Arduino ide linux permission denied

Error opening serial port (Linux)

Overview

When uploading a sketch you may get the following error

or, when opening the serial Monitor

Note: The number in ttyACM* may be different.

If this happens, start by ensuring that you are using the correct port:

• Arduino IDE:Tools > Port > [select port]
• Web Editor: Select port using the dropdown.

If the problem persists there may be an issue with permissions for the serial port. See below for step-by-step instructions on how to set the correct permissions.

How to set serial port permissions

Open Terminal and type

Press enter. Terminal will return something like

What we are interested in is the group name, which is probably called dialout .

Note: The number at the end of ttyACM may be different, or multiple entries might be returned.

Now we want to add your user to that group. Input the following command in the terminal, replacing with the group name from above, and with your username, both without brackets.

Press enter. Input password if prompted.

Lastly, for the new permissions to take effect, you need to log out and in to your user account.

You can verify the changes by typing

into the Terminal and pressing Enter. The group you added should appear in the list.

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Thread: Arduino USB Permission Denied error

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Arduino USB Permission Denied error

I have installed Arduino IDE 1.8.5 on Ubuntu 18.04.1 LTS.

Every time I try to upload an Arduino sketch I get the error: avrdude: ser_open(): can’t open device «/dev/ttyUSB0»: Permission denied

sudo usermod -a -G dialout seems to work OK in the terminal, the command runs, and asks for my PW, but it does not provide USB access?
Even after I log out and back in again I still do not have USB access?

I am VERY, VERY new to Linux, ZERO experience.

Re: Arduino USB Permission Denied error

which username did you use?
I don’t have that group in my list.
The permissions on my USB-to-Serial connection is this:

so adding my userid to the dialout group, would let me read and write using the ttyUSB0 device. Basic Unix permissions.

So I’m in the group. newgrp forces that shell to re-read the group membership, but doesn’t impact any other shells. I haven’t logged out and back in. It isn’t a convenient time. Will later today. Actually, Sunday is when I reboot, though logout/login should definitely be sufficient.

In the meantime, you should verify that your userid was appended to the /etc/group file like mine.

You can use sudo carefully (never with any GUI. ) to write to the device. If doing that requires using a GUI, don’t.

Last edited by TheFu; October 14th, 2018 at 01:35 PM .

Re: Arduino USB Permission Denied error

Hi, thnx for the info. I have confirmed that I am part of the root and dialout groups (using the users and groups utility).
Plus I can successfully rw files on the same USB port to a standard USB stick.

It seems to be a permissions issue for the Arduino IDE app. Do I need to grant access to the app?

Re: Arduino USB Permission Denied error

A regular userid shouldn’t be a member of any root group. That is a huge security fail.
BTW, I did reboot and my userid is a member of ,20(dialout) now. Odd.

I know nothing about writing to arduinos. Is there some physical switch that needs to be set to allow external writes to it? It isn’t a permissions issue on the Linux side.

Re: Arduino USB Permission Denied error

Hi, I started from scratch, removed and re-installed the Arduino IDE app (again, had already done it twice . . .), this fixed it.

I removed my self from root group (thnx for the advice), rebooted and confirmed Arduino IDE still has access to USB0.

Looks like I just had a failed initial installation for some reason.

Thnx for your help, I’m new to Linux and have learnt a lot in the last day.

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Uploading/Arduino gets an error : permission denied on Ubuntu 16.04

I have faced this problem for few years ago and I solved it on Ubuntu 14.04 but I don’t know why my solution doesn’t work right now on Ubuntu 16.04

I’m using the same solution from The guide , by searching for solution on Stack sites and more .

Here what I’ve done :

from the result : The owner is root and the group with access is dialout

Finally logged out and logged in.

Sompe people said they’ve solved it by removing modemmanager so I have tried that as well :

But after all , the problem hasn’t solved yet

Note: Arduino Uno with Ubuntu 16.04

Edited: After apply :

1 Answer 1

The problem is (as you already figured out), that your user is not allowed to access the /dev/ttyACM0 device. You have several possibilities:

temporarily fix the issue for your current session

This changes the ownership of the file to user and the group to group (note: you will have to do this again, as soon as you replug your arduino)

permanently fix the issue for each session

you create a udev-rule for your arduino and put it into /etc/udev/rules.d (you should be able to find a correct udev-rule for your arduino when googling for it).

The trivial approach would be the following udev-rule:

99-arduino.rules

please be aware that now every /dev/ttyACM0 device will be owned by the group «plugdev» (or whatever group you specify). This might not be, what you really want. So please read into udev-rules how to specify your arduino-device exclusively (hint: vendorID and productID)

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Arduino IDE Permision Denied For Upload, Ubuntu

I am having issues uploading to my Arduino from the IDE on Ubuntu 18.04. The error message I have received is:

Arduino: 1.6.10 (Linux), Board: «Arduino/Genuino Uno» avrdude: ser_open(): can’t open device «/dev/ttyUSB0»: Permission denied

I have checked other questions similiar to this one and have tried adding myself to the dialout group running:

and added permission to write:

After, when I run:

However,I still get the same error message from the IDE.

Any help would be greatly appreciated!

6 Answers 6

As mentioned on the official guide for Linux, you need to run

sudo usermod -a -G dialout

with the replaced with the username of your system. After running this, log out and log in and you should be good to go.

Arduino has added a script to the install to fix this problem. I found it after much annoyance trying to get it to work with all these suggestions.

In the arduino-1.8.8-linuxarm.tar.xz file that you download is a script called arduino-linux-setup.sh

run that from commandline with your user name ./arduino-linux-setup.sh

It’ll ask for the root password, and then ask you to reboot. After that you won’t have any more port trouble.

The Problem is you have the dev as , try to change to as root

Note:

One thing after your plug your USB, check your port with follow

if you can see my port as ttyUSB0 or with difference name (i.g ttyUSBx / ttyACMx ).
and then try to compile your sketch with following,

Hope this helps.

«Please Read. It might happen that when you upload a sketch — after you have selected your board and the serial port -, you get an error Error opening serial port . If you get this error, you need to set serial port permission. Open Terminal and type:

you will emphasized textget something like:

The «0» at the end of ACM might be a different number, or multiple entries might be returned. The data we need is «dialout» (is the group owner of the file). Now we just need to add our user to the group:

where is your Linux user name. You will need to log out and log in again for this change to take effect.»*

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Arduino-er

Arduino development: from beginner to beginner

Tuesday, August 26, 2014

Arduino IDE error — avrdude: ser_open(): can’t open device «/dev/ttyACM0»: Permission denied

If you run Arduino IDE on Ubuntu (Arduino 1.5.7 and Ubuntu 14.04 in my case), most possibly you cannot upload to Arduino board, caused by the error of:

avrdude: ser_open(): can’t open device «/dev/ttyACM0»: Permission denied
ioctl(«TIOCMGET»): Inappropriate ioctl for device

To fix it, enter the command:
$ sudo usermod -a -G dialout
$ sudo chmod a+rw /dev/ttyACM0

Where is your user name in Ubuntu, /dev/ttyACM0 is the detected device of your Arduino board.

Check the video:

71 comments:

Thanks! It works for me, on Ubuntu 14.04.1 and Arduino Uno clone.

Thanks a ton man. Worked perfectly!

Arduino: 1.6.4 (Windows 8.1), Board: «Arduino Uno»

Sketch uses 5,444 bytes (16%) of program storage space. Maximum is 32,256 bytes.

Global variables use 407 bytes (19%) of dynamic memory, leaving 1,641 bytes for local variables. Maximum is 2,048 bytes.

avrdude: ser_open(): can’t open device «\\.\COM1»: The system cannot find the file specified.

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

This report would have more information with
«Show verbose output during compilation»
enabled in File > Preferences.
help

Thanks. Worked like a charm 😀

thanks, just works !

Didn’t work for me. no /dev/ttyACM0. On my Ubuntu 14xx found out that all I needed to do was to set Tools|Port in the IDE to /dev/ttyUSB0

Thanks a lot. Fixed the issue for me on Xubuntu 15.10 64bit, with Arduino IDE 1.6.5

Thanks a lot!It works!

Thank you ! works well in MINT !

Thanks a lot. Fixed the issue for me on Ubuntu 15.04 64bit, with Arduino IDE 1.6.7

Thanks! It worked for me in Mint 😉

thank you but do you know how to get this persistent? After every USB Disconnect it seems to loose the required rights on the device.

Thanks!
It’s work for me in Debian Jessie x64

Thanks a lot. It worked for me in Ubuntu 14.04.3 and Arduino UNO clone.

Worked for me, thnks

Thanks! It worked for me.

This worked on /dev/TTYUSB0 in Ubuntu Linux Desktop 64-Bit v15.10 when I was trying to access the FTDI USB-to-Serial adapter via the Arduino IDE. Thanks for enlightening us!

Gracias, funcionó muy bien en Ubuntu 14.04.4 64 bit con Arduino 1.6.8

Thanks! It worked for me, on Linux Mint 17.3 64-bit and Arduino 1.6.9

Thank you! It worked for me.

Thanxxxxx worked for me too, so I have created a executable bash script its a solution for them dont want execute this lines every time

thanks a lot,
It works for me with Mint on:
CPU

Dual core AMD A4-4000 APU with Radeon HD Graphics (-MCP-) clocked at 1400.000 Mhz Kernel

3.16.0-38-generic x86_64 , USB0, arduino software 1.6.9.

whenever i upload code to my arduino uno board this error will occur
avrdude: ser_open(): can’t open device «\\.\COM20»: The requested resource is in use
please anyone help me
(OS — windows 8.1)

hello sir this is jyothirmai from klu
did u got the answer for our question plzz share it to me it will be helpful to my project

Works fine 🙂 but commands need to be rewrited after disconnecting arduino board. Any solution?

Thanks ! work for me in Ubuntu 16.04 LTS

Thank you so much. It works very well. Problem solved thanks to you. Regards from france. Chris

Thx. works in Ubuntu 10.04 LTS and Arduino IDE 1.6.9

Thanks, it works too with Linux Mint and Arduino Yun. (on IDE 1.6.10)

Thanks! It worked for me.

Hi i did this but now i got an other error: Im on linux 14.04

Le croquis utilise 928 octets (2%) de l’espace de stockage de programmes. Le maximum est de 32 256 octets.
Les variables globales utilisent 9 octets (0%) de mémoire dynamique, ce qui laisse 2 039 octets pour les variables locales. Le maximum est de 2 048 octets.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00
Problème de téléversement vers la carte. Voir http://www.arduino.cc/en/Guide/Troubleshooting#upload pour suggestions.

Muito bom!! Obrigado!!

Thank you so much!

thak yo soooooo much

thank you ! it’s work !

thank you, works for me on arduino mega — kubuntu 16.04.

it worked nicely man thanks a ton. But the problem is that I have to run these commands every time I plug in my arduino. It works only for the time the board is plugged in. Is there any permanent solution.

Thanks worked in Linux Mint, but i used .
$ sudo usermod -a -G dialout
$ sudo chmod a+rw /dev/ttyUSB0

As it was detecting the Arduino as ttyUSB0

Worked,thanks! but really need permanent solution!

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