Ongoing discussion about this feature can be found here: https://github.com/Koenkk/zigbee2mqtt/issues/782
Zigbee has support for binding which makes it possible that devices can directly control each other without the intervention of zigbee2mqtt or any home automation software.
When to use this #
A use case for this is e.g. the TRADFRI wireless dimmer. Binding the dimmer directly to a bulb or group has the following advantages:
- Smoothness; this will greatly improve the dimming feedback as the dimmer directly dims the bulb and thus does not have to make the MQTT/home automation software roundtrip.
- It will work even when home automation software, zigbee2mqtt or the coordinator is down.
Binding can be configured using the following topics:
TARGET_DEVICE_FRIENDLY_NAMEwill bind the source device to the target device or target group. In the above example, the TRADFRI wireless dimmer would be the source device and the bulb the target device. When using a group as target, using the group’s friendly name is mandatory, group ID will not work.
TARGET_DEVICE_FRIENDLY_NAMEwill unbind the devices.
Binding specific endpoint #
This is not applicable for most users
By default, the first endpoint is taken. In case your device has multiple endpoints, e.g.
right. The following can be done to specifcy an endpoint:
- Source: append the endpoint friendly name to the topic, e.g.
- Target: append the endpoint friendly name to the payload, e.g.
Binding a group #
Steps to bind switch with groups, which some devices like IKEA E1743 require:
- Make a group to which you want to add your device(s) and light(s) in
configuration.yaml, and give it a
friendly_name. See https://www.zigbee2mqtt.io/information/groups.html.
- Make sure both the switch and devices are paired with your Zigbee2mqtt coordinator and send MQTT commands:
DEVICENAME(repeat for multiple devices)
- If this doesn’t work, send MQTT commands again and if that doesn’t work, reset switch and light and try again.
Not all devices support this, it basically comes down to the Zigbee implementation of the device itself. Check the device specific page for more info (can be reached via the supported devices page)
When using this feature you are probably also interested in using the report feature. This allows you to get state changes when e.g. a bulb state changes by a bound dimmer. Read more about it here Report.