homeassistant

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Home Assistant is open source home automation that puts local control and privacy first.
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Has anyone tried to let 2 homes communicate with each other? (lemmy.world)

submitted 2 years ago by Gompje@lemmy.world to c/homeassistant@lemmy.world

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Disclaimer: I haven’t done a lot of research yet. Still in the “how to handle this” stage.

My profile: Senior Full Stack Web App - with own infrastructure in the cloud, unraid locally. HASSOS in a vm.

Q: in September I’m getting solar panels. My parents lended me the money on the condition they can use up the extra energy I set the net. We live in Belgium and that is possible but to do so they have to take it at most 15 minutes after. For normal usage this is fine but I’m talking heat pump and machines and such.

Both houses have a home assistant setup. His is even more automated than mine. Both run on on a decent machine. Both have stable internet (UniFi) and he is paying for home assistant cloud. Atm I am not.

Now I do have a digital meter and just integrated that with my instance. First I made my own cable but then I stumbled upon “slimmelezer+” module and that thing is just fantastic!

Anyway now I have access to real time data. What would you do to get it to the other instance? I do not have a lot of time but I am experienced with webservices and have the servers. This would be read only off course! lol but I was wondering if any of you knew a project or has done this him/herself.

I’m thinking the easiest way would be for me to pay for cloud access and then create a user for them. They can then add my home to their apps. But it would be super duper sweet to fully integrate both houses!

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[–] TimeWalker@lemmy.foxden.party 1 points 2 years ago

What you could do is have one of the HAs install the custom integration remote-homeassistant. However, even then it would mean that you have to somehow make your instance available outside e.g. VPN, port forwarding, cloud service, ...

This one connects with the instance directly via a long-lived token and allows you to control and read date from the other instance. The good thing though: The configuration.yaml way allows you to specificially include or exclude entities. So with that you could technically only send the entities from slimmelezer+ without having to pass the other info.

I would say the only caveat would be that because the long-lived token is somewhere on the other house's instance, they could technically take it and send commands randomly to your instance :P Maybe with an extra user you could maybe limit the permissions or something similar and create the long-lived token there - haven't tried it though, just a thought.