Problem:
5 or 6 fire doors, with 24v magnet door holder, zigbee relay spread out in an apartment building that I am hoping to build and manage through HA. As long as all doors close in case the HA server goes down the fire regulations inspector will give his go-ahead with my plan.
…so how do I achieve this redundancy? Initially I was thinking some hardware setup with timed relay or what not - but now I think I should be able to set this up through another server instance of HA? That pings the original server and takes action if it does not receive answer.
How would you go about it?
Background:
I’m not forced by regulation to install a central fire alarm system, I only need active doors that are hooked up to one smoke detector on each side of the door. But by building this through HA I hope to be able to build a central system, cheaper, that will close all fire doors in the building upon smoke. This will be my first project in HA.