Slacky-DIY THERM_SLACKY_DIY_R09 with Zigbee2MQTT and Home…

What it exposes

Feature	Property	Values	Control
Child lock	child_lock	—	settable
Mode child lock	mode_child_lock	—	settable
Relay type	relay_type	—	settable
Programming operation mode	programming_operation_mode	setpoint, schedule	settable
Sensor	sensor	Inner (IN), All (AL), Outer (OU)	settable
Hysteresis temperature	hysteresis_temperature	°C · 1…5	settable
Min heat setpoint limit	min_heat_setpoint_limit	°C · 5…15	settable
Max heat setpoint limit	max_heat_setpoint_limit	°C · 15…45	settable
Frost protect	frost_protect	°C · 0…10	settable
Heat protect	heat_protect	°C · 25…70	settable
Brightness (day)	brightness_day	0…8	settable
Brightness (night)	brightness_night	0…8	settable
Eco mode	eco_mode	—	settable
Eco mode heat temperature	eco_mode_heat_temperature	°C · 5…45	settable
External temperature calibration	external_temperature_calibration	°C · -9…9	settable
Outdoor temperature	outdoor_temperature	°C	read only
Climate	local_temperature, occupied_heating_setpoint, local_temperature_calibration, system_mode, running_state, schedule	room temperature, heating setpoint, local_temperature_calibration, mode, running state, schedule	settable
Settings reset	settings_reset	Default	settable

MQTT: state and commands

Zigbee2MQTT publishes the device state to zigbee2mqtt/my_device (my_device is the name you give the device). An example message:

{
  "child_lock": false,
  "mode_child_lock": false,
  "relay_type": false,
  "programming_operation_mode": "setpoint",
  "sensor": "Inner (IN)",
  "hysteresis_temperature": 3,
  "min_heat_setpoint_limit": 10,
  "max_heat_setpoint_limit": 30,
  "frost_protect": 5,
  "heat_protect": 48,
  "brightness_day": 4,
  "brightness_night": 4,
  "eco_mode": false,
  "eco_mode_heat_temperature": 25,
  "local_temperature": 20.5,
  "occupied_heating_setpoint": 21,
  "system_mode": "heat",
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"occupied_heating_setpoint":21.5}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"system_mode":"heat"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"child_lock":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"mode_child_lock":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"relay_type":true}'

Watch the topics live from the browser: MQTT client.

Home Assistant automation example

Zigbee2MQTT creates Home Assistant entities from the device name. If it is called my_device, an automation in automations.yaml can look like this:

- alias: "Cooler at night"
  mode: single
  triggers:
    - trigger: time
      at: "23:00:00"
  actions:
    - action: climate.set_temperature
      target:
        entity_id: climate.my_device
      data:
        temperature: 18

Check the YAML: YAML checker.

How to pair it

In Zigbee2MQTT click Permit join.
Put the device in pairing mode: usually a long press of the reset button (5–10 s) until the LED blinks; bulbs: switch the power off and on 5–6 times.
Keep the device close to the coordinator or a router while pairing.
Give it a clear name: MQTT topics and Home Assistant entities are built from it.

Exact procedure and model notes: the device page in the Zigbee2MQTT docs. No coordinator yet: coordinator picker.

Slacky-DIY THERM_SLACKY_DIY_R09

What it exposes

MQTT: state and commands

Home Assistant automation example

How to pair it

Similar devices

More tools: smart home