Aqara P2 not connecting

[JohnD]

@paulcunliffe1979

However I noticed that the sensor had dropped out of HA, but then aqara app.

This may be because you are using the ipv6 prefix from your provider. Change your internet router settings so that Unique Local Addresses (ULA) are used instead of Global Unicast Addresses (GUA).

@paulcunliffe1979

My home network was merged between 2.4ghz and 5ghz, these are now split.

Temporarily disable the 5 GHz network to ensure that all devices are using the 2.4 GHz network. It is crucial that all devices (smartphones, hubs, border routers) are on the same network.

@paulcunliffe1979

I have looked and confirmed that IPV6 is working on the mobile device but again nothing.

Does your device get an IPv6 address when it is connected to Wi-Fi and Bluetooth is enabled? Are you using the same smartphone and user account that you used to create the Thread network?

@paulcunliffe1979

Update: I have tried adding it to a 4th Gen Echo, it added OK, shows in the APP but wont pull data through

Can you connect the P2 in HA and Aqara with the Matter code via Multi-Admin?

@JohnD

Connecting to Additional Systems (Multi-Admin)

1. Generate Code: Go to the app with which you connected the device first (e.g., Aqara Home). Important: Do not use the sticker on the device for this second step.
2. Activate Mode: Look in the device settings for an option like “Matter Pairing Code” (Aqara) or “Turn On Pairing Mode” (Apple).
3. Copy Code: The app will now generate a new, digital QR code (or a numeric code). The code is usually in the format 0000-000-0000. When copying, ensure the format is correct (some apps require the hyphens, some do not).
4. Second Pairing: Now open the second app (e.g., Alexa or Home Assistant) and scan this QR code (or paste the numeric code). Important: Pairing should be done immediately, as the generated code is time-limited (usually 15 minutes).