Cheap alarm solution?

[Partybug (Scott)]

@Jiran There is a forum on 1technophile’s gateway below. There are several of us who use it with great results.

433toMQTTto433 Bidirectional Arduino Gateway

*Not sure if this is the right forum Here is what I built: I did this for two reasons: 1. A gateway to control the cheap 433mhz Etekcity remotes from Hass and 2. To have the ability to “report” back to Hass when a user pushes the button on the remote. I currently enjoy controlling the switches from Hass via MQTT, but I don’t know how to get Hass to listen to a MQTT topic (home/433toMQTT) to change the status of the switch. First hurdle is that the MQTT message going back to Hass is the co…