If you failed to set up the HomeKit, please try the following troubleshooting. 1. Error Code "Accessory Not Found." If you get this error message, please try the following: Restart your iPhone/iPad to clear the cache of the Home app. Follow the user manual to reset your smart device. Restart your smart device and try again. 2. Error Code "Unable to Add Accessory" 2.1 Connect to a 2.4GHz WLAN network and try again. If you get this error message, please try the following: Connect your iPhone/iPad to 2.4 GHz Wi-Fi network to add your smart device. If the problem persists, please temporarily turn off the router's 5 GHz Wi-Fi until your smart device is successfully added. Make sure VPN/DSN services are disabled on your iPhone/iPad. 2.2 Security check failed... / To add this acccessory to your home... If you get such error messages, please try the following: Log in to your router's interface to check the Wireless Security. If WPA3-ONLY is applied, please set the encryption method to Auto or WPA2/WPA3. Follow the user manual to reset your smart device. Restart your smart device and try again. 2.3 The setup code is incorrect. If you get this error message, please try the following: Make sure you have entered the correct 8-digit code printed on your smart device. Follow the user manual to reset your smart device. Restart your smart device and try again. 2.4 Operation timed out. If you get this error message, please try the following: Make sure your smart device is powered on. Restart your iPhone/iPad to clear the cache of the Home app. Restart your smart device and try again. Log in to your router's interface to check the Wireless Security. If WPA3-ONLY is selected, please set the encryption method to Auto or WPA2/WPA3. Log in to your router's interface to check if you had configured Blacklist or Firewall settings on your router, which might block your smart device. Log in to your router's interface to check if you had configured MAC Filtering or Access Control functions on your router, which might block your smart device.