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OXT SWTZ21 in Home Assistant

Wall switches · Zigbee · 1 gang switch module

Zigbee2MQTT Quirk proposed, not merged yet 3 open reports

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

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

Brand: OXT
Model: SWTZ21
Device type: Wall switches
Radio: Zigbee
Power: Mains powered
Same device as: Tuya TS0001_switch_module
Also sold as: AVATTO ZBTS60-01, AVATTO ZWSM16-1, AVATTO ZWSM16-DC-1, Moes ZM-104-M, Moes ZM4LT1, Nous B6Z
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

Open problems

open Upgrading Home Assistant may cause duplicate switch entities for smart relays, leading to confusion in automation. since February 5, 2026 · zha-device-handlers #4722
open TS0001 and TS0002 devices show zero power usage in Home Assistant due to a bug. Fixing this would enable accurate power measurement reporting for these devices. since October 15, 2024 · zha-device-handlers #3427

Requests for ZHA support

support requested A device support request is open, but the specific device details are missing. This entry seeks to add support for an unspecified Zigbee device. since May 25, 2026 · zha-device-handlers #5030

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: External switch type

Source: zha-device-handlers · pull request #5188 · by @kugaevsky · July 21, 2026
Signature: _TZ3000_tqlv4ug4 / TS0001

1 more quirk for this device

Quirk proposed, not merged yet _TZ3000_prits6g4 / TS0001 zha-device-handlers · pull request #5188 · by @kugaevsky · July 21, 2026

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 →

Alternatives

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

Tuya TS0001_switch_module Wall switches · Zigbee · 1 gang switch module Zigbee2MQTT Custom quirk needed 3 open reports Review
Aqara SSM-U01 Wall switches · Zigbee · Single switch module T1 (with neutral) Zigbee2MQTT ZHA quirk 2 open reports Review
SONOFF ZBMINIR2 Wall switches · Zigbee · Zigbee smart switch Zigbee2MQTT ZHA quirk 2 open reports Review
AduroSmart 81849 Wall switches · Zigbee · ERIA Built-in Dimmer Zigbee2MQTT Review

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.