Two Important Tips:

1. Creating a new home in the Home app can greatly help set up the HomeKit accessory, click here for more instructions.

2. A workaround can greatly help set up the HomeKit accessory, click here for more instructions. 

If you don't use the Home app, please click here for instructions to add the device to the Meross app.

General troubleshooting(Can solve 95% pair failure cases):

a. Reboot your iPhone/iPad to clear the Apple Home app’s cache.

b. Follow the user manual to reset the accessory.

c. Power cycle the accessory. For the light switch, please reboot it at the circuit breaker.

d. Ensure that you have a dedicated 2.4GHz Wi-Fi network, or do not use the same Wi-Fi name for your 2.4GHz and 5GHz networks until the setup is successful.

e. Configure the accessory again.

If you still have issue, please find the Error Code and corresponding instructions below:

1. Error Code: "Accessory Not Found. Make sure your accessory is powered on and...", "Unknown Error", or "Accessory is not reachable"

   Please click here for instructions.

2. Error Code: "Unable to Add Accessory. Connect to a 2.4GHz WLAN network and try again"

   Please click here for instructions.

3. Error Code: "Security check failed..." or "To add this accessory to your home, connect your iPhone to your HomeKit enabled router..."

   Please click here for instructions.

4. Error Code: "Setup code is incorrect"

   Please click here for instructions.

5. Error Code: "Operation timed out"

   Please click here for instructions.

6. Error Code: "Uncertified Accessory" or "Cannot be used with HomeKit" 

This could be a glitch from cloud server of Apple. Please wait for 1~2 hours and retry again.

Our customers have pointed this issue out and solved it here.

7. If your router is Eero brand, please find solution here.

8. If you lost the QR code or 8-digit setup code, please click here.

These solutions should help you address the failure. If not, please contact Meross Support for assistance.

For more information on how to use HomeKit, please click these links to learn more.

Siri Control: 
https://support.apple.com/en-us/HT208280

Share device with family member: 
https://support.apple.com/en-us/HT208709

Homkit Hub:
https://support.apple.com/en-us/HT207057