this post was submitted on 27 Oct 2023
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ErgoMechKeyboards

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Ergonomic, split and other weird keyboards

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Posts must be of/about keyboards that have a clear delineation between the left and right halves of the keyboard, column stagger, or both. This includes one-handed (one half doesn't exist, what clearer delineation is that!?)

i.e. no regular non-split¹ row-stagger and no non-split¹ ortholinear²

¹ split meaning a separation of the halves, whether fixed in place or entirely separate, both are fine.
² ortholinear meaning keys layed out in a grid

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I am not sure where to ask this, so here it goes:

I was soldering my new Cantor split keyboard, which is using two STM32F401 Blackpill microcontrollers. I had to resolder some parts on the left side, so the soldering there is sloppy. Now when I plug in this side, the board seems to be in flashing/Boodloader-mode instantly without me having to press the BOOT0+NRST botton combo. This causes the left side being unable to "type" because it's expecting software.

What pins (or switches?) should I take a look at? What could cause the Blackpill to be in Bootloader mode all the time? I tried to read the Documentation of the board, but I'm afraid all of it went right over my head...

Thanks in advance!

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