Keyboard Builders' Digest / Tips & Tricks
USB-C Pro Micro issues
Difference in routing of some USB-C Pro Micro clones reported by hellmoneywarriors.
Published October 31, 2021
An entire batch of USB-C Pro Micro clones I just received from the vendor TZT on AliExpress (and I imagine other vendors are selling the same one) have a PCB layout problem where the physical footprint of the board matches a regular Pro Micro, but at least two of the pins are routed incorrectly – hellmoneywarriors.
The Arduino pin numbers on the silk screen are listed in the correct order, but in reality pin 14 and 15 are reversed. In QMK code, the pin numbers are the direct pin numbers of the Atmega32U4 chip, B1 and B3.
If you are trying to flash a QMK firmware to one of these controllers and have issues with incorrect columns and rows, try going into the config.h file and swapping the two pins. If the original code shows B1 and B3 in the list of row or column pins it's using, try swapping the two and recompile your firmware.
Reports of successful tests suggest that only some of the batches are screwed up, and others may be totally fine.
Published on Sun 31st Oct 2021. Featured in KBD #50 (source).
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