Re:Why some USB C cables work, or not, J-Link
by shadowpho on Sunday September 28, 2025 @05:10PM
(#45408046)
https://a.co/d/2OMfGrg
Here you go, I got this guy and it’s fantastic.
Tells me pd capabilities, voltage/current and resistance.
Re:Why some USB C cables work, or not, J-Link
by simjnd on Sunday September 28, 2025 @05:06PM
(#45408004)
Could this be done in software? I'm very uneducated on the topic but doesn't your computer need to know the capabilities of a cable when it's plugged in? (USB speed, PD support, etc.)
Re:Why some USB C cables work, or not, J-Link
by lxgr on Sunday September 28, 2025 @05:48PM
(#45408395)
At least for e-marked cables, this seems possible, and once the other side is plugged in at well, it should be clear to the controller what it is and what type of cable connects the two devices (only 2.0 cables supporting at least 3A/20V are allowed to not have a marker per the spec).
No idea why this is not a thing on most devices.
Re:Why some USB C cables work, or not, J-Link
by StrangeDoctor on Sunday September 28, 2025 @04:39PM
(#45407776)
https://hackaday.com/2023/08/11/usb-c-cable-tester-is-compac...
These sorts of devices can tell you how a cable is wired up, which is great for a a first pass or spot checking.
Re:Why some USB C cables work, or not, J-Link
by Aaargh20318 on Sunday September 28, 2025 @05:10PM
(#45408044)
FNIRSI FNB58 might do what you want.
I have a giant stack of cables and it would be nice to know what they can do.