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Arduino program only works when run as root

Uploading simple sketches seems to work when I run the Arduino program as root (sudo). I would like to run it as a regular user. Has anyone faced the same problem before and fixed it?

Here is what I obtained from lsusb:

$ lsusb
Bus 002 Device 022: ID 2341:0043 Arduino SA Uno R3 (CDC ACM)

And the Arduino program identifies it as /dev/ttyACM0. Here are its permissions: 

$ ls -l /dev/ttyACM0 
crw-rw---T 1 root dialout 166, 0 Mar 14 22:03 /dev/ttyACM0

Here is the output from id

groups=1000(abhiram),20(dialout),24(cdrom),25(floppy),29(audio),
30(dip),44(video),46(plugdev),105(scanner),110(bluetooth),112(netdev)

When I upload an sketch from the examples, as a regular user, I encounter this error:

avrdude:stk500_recv(): programmer not responding

Any suggestions are welcome.

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2
  • Yes, it's worth checking the actual owning group. Also the device file can be either a ttyUSB# or a ttyACM# (or theoretically anything) depending on the board type, kernel driver, and ultimately configuration of udev or whatever creates the nodes. Commented Apr 6, 2014 at 0:18
  • It's also mentioned at arduino.cc/en/Guide/Linux#toc6 Commented Mar 18, 2017 at 22:43