Erease code from Arduino

[pepitogrillo7281]

I'm currently using an Arduino Pro Micro. I uploaded a code using the Keyboard library, that wrote a 'Q' in an infinite loop. The next time I tried to upload something, i got the following error:

Global variables use 149 bytes (5%) of...
Error occurred while uploading the sketch

I guess the programming port is full of 'Q's, and there is no space left for me to upload the program.

Is there any way to completely erease an uploaded skethc? The only solutions I got are to upload an empty sketch, but as you may supose, I can't.

Hope you can help. Thanks!!

[groundFungus]

@pepitogrillo7281

I guess the programming port is full of 'Q's, and there is no space left for me to upload the program.

I doubt that that is the case. It is not how programming works. It is more likely that you have a communication problem.

Please include the entire error message. It is easy to do. There is a button (lower right of the IDE window) called "copy error message". Copy the error and paste into a post in code tags. Paraphrasing the error message leaves out important information.

[pepitogrillo7281]

Hi! Thanks for your answer.

avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "D:\Arxius de Programa DISC D\Arduino\hardware\tools\avr/etc/avrdude.conf"
Using Port : usb
Using Programmer : stk500v2
An error occurred while uploading the sketch
avrdude: usbdev_open(): did not find any USB device "usb" (0x03eb:0x2104)
avrdude done. Thank you.

I've got the verbosity option always activated, hope it helps.
Thank you!

[alto777]

If you've made it into a USB device, you may have to go a bit out of your way to reprogram it.

I googled

 can't reprogram usb pro micro

and found

SOLVED: Completely resetting Arduino Pro Micro

First post here, I have a SparkFun Arduino Pro Micro soldered to a 4x4 macropad. I previously flashed the Arduino with a .hex file (compiled through QMK) for the macropad, and it works great. The only problem is that I have connected other SparkFun devices to the Arduino now, and I want to reprogram it to handle more than just keypresses. I've tried pretty much everything to reset the board (uninstalling drivers, "double" resetting, etc.), yet everytime I plug it into my PC, my PC immediately …

which may be your issue.

If it's not a help, google along the same lines, I just post the first one that looked plausible.

a7

[weshowe]

One easy thing that also MAY work is merely closing the serial monitor window before trying the upload. At least here, when I have a program that is actively sending data out, and the serial monitor window is listening, the programmer seems to not always be able to get ahold of the port, since it is in use by the serial monitor.

[pepitogrillo7281]

That really worked! Thank you so much for your time