13 August 2025 Reading time: 2 minutes

I have an Hoermann garage door (Promatic 4), and I needed to integrate in my HomeKit, via Homebridge.
Looking for possible solutions I have discovered this nice project on Github: HCPBridgeMqtt
Built a custom PCB, programmed the firmware on the ESP32 and everything is neat. Except a few issues that I have corrected modifying the original code. In a nutshell, an extra "door_state" topic that would make the mqttThing Homebridge plugin happier and retain on the published topic so the garage door status will be accurate when the Homebridge restarts.
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