Best way for HA 1 to talk to HA 2?

Configuration
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i installed HA at my mom’s house for water leaks, CO, fire and various sensors. i get telegram if any sensor gets tripped. but sometimes i dont look at my phone. is there any way for her HA to talk to my HA so that i can see my lights blinking or siren go on?
so far, i can only think of via emails. HA mom send email. my HA listens to that email and turn on the siren. is there an even better way?

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or:

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I agree with @finity

I am using the Remote Homeassistant integration from HACS to link HA in our 2nd home to the HA running in our main home.

I use Node-red for my automations and can trigger alerts on my mobile HA app as well as alerts on my wall mounted tablet when something happens at the remote location.

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it looks really complicated. i am trying to find a YT guide on how to do it now. thanks!

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what’s the best way to connect to the remote node without port forwarding? image

as of now, i have to manually turn on VPN to connect to the remote site. but that would not work for this Remote add on unless i leave VPN on 24/7

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I am using Nabu Casa in both locations. I use the Nabu Casa URL for the secondary home in the setup of in the setup dialog on the primary HA. I also use port 443. (Note that this requires 2 separate Nabu Casa accounts)

The instructions are not detailed, step by step. You do need to fill in some gaps. Not a criticism of the author as it is free and works great.

The access token is generated in the secondary home assistant, under your user account in the right-hand panel on the HA webpage. Copy it down when it is displayed. Once you leave that dialog you cannot display it again.

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I’ve done this without Nabu Casa nor port forwarding by running the ZeroTier add-on on both instances. Once both are connected to the ZeroTier network, they can see each other for remote-homeassistant to work.

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9

this is amazing!!! thank you

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what’s the trick to installing ZeroTier? i dont see it anywhere. even when i typed in the Search box at the top

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11

ok, i had to add this repo in https://github.com/hassio-addons/repository

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12

finally got everything working. not too painful.
thanks everyone! this is truly impressive how it works with ZeroTier!!!

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