USB Keyboard - slow response/dropped keypresses


Author Message
Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 746
Posted: 08:40pm 04 Jul 2025      

Flashed again with new firmware you provided:

Problem persists.

To understand you correctly what do you mean with:

  Quote   run your finger across the groups of 4 keys


Do you mean what happens if I slowly "slide" over the keys? Probably to make sure that only one key at a time is pressed? This works only on one keyboard (nr. 1 in the file) without a fault. The other one gives missing keys.

I reorganized the file and added numbers too, it is really strange but definitly some kind of pattern. All keyboards have different problem spots. See for yourself, I've attached the file:


keybordTest.zip

What I find so interesting is, that all keyboards have the EXACT same error pattern which is perfectly reproducible, but every keyboard has a different problem area... So somehow you are right, at least the keyboard is part of it. But not the only factor.
With the converter firmware I have an error-rate of zero on all keyboards, I also flashed it on the very same Pico I created the file...

But what I don't understand is, that it seems that you can not re-create this problem... I am sure you have different keyboards. Sadly I haven't a US-keyboard, but at least we know of now (two?) persons who use a US-keyboard with this problem. So it isn't a language thing.

(I have only two keyboards in the file, if you want I add even more)
Edited 2025-07-05 07:11 by Amnesie