Datasheet

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I'm trying to upload to my 32u4, getting "avrdude: butterfly_recv(): programmer is not responding"

errors

This is likely because the bootloader is not kicking in and you are accidentally trying to upload to the wrong COM

port

The best solution is what is detailed above: manually upload Blink or a similar working sketch by hand by manually

launching the bootloader

https://learn.adafruit.com/adafruit-feather-32u4-radio-with-rfm69hcw-

module

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