Error Opening Serial Port /dev/ttys0
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Cannot Open /dev/ttys0 Permission Denied
Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and developers. minicom cannot open dev tty8 permission denied Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Changing permissions on serial
Ubuntu Dialout Group
port up vote 21 down vote favorite 6 I'm using the Arduino IDE in Ubuntu, and am having issues with the serial port. It has worked in the past, but for reasons that may be unnecesary, I felt the need to change the ownership of some of the files from root ownership to my users ownership. This made the IDE work correctly, but I lost the ability to use the correct serial port. In could not open port /dev/ttyusb0: [errno 13] permission denied: '/dev/ttyusb0' the dev folder, the port I need is listed as permission 166. Someone (who is no longer in the area to help me) swapped the permissions to 666, which made it all work gloriously. However, it reverted back as soon as I restarted my computer, and if I now try to use the command: sudo chmod 666 ttyACM0 nothing happens. No error messages, but no permission change either. How can I change it, and how can I get it to change permanently. I apologize if this question is overly simplistic or unclear, I'm an ubuntu noob, and I wouldn't begrudge feedback! permissions chmod serial-port arduino share|improve this question edited Aug 22 '12 at 22:57 Doomy 2542314 asked Aug 21 '11 at 17:23 Terrik 213128 sudo chmod 666 /dev/ttyACM0 This was the only suggestion on this page that worked on my 14.04 beta2 live environment. Thanks! –user264842 Apr 3 '14 at 8:01 add a comment| 5 Answers 5 active oldest votes up vote 33 down vote accepted The issue with the permissions for /dev/ttyACM0 can be permanantly solved by adding yourself to the dialout group. You will have to logout and then log back in before the group change is recognized. You can do this with sudo usermod -a -G dialout terrik if terrik is your username.
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(read only) > Software > Troubleshooting > Error opening serial port http://forum.arduino.cc/index.php?topic=49623.0 '/dev/ttyUSBx' on Ubuntu Print Go Down Pages: [1] Topic: Error opening serial port '/dev/ttyUSBx' on Ubuntu(Read 51757 times) previous topic - next https://bugs.launchpad.net/bugs/949597 topic Helge Milde Newbie Posts: 3 Karma: 0[add] Arduino rocks Error opening serial port '/dev/ttyUSBx' on Ubuntu Dec 03, 2008, 03:42 pm Hi!I'm permission denied suddenly having problems uploading/communicating with my Arduino board via the Arduino Java IDE.. The strange thing is it happened after working for 2 days straight..I was editing a program, continously uploading and testing it, when I clicked the "Serial Monitor" button so I could debug (which error opening serial had worked fine just minutes ago).First I get a lot of weird char's, like you'd get trying to Serial.print a non-alphanumeric byte (although it was an int) - then, after fiddeling with the Serial rate from the IDE (while the Arduino program was still running), I got an error.Ctrl+c, ./arduino and "Upload to I/O Board"... Still get an error.I've tried rebooting Ubuntu, reinstalling the software, removing all components and reprogrammed the Blink-example with my Windows machine (which worked - so I doubt the board is damaged).Below is the full error message. I'm 100% sure the usb-device is correct.processing.app.SerialException: Error opening serial port '/dev/ttyUSB0'. at processing.app.Serial.
Assigned to Milestone gtkterm (Ubuntu) Edit Confirmed Undecided Unassigned Edit You need to log in to change this bug's status. Affecting: gtkterm (Ubuntu) Filed here by: jmr13031@gmail.com When: 2012-03-08 Confirmed: 2012-04-20 Target Distribution Baltix BOSS Juju Charms Collection Elbuntu Guadalinex Guadalinex Edu Kiwi Linux nUbuntu PLD Linux Tilix tuXlab Ubuntu Ubuntu Linaro Evaluation Build Ubuntu RTM Package (Find…) Project (Find…) Status Importance Confirmed Undecided Assigned to Nobody Me Comment on this change (optional) Email me about changes to this bug report Also affects project (?) Also affects distribution/package Nominate for series Bug Description OS: Ubuntu 12.04 LTS Beta 64 bit Program gtkterm Version 3.3.0 Expected: Under Ubuntu 11.10 I could just run gtkterm and select the "/dev" device as a standard user. Probelm : Gtkterm is not able to open the /dev devices. You have to open a shell and type "sudo gtkterm" to get it to work. See original description Add tags Tag help Whoopie (whoopie79) wrote on 2012-03-28: #1 Please check if you're are member of the dialout group. If not -> "sudo adduser YOUR_USER dialout" on the console Launchpad Janitor (janitor) wrote on 2012-04-20: #2 Status changed to 'Confirmed' because the bug affects multiple users. Changed in gtkterm (Ubuntu): status: New → Confirmed Tom (trsaunders) wrote on 2012-04-20: #3 I am having the same problem. Adding my user to dialout did not help. Of course I can create a udev rule for the device, but I didn't need to do this in previous versions of Ubuntu. fatih yucesoy (fyucesoy) on 2012-04-25 description: updated Wade Matthews (sungreentree) wrote on 2012-06-22: #4 Same: Last week I switched to Ubuntu 12.04 LTS 64 bit. Now my user can't access the serial ports. It affects not just gtkterm but other serial port programs as well. I didn't see this in prior Ubuntu versions. Adding my user to the dialout group made no difference. For now, I am running "sudo gtkterm" to get around psolyca (damien-gaignon) wrote on 2012-06-25: #5 Same with Ubuntu 12.04 LTS 64 bit and minicom. I have to use "sudo minicom" to connect to it. fulvio mingozzi (fulvio-mingozzi) wrote on 2012-07-06: #6 It works, but you have to change permission to the groups. Here the full commands: sudo adduser MyUser dialout sudo chmod a+rw /dev/ttyUSB0 Next boot USB0 retained these permissions: crw-rw---- 1 root dialout 188, 0 Jul 6 10:29 /dev/ttyUSB0 and so it is possible to run minicom from MyUser. Roger Davis (rogerdavis-d) wrote on 2012-10-27: #7 I get the following errors using efax-gtk --