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Check whether the device supports HUAWEI HiLink. Only smart home devices that support the HUAWEI HiLink protocol (marked with \"Support HUAWEI HiLink\" on the packaging, manual, or shopping mall purchase page) can be scanned by the App and added control. Make sure that the distance between the mobile phone\/tablet and the device is close enough (less than 1 meter is recommended), and the wireless network signal is good at the location of the device