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I just bought an ARDUINO MICRO and it looks it is recognized by the system since it shows on /dev/ttyS0. The sketch I wrote compiles without error, but when I try to upload I get: enter image description here If I press the reset button, as suggested, after starting the loading process, I get

Arduino: 1.8.13 (Linux), Board: "Arduino Micro"

Sketch uses 4026 bytes (14%) of program storage space. Maximum is 28672 bytes.
Global variables use 149 bytes (5%) of dynamic memory, leaving 2411 bytes for local variables. Maximum is 2560 bytes.
An error occurred while uploading the sketch
avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

Using the verbose output, I get:

Arduino: 1.8.13 (Linux), Board: "Arduino Micro"

Sketch uses 4026 bytes (14%) of program storage space. Maximum is 28672 bytes.
Global variables use 149 bytes (5%) of dynamic memory, leaving 2411 bytes for local variables. Maximum is 2560 bytes.
PORTS {/dev/ttyACM0, } / {/dev/ttyACM0, } => {}
...
PORTS {/dev/ttyACM0, } / {} => {}
PORTS {} / {} => {}
...
PORTS {} / {} => {}
PORTS {} / {/dev/ttyACM0, } => {/dev/ttyACM0, }
Found upload port: /dev/ttyACM0
/home/gigiux/src/arduino/hardware/tools/avr/bin/avrdude -C/home/gigiux/src/arduino/hardware/tools/avr/etc/avrdude.conf -v -patmega32u4 -cavr109 -P/dev/ttyACM0 -b57600 -D -Uflash:w:/tmp/arduino_build_442878/pushLED.ino.ino.hex:i


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 "/home/gigiux/src/arduino/hardware/tools/avr/etc/avrdude.conf"
     User configuration file is "/home/gigiux/.avrduderc"
     User configuration file does not exist or is not a regular file, skipping

     Using Port                    : /dev/ttyACM0
     Using Programmer              : avr109
     Overriding Baud Rate          : 57600



avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied


avrdude done.  Thank you.


Problem uploading to board.  See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

It looks like a system error more than a board's issue. What would be the problem? The troubleshooting list does not give a proper solution for this issue since it does not mention access denied to port...

Thank you

Tsundoku
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Gigiux
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1 Answers1

4

This happens because your user account does not have permission to access the USB Serial port.

You can fix this by running sudo usermod -a -G dialout $USER and rebooting your computer. After this, start Arduino IDE again, choose the port again and upload the firmware again.

Note: In general, I recommend installing the "Arduino IDE" Snap from Ubuntu Software instead of installing Arduino IDE manually from the Arduino website. The snap should check if you have the right permissions and explains how to fix the issue.

Merlijn Sebrechts
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