What is Doorman?

Doorman allows you to connect your TCS or Koch intercom to any home automation system. Additionally, some rebranded Niko and Scantron intercoms are counterparts to the TCS and Koch models.

What about other intercoms?

Doorman isn't limited to TCS or Koch intercoms.
You can use it to simulate a button press to trigger a door opener or light with the integrated solid-state relay (up to 40V, max 2.5A).

If your intercom operates on a 2-wire bus within the 14-24V DC range, it might be possible to implement other protocols as well.

You can also monitor the voltage level on older intercoms (14-24V DC) using the internal ADC and trigger specific actions based on the readings.

Just received your Doorman? Jump to the Quickstart guide.

Features

• Powered by ESP32-S3
• USB-C port for easy flashing (and because USB-C is cool 😎)
• Compact design that fits almost anywhere
• Configurable WS2812B RGB LED to indicate specific events
• Two additional GPIOs for easy expansion with your own sensors and devices (e.g., I²C)
• Solid-state relay for switching up to 40V (max. 2.5A), ideal for older intercom systems
• External Button (G + BTN)
• Bridge rectifier for bus-wire input to correct polarity
• TCS bus communication for functions like opening the front door and detecting the doorbell
• Can be used as a Nuki Bridge with the Nuki Bridge Firmware. Note that this firmware is incompatible with the Nuki app, but it works with the Home Assistant app.

Interested in Buying One?

Feel free to contact me on Discord or via E-Mail.

I offer fully assembled and tested Doorman-S3 units with the Stock Firmware pre-installed, ready for direct integration and adoption into Home Assistant.