How to check that the communication distance between the subdevice and the hub is within the normal range?
For details, refer to "Checking the effective distance" in the manual of the sub-device. The sub-device indicator light will flash and the hub will play a voice prompt “Connection is normal”, indicating that the device and the hub can communicate effectively. If the communication is not normal, try moving the sub-device closer to the hub or move the hub closer to the sub-device and try again.
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