Serial Port /dev/ttyacm0 Not Found

Could not open port /dev/ttyAMA0: [Errno 2] No such file or directory: '/dev/ttyAMA0' I am using cp2102 usb to uart bridge which is installed on linux kernel 3.x.x >>> import serial. Stack Overflow. Serial Error: Port /dev/ttyACM0 does not exist Before the reboot the Zwave binding and the zwave controller worked fine. But the serial port is available in the system. Note: we already have similar question here, but the solution was to use package from umake, not fix for the Snap. So my question is: How to make Arduino (Snap) access serial port /dev/ttyUSB0 (or /dev/ttyACM0)? Update: connecting serial-port to the snap fails with the following message.

• Serial Port '/dev/ttyacm0' Not Found
• Serial Port /dev/ttyacm0 Not Founded
• Serial Port /dev/ttyacm0 Not Found Dead
• Arduino Serial Port '/dev/ttyacm0' Not Found

using --device=/dev/ttyACM0 on docker commandline..
the 'serial in' node cannot connect due to Permisson error - from the log in th edocker:

[error] serial port /dev/ttyACM0 error: Error: Error: Permission denied, cannot open /dev/ttyACM0

It may be due to user node-red not having access to /dev/
I have tried editing the Dockerfile to remove USER node-red (to run Node-Red as root but serial then produces these errors (on LATEST docker - not RPI):

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[warn] [serialport] Error: Could not locate the bindings file. Tried:
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/build/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/build/Debug/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/build/Release/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/out/Debug/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/Debug/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/out/Release/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/Release/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/build/default/serialport.node
→ /usr/src/node-red/node_modules/node-red/node_modules/node-red-node-serialport/node_modules/serialport/compiled/4.6.0/linux/x64/serialport.node

Any idea how I can get a serial pass through to work on the official Docker image (it works on my unofficial version)

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 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:

nothing happens. Ww greener shotguns serial numbers. 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!

nelsonda

Serial Port '/dev/ttyacm0' Not Found

5 Answers

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 $USER

RinzwindRinzwind

I couldn't get Rinzwind's suggestion to work, because it complained that the user account already exists. Instead, I used this command to add an existing user (terrik) to an existing group (dialout), as described on the Ubuntu Help Wiki.

Also useful is this command for listing your current groups, although as Rinzwind says, you have to log out and log in before the serial port starts letting you in.

I couldn't get Terrik's answer working, but I could if I made this slight adjustment to the path for ttyACM0.

Would post as a comment but I don't have the privileges for that yet..

Another possibility is to make a rules file in /etc/udev/rules.d/ directory. I had similar problem and I have created 50-myusb.rules file in the above directory with this content:

Note that this will give any device connected to ttyACM socket read/write permissions. If you need only specific device to get read/write permissions you must also check idVendor and idProduct. You can find those by running lsusb command twice, once without your device connected and once when it is connected, then observe the additional line in the output. There you will see something like Bus 003 Device 005: ID ffff:0005. In this case idVendor = ffff and idProduct = 0005. Yours will be different. Than you modify the rules file to:

Now only this device gets the permissions. Read this to know more about writing udev rules.

Serial Port /dev/ttyacm0 Not Founded

NonStandardModelNonStandardModel

Try going into System / Users and Groups and checkeing the box on your username in the TTY Group.

Eliah Kagan

protected by Community♦Jan 19 '17 at 13:16

Serial Port /dev/ttyacm0 Not Found Dead

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Arduino Serial Port '/dev/ttyacm0' Not Found

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