Hi! I am thinking of creating a custom alarm system based on two olimex esp32 poe ethernet boards (in two different rooms). It would be great to have both connected to home assistant via (Po)Ethernet, but still having a direct connection with each other (I thought about Espnow), so that they can manage the alarm system (sensors + actuators) even with no LAN nor home assistant available. Do you think this is achievable?
I don’t think much has changed since this discussion:
The gist was that it can be done, but not with ESPHome - it would be more roll your own MQTT solution to connect to HA.
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That’s sad, because the esphome component for alarm is very handy and integrates wonderfully in HA…
Thank you for the fast reply though.
There is more than one implementation of esphome/espnow. Keep looking 
Do you have any specific advise?
Search the forum for espnow
Pointers would be nice because I couldn’t find much more relevant that the one I linked… If you have a better one let us know.
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