would be handy if I could share some sensor data between instances. I had considered using a shared MQTT server but the problem here is if the internet goes down the other property will loose control of anything using MQTT (Tasmota for example)
As an example It was my intention to set up a phone notification for when a tasmota device turned on at the remote property and was on for more than an hour.
It would also be useful to see sensor data from the remote property in my main home assistant app on my phone, currently the only way I can do this is to use a web browser and log into it that way.
Anyone done anything similar or have any suggestions?