I tried on a different Windows 11 laptop and on a Windows 10 I managed to find. Fresh install of the updated FTDI driver, also of Arduino 2.3.7, same symptoms. I’m fully stumped.
A few of the solder joints look a bit iffy; can you test the for shorts/continuity between pins?
The continuity and short tests are all over the place. Some pairs even give different results depending on whether the red or black tester is used. In the same breath, both kits I soldered together give the exact same results in all of the pairs testing. It seems weird that if the variance denotes errors, that both kits error out in precisely the same ways.
Edit: in yet another puzzle, I hooked up to the current board in use on our exhibit floor, and the upload was successful. Which means all the settings are correct in Arduino, and it’s strictly the board that’s the issue somehow. I’m going to take the connector off that current board and swap it for the others that aren’t working. Maybe that’s the lynch pin.
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Regarding my breakthrough last night, I cannot determine what I did with constructing these kits that makes them inaccessible to Arduino uploads. I tried taking the pins out of the current board and putting them into one of the boards–no change, and in fact the board’s lcd screen won’t light up like it did before. The second kit’s screen lights up, but the transfer error is still the same.
I can’t think of what else it’d be at this point besides the pins that where the FTDI basic attaches.
I just have no idea.
