Unable to add additional Aqara P2 Sensors Matter/Thread

Configuration Matter/Thread
1

I already have two Aqara P2 Door and Window Sensors connected and working; I have notifications setup for when sensors are opened and they work without issue. I added these several months ago and have finally gotten around to getting a few more. However, when I try to add the additional sensors I get a “Home couldn’t connect to this accessory.” error message. I’ve checked the logs and when I attempt to add the device I’m not seeing anything in either the border router log or matter log. Any suggestions on troubleshooting this?

Additional info:

  • System: Home Assistant yellow (OS 15.2 (aarch64 / yellow) (using the built in radio for Matter/Thread, a separate dongle for Zigbee)
  • OpenThread Border Router Version: 2.13.0
  • Home Assistant Core: 2025.6.0
  • Home Assistant Supervisor: 2025.06.02

Steps to add device:

  1. HA companion app on iOS (v 18.5)
  2. Settings > Devices & services > Add Integration > Add Matter device
  3. Make sure device is in pairing mode
  4. Scan the QR code > click Add to “Home Assistant”
  5. Sits on “Setting Up…” for 30ish seconds and then fails

Error message screenshot:

IMG_2527
IMG_25271179×2556 103 KB

2

Just adding… I recently tried to add a couple of Aqara Motion Sensors, and ran into the same problem using iOS HA Companion App. I know Bluetooth was working because the Sensor’s Blue LED starting flashing at the same time the attempt to add it started.

I ended up using the Matter Server w. Bluetooth to do the commissioning.