We have an white label manufactured Android tablet that snaps into a dock made by the same vendor. A USB port on the tablet is replicated to the dock, which has a Type A port that we plug an RFID reader into. The USB port on the dock is powered by the dock, not the tablet.
We are seeing conditions where the tablet is removed and replaced on the dock and the data connection to the dock’s port is not resumed. If we plug the reader back in, it usually reconnects.
Is there a way where I can plug some board or device (something like this VBus breakout board?) between the dock and the reader and check the lines with a voltmeter?