Nothing detected

[uivmc]

I finished building cheapino v2, flashed the uf2 (the one for v2), got the LED to turn on, and detected it on vial.rock. But the matrix test gave an error and none of the keys worked.
Then I noticed I needed to solder the legs to the MCU (I used socketed MCU).
After I did that the MCU LED is off, vial.rock can not detect it anymore, and still none of the keys work.
I've reflashed the uf2 (the MCU can still show up as a USB drive. I notice this time the uf2 file disappears after I drag it on, originally it would stay there), and reset my computer. I've used a multimeter to check the legs at the top of the MCU are electrically connected to the solder at the bottom of the PCB. I've shorted two pins of a switch and still no keypress. Nothing has worked.
What should I do?

[tompi]

Hi, could you post a picture of the mcu? (maybe some solder bridges?)

If you test with mcu out of socket, does the led light up?

[uivmc]

Hi.


Even out of socket no light.

[uivmc]

I was wondering if I damaged the MCU.
But I was able to do the blinking led demo via Arduino IDE from this video
https://www.youtube.com/watch?v=eTf5z5lcWhc
so I know it is still functioning.

edit:
also I notice that when I plug in the MCU to the computer, for a brief second vial can detect the cheapino (If I manage to select it and click connect in that period then vial gets stuck displaying "Connecting to the device..."). But then it loses connection and then file explorer opens to the USB drive of the MCU.

[azzamsa]

I have a similar issue (nothing detected), and it was a wrong firmware #104. I am using v1 for v2 board.

[uivmc]

I had made sure to download v2 uf2. And my PCB says v2 so they match.
In your issue you mention a cheapino and cheapinov2 branch. But neither exist to me. I only see a master and fix/case-tolerances branch. Do you mean tags?
I tried the v1 uf2 just in case and interestingly vial can detect and connect with that. The keys give the wrong outputs though, which matches what the troubleshooting guide predicts for incorrect version.
I also noticed that the v2 uf2 file was updated 4 days ago, which is 1 day before I downloaded it...
@tompi Can you provide the old version of the v2 uf2 file? I want to check if that works.

[tompi]

Hey, you are correct, I changed the default brightness of the LED(turned it way down...), and I probably should up the release version, but until now I kind of feel like the gerber is the versioned artifact... but i will take care. and not change releases in the future.

The attached uf2 is from july, please let me know if it works!

Could you maybe try with some other usb cables?
I know there are issues with "too good" cables and the cheapino, so if you have a usb2 cable, it would be interesting to hear if that works better.

cheapino_vial.uf2.zip

[uivmc]

The old uf2 also doesn't work. No LED and no vial connection.
I had previously tried with multiple cables. Some of them didn't even show up as a drive. Others did but didn't work.
One of them is the magnetic cable from the ordering guide. The combined cable + plug option was out of stock but the individual cable and individual usb-c plug were available so I had ordered those.

[tompi]

Hey, sorry I forgot to reply to this one... Did you figure out what was wrong?

If not, is vial recognizing your out of socket rp2040 if you flash it with any of these uf2 rp2040 files? https://okin.gitlab.io/vial-qmk-firmwares/

[uivmc]

I did not figure out what was wrong.
Vial detects the out of socket (and also in socket) rp2040 when I flash asmodus_plaquead_rgb_vial.uf2 onto it.

[tompi]

Which host is Are you using? And did you try on another machine or with a docking station?

[uivmc]

I used the online vial. https://vial.rocks/
In the past I have tried: on another machine, with usb-hub, and without usb-hub