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SCREEN BLACK AFTER UPLOAD GIF #70
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Same thing happened with me with 2 separate Knomi v2 boards Attempting to use Flash Download Tool as discussed in the documentation for updating the firmware (even when trying to use the stock firmware from the documentation) simply results in "2-sync fail" I have confirmed that the baud rate is identical in the Windows COM settings and the upload settings of the tool as well |
Edit: Please see my newer comment below for a fix to flash the stock firmware. This also happened to my Knomi v2 yesterday. I originally used the web UI at Output snippet:
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I was originally just very happy to have my Knomi working again, but I also couldn't get it to run the firmware I compiled. I'm now leaning towards the conclusion that my board, or perhaps this newer batch of boards that we have, are faulty. The box mine arrived in says "D/C: 2024.2.24" on. Once mine worked from my comment above, I tried the web UI updater using the same firmware.bin I'd used with the USB flashing tool -- it didn't crash or brick at the time. but when I turned my printer off and on, the toolhead (SB2209 RP2040) wouldn't start & everything smelled like solder. My Knomi no longer runs, not even in DFU mode, nor has a red light over USB, but does get extremely hot when plugged in. |
Still can't get something other than black screen with compiled firmware, even stock option (same commit as precompiled one). Any suggestions/solutions? |
Answer which worked for me #51 (comment) |
Did anyone ever figure a way around this. I have the same issue. Pre compiled firmware works fine (even other people's custom pre compiled firmware worked!) But when I flash anything I compiled/built, I just get the black screen. Tried everything I can find through the issues and im no stranger to vscode/platform io. I assume it must be a version or something thats out of sync as firmware that others have compiled works on my screen. It's very frustrating and I can see others are having the same issue (which kinda makes me feel a little better about the situation haha) |
@spigrex look my latest comment
TL;DR: use 6.4.0 framework
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What does this do sorry? Like how do I run this in a terminal? This seems like it fixes an issue with compiling/building errors and has nothing to do with the knomi resulting in a black screen after flashing (sorry if I'm being stupid here!) |
Ah you star! This totally solved my issue ...can stop pulling my hair out over this now! ...just changed the env:knomiv2 in platformio.ini and it flashed fine Thanks ...feel so silly that it was this simple. |
My KNOMI V2 had a black screen after uploading a new GIF, I can't do anything else, not even access the webpage to connect, It also no longer appears as an option on the wifi, nothing happens, I remove the USB and insert it, and only the red light appears in board, not even the Hello message. I can only upload it through VSCODE, but it doesn't seem to have any effect, it completes the process with the SUCCESS message, but the screen remains black.
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