ZHA协议有对通道的规定，会切换到其他通道继续扫描。如下是规范对通道的描述。
Channel Mask
All channels in frequency band. If needed, the power transmitted by the device on channel 26 can be lowered to comply with FCC regulations.
Preferred Channels (11, 14, 15, 19, 20, 24, 25)
When forming a new network, or scanning to join a network, HA devices should do channel scans using the above channel mask before scanning the rest of the
channels in order to avoid the most commonly used WiFi channels. This is to improve the user experience during installation (quicker joining) and possibly improve bandwidth (on average).