IKEA
IKEA MYGGBETT Door/Window Sensor
- Thread
- Matter
Verified September 2026
At £7 from IKEA UK, this 2026 Matter-over-Thread sensor (successor to the Parasoll) is the cheapest way to cover every door and window in the house, joining Home Assistant's native Matter integration without an IKEA hub. It's genuinely discreet — 82×17×18mm, mounted with adhesive pads rather than screws, so it disappears against a white door frame. Against the Aqara Door and Window Sensor P2 (£27, officially certified Works with Home Assistant), MYGGBETT is under a third of the price for the same contact-and-battery entities. Budget buyers should start here — but read the latency note below before trusting it for anything security-critical; Aqara's mesh reports state changes more consistently.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| Contact | Binary sensor | Open/closed state of the two-part magnetic sensor, delivered via Matter's contact cluster — the primary automation trigger. |
| Battery | Sensor (%) | Battery charge read from the Matter power-source cluster; sanity-check against a physical battery swap given reported percentage-accuracy issues on some Matter devices. |
| Battery low | Binary sensor | Low-battery flag derived from the power-source cluster's charge-level state; fires independently of the percentage sensor and is the more reliable trigger for a replace-battery automation. |
HA's Matter integration exposes MYGGBETT as a contact binary sensor plus a battery percentage sensor rather than only a low-battery boolean, so you can graph the actual drain curve instead of waiting for a threshold flag. Community threads flag it as a genuinely sleepy Thread end device: users report it going unresponsive for 15-20 minute stretches, traced to Thread RF sensitivity rather than the sensor itself. The reported workaround is adding a mains-powered Thread router nearby, since as a battery device MYGGBETT doesn't extend the mesh itself — its Zigbee predecessor Parasoll, riding a mesh that mains devices do extend, tends to report state changes more consistently. Given that latency, treat it as a status sensor for slower automations (long-open-window alerts, heating cutoff) rather than anything needing sub-minute reaction.
Specs
- weight
- 0.04 kg
- battery
- 1x AAA rechargeable (HR03 1.2V); IKEA recommends LADDA rechargeable, sold separately
- material
- ABS plastic
- mounting
- Adhesive pads or screws (base plate); magnet is adhesive-only
- ip rating
- None listed (indoor use only)
- dimensions
- 82 x 17 x 18 mm (sensor unit)
- detection gap
- Max 5 mm between sensor and magnet for reliable triggering