ahh, one of those famous three-wire USB cables.
GND, VBUS, and D+ are connected, D- isn't. I'm sure that'll work fine
also this tester can tell if a USB-C cable is inserted upside down or not.
I kinda hate having this ability
also I'm using this device in the CR2032-powered 3v configuration, right?
I own at least one cable that works at 5v but doesn't at 3.3v... because it has some smarts in it, and they don't run at 3.3v
@foone nice, the old fire wire. Somewhere someone's found an old camcorder that needs that cable.