Based on user feedback and our verification, some HomeKit pairing failures may be related to the Home app or iCloud data. To resolve this, follow the steps below:

1. Reset the device according to the user manual.
2. Create a new Home in the Home app, for example, "My Home Test".
3. Switch your Home to "My Home Test" and try to add the device.
4. If the device is successfully added, delete the "My Home Test".
5. Do not reset the device, and try to add the device again by scanning or manually inputting the code in your Primary Home. The chances of adding the device will be relatively high.

Additionally, the Apple team has announced a system update to optimize this issue in the near future.

If you are still unable to add the device successfully in step 4, please click here or contact Meross Support.