appium--connect to the real machine, ADB devices get no device number

After connecting to the real machine, you cannot get the device number using ADB devices.

1, check the USB interface is normal, whether the normal link to the computer

2, mobile phone developer mode is turned on, USB debugging is turned on

3, check whether the driver is normal

4, if the driver display Huang number, or ADB devices no device number, use the Driver Wizard to check the driver, update the drive

Check again, normal

appium--connect to the real machine, ADB devices get no device number