Problem uploading to ADAFRUIT Feather 32u4 using Arduino 2.1

Hi all,

Long time fan of the technology, first time user of the forum.

Currently using a Windows 10 box, with Arduino 2.1 and the following board, from RS Components:

ADAFRUIT Feather 32u4 Development Board 2829

Long story short, I used to be able to upload to the board, and now it just hangs at the upload screen, then after 4-5 mins, gives me the below error.

I have used different USB Cables, USB ports and even computers, same issue. I am wondering if i am doing something silly...

This is what i am getting:

"Sketch uses 10934 bytes (38%) of program storage space. Maximum is 28672 bytes.

Global variables use 885 bytes of dynamic memory.

Connecting to programmer: .avrdude: butterfly_recv(): programmer is not responding

avrdude: butterfly_recv(): programmer is not responding"

Had a read of this too:

https://stackoverflow.com/questions/49283074/arduino-leonardo-avrdude-butterfly-recv-programmer-is-not-responding

have tried the 'reset button' before programming, getting the red pulsing light indicating it is resetting, and then tried the upload, still nothing...

Anyone know where i am going wrong?

Really appreciate any help, thank you all!

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dougw over 2 years ago

Some of my 32U4 modules require the reset button to be pushed twice and the timing of the pushes needs to be right for it to work.
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Alexander28 over 2 years ago in reply to dougw

Thanks sir, can you elaborate as to how you do it?
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Alexander28 over 2 years ago in reply to dougw

Thanks sir, can you elaborate as to how you do it?
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dougw over 2 years ago in reply to Alexander28

The first reset just resets the MCU, the second reset puts the MCU into booloader mode via the USB port. It only stays in bootloader mode for a few seconds, so the double reset sequence needs to be performed just before the IDE starts looking for a target to upload to. But there must be time for the USB to be enumerated by the PC before the IDE starts its upload. So 2 reset pushes about 0.4 seconds apart, leaving just enough time for the USB to be enumerated before the IDE starts its program dump. Generally the resets need to be performed well after the compile has started. You may need to experiment to get a feel for the timing.
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Alexander28 over 2 years ago in reply to dougw

Thank you, will give it a crack later...
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Alexander28 over 2 years ago in reply to Alexander28

Yup, see final reply, worked like a charm.
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