The controller is not connecting to the cloud service.

No physical connection:

1. Verify that the Ethernet cable is connected to the controller.
   
2. Check for network port indication.
   
3. Check if the cable is disconnected or damaged.
   
4. If using Wi-Fi connection, ensure that the connection is established to an active router.
   

No Internet connection:

1. The Internet access service may have been suspended or there may be a connection problem on the ISP side.
   
2. Contact your ISP for assistance and diagnosis of the problem.
   

Incorrect network connection settings (Ethernet/Wi-Fi):

1. Make sure the controller is configured according to the network connection requirements.
   

Incorrect Account ID:

1. Verify that the correct ID is specified and the selected cloud service is available for connection.
   

Closed Network Ports:

1. Check to see if your router or other security tools are blocking network ports that allow access to the cloud service.
   

Note: Some ISPs may deny access to certain ports on the network, which may prevent your device from connecting. Check that the following ports are available for external connection: 80, 443, 18883, 1883, 123, 2390.

Incorrect DNS:

1. Make sure your device has the correct DNS configuration for cloud service name resolution.
   

Additional recommendations:

1. Reboot the device and retry connecting to the cloud.
2. Check for firmware updates to the device that may correct issues connecting to the cloud service.
3. If necessary, contact technical support for further diagnostics and problem resolution.
   

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