Hi everyone,
I’m running Home Assistant (Core 2025.6.3) with Zigbee2MQTT (2.4.0), and I’m trying to expose a “proxy” Light entity that reads from the real endpoint rather than the default topic keys. My goal is to map state_1
→ state
and brightness_1
→ brightness
, since that for some reason is how the device reports the state and brightness (although commands to change them are still published to state
and brightness
)
The problem is that both state and brightness remain “unknown” when inspecting the state of the proxy.
I’ve distilled my config to this:
mqtt:
light:
- name: kph_valokatto_proxy
unique_id: kph_valokatto_proxy
# Read the “real” state & brightness from keys 1
state_topic: "zigbee2mqtt/kph_valokatto"
state_value_template: "{{ value_json.state_1 }}"
brightness_state_topic: "zigbee2mqtt/kph_valokatto"
brightness_value_template: "{{ value_json.brightness_1 | int }}"
# Command on/off & brightness to the normal Zigbee2MQTT set topic
command_topic: "zigbee2mqtt/kph_valokatto/set"
payload_on: '{"state":"ON"}'
payload_off: '{"state":"OFF"}'
brightness_command_topic: "zigbee2mqtt/kph_valokatto/set"
brightness_command_template: '{"brightness": {{ brightness }} }'
Here is an example MQTT message when I turn the light off
{"brightness":51,"brightness_1":254,
"color":{"h":205,"s":75,"x":0.2119,"y":0.2828},
"color_mode":"xy","color_temp":133,"effect":null,
"linkquality":124,"power_on_behavior":null,
"state":"OFF","state_1":"OFF"}
Observed in Developer Tools → States for kph_valokatto_proxy
The state is “unknown”, and the state attributes are:
supported_color_modes:
- brightness
friendly_name: kph_valokatto_proxy
supported_features: 0
color_mode: null
brightness: null
If I add json_attributes_topic: "zigbee2mqtt/kph_valokatto"
to the config of the proxy, I do get a bunch of state attributes, including state_1 and brightness_1 that I see in the states for kph_valokatto_proxy, but the “state” and “brightness” always remain unknown.
Any idea what could be wrong? Why does the state and brightness of kph_valokatto_proxy not update?