Today in the post I received a little Jewei USB tester from Banggood – to give it the full title - JUWEI Multifunctional Color TFT USB Tester Bluetooth Type-C PD Digital Voltmeter, Current Meter, Ammeter, Power Bank Charger Indicator.
Banggood asked me to include this link: JUWEI Multifunctional Color TFT USB Tester Bluetooth Type-C PD Digital Voltmeter -- https://goo.gl/mTWsrB
And here it is, I went off to their web ad in search of software and docs, sure enough all in one place from that link above.
Here’s the PC software (I also have Android software) and the unit itself which has a Bluetooth adaptor and both USB I/O and USB C I/O connectors. Smashing little device which test various charging protocols including QuickCharge 3. If you want more, follow the link higher up. Ignore warnings about the site not being secure.