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COOLO CS-201Z in Home Assistant

Climate sensors · Zigbee · Soil moisture sensor

Zigbee2MQTT Quirk proposed, not merged yet 2 open reports

Zigbee device – see the note above on what ZHA needs for it.

Brand: COOLO
Model: CS-201Z
Device type: Climate sensors
Radio: Zigbee
Power: Battery
Reports itself as: ZG-303Z, AY-303Z, AY-302Z, _TZE200_npj9bug3, _TZE200_wrmhp6b3, AOYAN
Also sold as: AOYAN AY-302Z, AOYAN AY-303Z
Zigbee2MQTT: Device page on zigbee2mqtt.io

How the device gets into Home Assistant

official ZHA – with a Zigbee coordinator and the ZHA integration; for all its functions it needs a custom quirk, see above. 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

Requests for ZHA support

support requested Someone asked ZHA to support this device or one of its functions. since June 23, 2025 · zha-device-handlers #4144
support requested Someone asked ZHA to support this device or one of its functions. since June 11, 2025 · zha-device-handlers #4122

Changes proposed for ZHA

pull request A change to ZHA for this device has been proposed and is waiting for review. since January 30, 2026 · zha-device-handlers #4706
pull request A change to ZHA for this device has been proposed and is waiting for review. since November 29, 2025 · zha-device-handlers #4536
pull request A change to ZHA for this device has been proposed and is waiting for review. since July 2, 2025 · zha-device-handlers #4160

ZHA quirks for this device

Quirk proposed, not merged yet Recommended quirk

Proposed to ZHA and waiting for review – the maintainers check it before it becomes part of Home Assistant.

Adds: Temperature report interval Humidity report interval Display unit Temperature alarm Alarm temperature max Alarm temperature min Temperature sensitivity Humidity alarm Alarm humidity max Alarm humidity min +8

Source: zha-device-handlers · pull request #4160 · by @makuser · July 2, 2025 · 8 approvals
Signature: _TZE200_npj9bug3 / TS0601

8 more quirks for this device

Quirk proposed, not merged yet _TZE200_npj9bug3 / TS0601 zha-device-handlers · pull request #4941 · by @delneet · April 22, 2026
Quirk proposed, not merged yet _TZE200_wrmhp6b3 / TS0601 zha-device-handlers · pull request #4941 · by @delneet · April 22, 2026
Quirk proposed, not merged yet _TZE200_npj9bug3 / TS0601 zha-device-handlers · pull request #4706 · by @gcosta74 · January 30, 2026
Quirk proposed, not merged yet _TZE200_npj9bug3 / TS0601 zha-device-handlers · pull request #4536 · by @nschimme · November 29, 2025 · 4 approvals
Quirk proposed, not merged yet AOYAN / AY-303Z zha-device-handlers · pull request #4536 · by @nschimme · November 29, 2025 · 4 approvals
Custom quirk shared in an issue _TZE200_npj9bug3 / TS0601 zha-device-handlers · issue #4122 · by @JustReit · November 7, 2025 · 1 approval
Custom quirk shared in an issue _TZE200_npj9bug3 / TS0601 zha-device-handlers · issue #4122 · by @makuser · July 22, 2025
Custom quirk shared in an issue _TZE200_npj9bug3 / TS0601 zha-device-handlers · issue #4122 · by @GWRon · June 18, 2025 · 1 approval

The quirk is not part of ZHA yet. You can use it as a custom quirk until it is:

Tell ZHA where custom quirks are kept – in configuration.yaml:
```
zha:
  custom_quirks_path: /config/custom_zha_quirks/
```
Create that folder and save the quirk as a .py file in it.
Restart Home Assistant. If the device was paired before, reconfigure it or remove and pair it again so the quirk is applied.
Check it worked: the device page shows the quirk under Zigbee info.

A custom quirk has not been reviewed by the ZHA maintainers. Delete the file once the quirk is part of a Home Assistant release – otherwise the old copy takes precedence.

All quirks in the ZHA quirk database →