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Xiaomi GZCGQ01LM in Home Assistant

Climate sensors · Zigbee · Mi light sensor

Zigbee2MQTT Quirk included in ZHA 2 open reports

This device is known to both Zigbee integrations: Zigbee2MQTT has a definition for it, and ZHA has a quirk that adapts it.

We have a detailed page on this device with compatibility ratings and prices. Details and compatibility

Facts about this device

Brand
Xiaomi
Model
GZCGQ01LM
Device type
Climate sensors
Radio
Zigbee
Power
Battery
Reports itself as
lumi.sen_ill.mgl01
Also sold as
Xiaomi YTC4043GL
Zigbee2MQTT
Device page on zigbee2mqtt.io

How the device gets into Home Assistant

  • official ZHA – with a Zigbee coordinator and the ZHA integration; the quirk the device needs is part of ZHA. Integration
  • add-on Zigbee2MQTT – Zigbee2MQTT runs as an add-on and passes the device on to Home Assistant over MQTT. Integration · Source

Known problems and fixes

Open problems

  • open If you have a Xiaomi GZCGQ01LM light sensor, the battery percentage is always unknown. This issue needs fixing to show accurate battery levels. since October 29, 2026 · zha-device-handlers #5612
  • open The Xiaomi GZCGQ01LM sensor incorrectly reports a CR2032 battery instead of CR2450. Fixing this would show the correct battery type in Home Assistant. since July 21, 2026 · zha-device-handlers #5192

Changes proposed for ZHA

  • pull request If you have a Xiaomi GZCGQ01LM light sensor, the battery percentage may show as unknown. This change would correct the battery level display. since October 29, 2026 · zha-device-handlers #5613
  • pull request A pull request seeks to adjust the battery size reporting for the Xiaomi Mi light sensor GZCGQ01LM to provide more accurate battery level information. since October 29, 2026 · zha-device-handlers #5609

ZHA quirks for this device

Quirk included in ZHA Recommended quirk

Part of ZHA – Home Assistant uses it on its own, nothing to install.

Source: zha-device-handlers · since zha-quirks 2.2.2
Signature: LUMI / lumi.sen_ill.mgl01

5 more quirks for this device

All quirks in the ZHA quirk database →

Alternatives

The same job from other makers – devices of the same type and radio that work with Home Assistant too.

Sources: Zigbee2MQTT, ZHA quirks, Z-Wave JS, the Matter certification database, Shelly, ESPHome, Tasmota, Tuya Local and the issue trackers on GitHub. Reports are assigned to a device by the identifiers they contain; the sentences come from the integration pages, where a language model writes them from the titles.

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