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I'm using an Ubuntu 14.04 and I'm having trouble with port permission for /dev/ttyACM0 . Every time I plug in my arduino uno board to my laptop, I face problems uploading code to the board beacuse I get a 'Permission Denied' error.

The problem was resolved when I gave the port Read-Write access with sudo chmod 666 /dev/ttyACM0, but only temporarily. The permission error reoccurs when I disconnect and reconnect the arduino board.

I followed this thread to make the change permanent by adding my username to the dialout group, but it didn't work.

Is there any other way to resolve this issue??

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SY_13
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1 Answers1

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add yourself to the dialout group, as described in thread you mentioned, then log out and back in. Now it should work. This is because the modification won't take effect until your current session is closed and a new one is started.

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