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I bought the cheapest compatible BTicino intercom device (BT 344232 for 32 €) that I could find on eBay, then soldered in 4 wires and added microcontrollers to make it smart. It now connects to my Nuki Opener Smart Intercom IOT device, and to my local MQTT Pub/Sub bus (why not?). Background In my last post about the BTicino intercom from November, I described how to use a Teensy microcontroller to reliably interpret SCS bus signals and drive a Nuki Opener (Smart Intercom). Originally, I had hop...