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Bosch Radiator Thermostat II [+M]

With Zigbee2MQTT, this TRV exposes a writable pi_heating_demand entity. VTherm can use it for self-regulation by direct valve control. In Matter mode, pi_heating_demand is read-only: use the Zigbee mode.

Limitations

  1. About 15 minutes after the last command, the TRV goes back to its own internal algorithm. An automation that sends the last pi_heating_demand value again at regular intervals keeps the valve under VTherm control.
  2. When turned off, the TRV sets a 5 °C setpoint.
  3. Water flows only above about 15 % of opening: adjust the minimal opening to your radiator.

NOTE

Because of these limitations, this device is partially compatible.

Device configuration

Initialization

Go to your settings, then integrations, then click on add a new integration. Search for Versatile Thermostat.

Click on Thermostat over another thermostat.

Basic attributes

Go to the "Main attributes" section.

  1. Choose a name for your thermostat
  2. Set the temperature sensor for your room
  3. If you are using the Zigbee protocol and you have a "last_seen" entity for your temperature sensor, fill it in.

You can validate and return to the configuration menu.

Underlying entities

Go to the underlying entities section.

  1. Add the thermostats that will be controlled
  2. In the auto-regulation section, choose "direct valve control"

You can validate and return to the configuration menu.

Community references