Aqara Door and Window Sensor P2 comes in Zigbee and Matter versions, both detecting open/close status. This guide covers detection and connectivity issues.
Common Symptoms
- Sensor not detecting door/window open or close
- Status stuck on open or closed
- Automations not triggering
- Sensor showing offline
- Delayed status updates
Installation Check
1. Verify Magnet Alignment
- Gap between sensor and magnet should be under 22mm when closed
- Alignment marks on both pieces should face each other
- Both pieces should be parallel and level
- Test by removing magnet—status should change to open
2. Mounting Surface
- Clean surface before applying adhesive
- For metal frames, gap may need to be smaller
- Allow 24 hours for adhesive to cure
- Use included screws for heavy-use doors
Testing Detection
- Open app and view sensor status
- Slowly open the door/window
- Status should change within 1-2 seconds
- If no change, check magnet placement
Zigbee Version Troubleshooting
Connection Issues
- Check Aqara hub is online
- Verify sensor is within range (add repeaters if needed)
- Check for Zigbee interference from WiFi
- Remove and re-pair sensor
Re-Pair Zigbee Sensor
- Remove from Aqara Home app
- Press and hold reset button until LED flashes
- Add device in app immediately
- Keep within 2 meters of hub during pairing
Matter Version Troubleshooting
Thread Network
- Ensure Thread border router is online
- Check Thread network status in Home app
- Add Thread router devices to extend coverage
Multi-Controller Setup
For using with multiple ecosystems:
- Set up with primary controller first
- Enable sharing in controller settings
- Generate sharing code
- Add to secondary controllers (HomeKit, Google, Alexa)
Battery Replacement
- P2 uses CR1632 battery
- Expected life: 2 years typical use
- Replace when app shows low battery
- Use quality batteries for best life
Automation Issues
If sensor works but automations don't trigger:
- Verify automation is enabled
- Check trigger conditions (open vs closed)
- Look for conflicting automations
- Test automation with manual trigger if possible
When to Contact Support
Contact Aqara support if:
- LED doesn't light when pressing reset
- Battery drains within weeks
- Sensor housing is cracked or damaged
- Persistent detection failures after reinstall