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alvarop / usb_c_cable_tester

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Interpreting the results? #13

Open grymoire opened 1 year ago

grymoire commented 1 year ago

If a signal is missing, I'm not sure I can tell that there is a problem. It would be nice to have a chart that shows/lists the LED's that are suppose to be on for certain cable types.

grymoire commented 1 year ago

A similar product has a manual, and includes a helpful guide. C2C-caberQU PDF

Here's what page 7 shows

USB Power Delivery

USB 2.0/1.1

USB 3.0/3.1/3.2/4

Debug Accessory Mode

Alternate Mode

Audio Adapter Accessory Mode

NSExceptional commented 10 months ago

It's a shame the author hasn't responded. Is that chart enough for a lowly coder to use to organize his USB cables in your opinion, @grymoire?

ejl371 commented 9 months ago

Wikipedia tells you what pair does and what modes it is used in. https://en.wikipedia.org/wiki/USB-C. The author is amazingly responsive when I reached out to ask about another issue. Which coincidentally someone else opened the same day (issue 18).

anyconhhv commented 9 months ago

I gathered all of my cables and tested them. I then attached a label to each with the type of USB. And then if a cable doesn't work, I try a cable with more connections. There is an amazing number of variations in type and price, especially in USB-C cables. I have photos of a couble that might help.

This first one was an expensive cable - All lines are on exzcept for D+/D- on one side, but if you flip the USB3 cable over, the D+/D- on the other side lights up. Full-a

Now here's cable #2. I am not sure how this cable was classified. Note that how I plug it in, there are three different combination of light patterns. Semi1-a

Now flipping over the USB-C, note how TX2/RX2 become TX1/RX1 Semi2-a

And now plugging into the green USB2 port instead of the blue USB3 port, we just get VBus/Gnd and D+/D-. Note we have 2 sets of Gnd/VBUS/ Semi3-a

Here's a USB-C to USB-C cable I use for fast charging. Note it has two sets of VBus/Gnd and D+/D-, but there is also a CC2 light. If I flip the cable over, CC2 on the left changes to CC1 on the right.

usbc

And finally - a plain, ordinary USB2 data cables - with one set of VBus, ground and D+/D-. usb2-a

grymoire commented 9 months ago

Oops. I submitted the above info on my other account. I'm also anyconhhv