WXKG11LM-T1

1. Overview

The Aqara Wireless Mini Switch T1 (model WXKG13LM, retail SKU WB-R02D) is a compact, battery-powered Zigbee 3.0 wireless push-button made by Lumi United Technology Co. Ltd. under the Aqara brand. It is the Zigbee 3.0 successor to the original Wireless Mini Switch (WXKG11LM), sharing the same 45 × 45 × 12 mm square form factor but adding OTA firmware updates, standard Zigbee cluster support, and broader ecosystem compatibility including Matter (via hub bridge). The T1 carries Zigbee 3.0 certification (cert ID ZIG18168ZB330216-24, issued November 2018) and is also sold as the Yandex YNDX-00524. It requires no wiring, adheres to any surface, and uses a single CR2032 cell rated for up to 2 years of use and up to 50,000 presses.

2. User Sentiment

Community reception is broadly positive for use cases within the Aqara ecosystem or with Zigbee2MQTT, but ZHA (Zigbee Home Automation) support has been a significant pain point. Multiple HA community threads and a GitHub core issue (#103265) document the T1 (lumi.remote.b1acn02) pairing successfully under ZHA but then acting as a "dumb device" — only an Identify button visible, no action events firing. A fix was merged into zigpy/zha-device-handlers in PR #2871 (release 0.0.119), after which users confirmed functionality. Even after the fix, users on SkyConnect+ZHA combinations still report pairing failures and timeout errors during node discovery. The unanimous successful workaround is switching to Zigbee2MQTT, which is praised as "more work to configure, but functional." Users on Z2M consistently find the device reliable, with battery life matching the 12–24 month community estimate. One reported quirk: the quadruple-click action (action:quadruple) is not transmitted by some units even though it appears in Z2M's documented action list — the issue was closed as not planned by the Z2M maintainers. The original WXKG11LM is similarly popular but only exposes triple/quadruple on certain hardware revisions; the T1 is considered a more consistent upgrade.

3. Real-World Applications

The Mini Switch T1 is used almost exclusively in residential smart-home scenarios as a scene controller and light switch supplement. Common configurations include: single press to toggle lights, double press to activate a "goodbye" scene (lights off, lock engaged, security armed), and long press for an emergency alert notification via the Aqara hub. Users also deploy it as a wireless doorbell (hub speaker announces visitor) and as a bedside scene controller. It is positioned and sold as a no-drill, stick-anywhere solution for adding smart-home control to any location without rewiring. The device is available globally through Aqara's retail channels, Best Buy (USA, ~$16.99), Walmart, Kmart, and European retailers (~£15.29 UK).

4. Technical Specifications

• Type: Zigbee 3.0 wireless push-button (single button)
• Model Numbers: WXKG13LM / WB-R02D (also Yandex YNDX-00524)
• Zigbee ID: lumi.remote.b1acn02
• Dimensions: 45 × 45 × 12 mm (1.77 × 1.77 × 0.47 in)
• Weight: 64 g
• Battery: CR2032 (rated ~2 years / up to 50,000 presses)
• Protocol: Zigbee 3.0 (2.4 GHz, 2400–2483.5 MHz)
• Press Actions (Z2M): single, double, triple, quadruple, quintuple, hold, release, many
• Press Actions (Official/Aqara hub): single, double, long press
• OTA: Yes (supported in Zigbee2MQTT)
• Operating Temperature: 0°C to 50°C
• Operating Humidity: 0–95% RH, non-condensing
• Material: V-0 flame-retardant polycarbonate
• Mounting: Adhesive sticker (included), or freestanding
• Exposed Properties (Z2M): battery %, voltage (mV), action events

5. Ordering & Compatibility

The T1 retails for approximately $16.99 USD (Best Buy, Walmart) and £15.29 in the UK. It is also available on AliExpress. Compatible with Apple HomeKit, Amazon Alexa, Google Home, Samsung SmartThings, and IFTTT — all require an Aqara Hub (M1S, M2, G2H, G3, E1, or equivalent). Matter support is available via Aqara hubs running firmware 4.0.0+, with the M2 being the first confirmed. For hub-free use, the device pairs directly with any Zigbee 3.0 coordinator via Zigbee2MQTT or ZHA (ZHA support requires zha-device-handlers ≥ 0.0.119). The predecessor WXKG11LM (lumi.remote.b1acn01 / lumi.sensor_switch.aq2) remains widely compatible but lacks OTA and exposes fewer actions on older revisions.

6. Known Issues

ZHA compatibility was broken at launch for WXKG13LM: the device paired but triggered no action events — fixed in zigpy/zha-device-handlers PR #2871 (release 0.0.119), though pairing timeouts on SkyConnect remain reported by some users. The quadruple-click action (action:quadruple) is not reliably transmitted by all hardware units and was closed as not planned by Z2M maintainers. Xiaomi/Aqara Zigbee devices are generally sensitive to router-device compatibility — Centralite, General Electric, and Ledvance routers are documented causes of disconnections; using Zigbee 3.0 routers resolves this. Home Assistant blueprint automations using WXKG11LM may break on HA 2025.3.3+ due to domain/attribute changes requiring updates from state-based to event-based triggers.