How to start calibration of the Light/shutter control unit II ?

[michaelmell]

I have the Light/shutter control unit II, which I am operating in shutter mode to control my roller shutter:

https://www.zigbee2mqtt.io/devices/BMCT-SLZ.html

This device supports automatic calibration of endpoints. (See e.g. this video (in german), which how this is activated with the Bosch Hub and Mobile App.)

However, I do not know how to activate this with Zigbee2MQTT.

I see that there are calibration-related settings, but there is now button/action to start the calibration (see screenshot and copied states below).

Is it possible to start the calibration with Z2M?

My setup:

• Home Assistant 2025.10.3
• Z2M 2.6.2
• All running with HAOS on a RasPi 4

Here are the exposed properties in Z2M:

Here are the states:

{
    "auto_off_enabled_left": "OFF",
    "auto_off_enabled_right": "OFF",
    "auto_off_time_left": 0,
    "auto_off_time_right": 0,
    "calibration_button_hold_time": 0.1,
    "calibration_closing_time": 90,
    "calibration_motor_start_delay": 2,
    "calibration_opening_time": 90,
    "child_lock": "OFF",
    "child_lock_left": "OFF",
    "child_lock_right": "OFF",
    "device_mode": "shutter",
    "energy": 0.02,
    "last_seen": "2025-10-18T18:22:00+02:00",
    "linkquality": 83,
    "motor_state": "stopped",
    "position": 100,
    "power": 0,
    "power_on_behavior_left": "off",
    "power_on_behavior_right": "off",
    "state": "OPEN",
    "state_left": "ON",
    "state_right": "ON",
    "switch_mode": "coupled",
    "switch_mode_left": "coupled",
    "switch_mode_right": "coupled",
    "switch_type": "none",
    "tilt": 100,
    "update": {
        "installed_version": 555248176,
        "latest_version": 555248176,
        "state": "idle"
    },
    "reset_energy_meters": null
}

[DerDreschner]

@michaelmell : The BMCT-SLZ support an automatic calibration process, but it's not being implemented / exposed in Z2M. I don't have an BMCT-SLZ here right now and would need to lend a shutter motor to support that as well.