Using adb with multiple devices with the same serial number [duplicate]

Answer 1

Maybe I can help you, I was able to solve this issue by changing the device ID/Serial:

1. adb shell
2. cd /sys/class/android_usb/android0/
3. echo -n xxx > iSerial (the xxx is the device id you want)
4. cat iSerial (check the new device id)
5. Unplug usb cable and plug again, then the change worked.

To change each id, your PC should only be connected to one device via usb.