March 25, 2026 – IKEA VALLHORN Now Supported by Zigbee2MQTT
The IKEA VALLHORN wireless motion sensor (model E2134) has been added to the Zigbee2MQTT compatibility list, enabling seamless integration with Home Assistant and other open-source smart home platforms. [citation:5]
The VALLHORN sensor exposes occupancy, illuminance, battery, and voltage states through the Zigbee2MQTT interface. It pairs with Zigbee coordinators by pressing the pair button 4 times, with a red LED indicating pairing status.
Exposed Data Points:
- Occupancy (binary) – indicates motion detection
- Illuminance (numeric, unit: lx) – measured ambient light level
- Battery (%) – remaining battery level
- Voltage (mV) – reported battery voltage
The sensor features a built-in lux sensor that saturates at 1364 lx, meaning any incident light above this level will still be reported as 1364 lx. This is important for outdoor deployments where direct sunlight or bright overcast conditions are common. [citation:5]
For users experiencing issues with 1.5V alkaline batteries, community testing has shown that using 1.2V rechargeable batteries resolves many connectivity and false-positive detection problems. A hardware modification using a diode (such as MBR0520) can also reduce battery voltage for more reliable operation. [citation:5]
The VALLHORN supports OTA (Over-The-Air) firmware updates, and the Zigbee2MQTT integration includes configurable options such as illuminance calibration, identify timeout, and no_occupancy_since reporting intervals.
Availability: The IKEA VALLHORN is available through IKEA stores and website, priced at approximately $14.99 / €14.99.