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Topic: Re: Dreaded Serial Monitor -- Xubuntu 13.04 [SOLVED] (Read 388 times) previous topic - next topic

Dec 03, 2013, 03:47 am Last Edit: Dec 03, 2013, 05:14 am by waldzinator Reason: 1
Hi,

I seem to be experiencing the somewhat common issue where my serial monitor won't work.  Prior to uploading a sketch, the Serial Port is listed as /dev/ttyACM0 and checked.  Once I upload and open the serial monitor, there is not output showing and the Serial Port menu option greys out.  I've read through several of the posts about the Cannot find /dev/ttyACM0 issue, and I walked through some of the remediation steps.  None of them seems to fix my issue.  

Ran
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groups and determined I was a member of the dialout group, but not tty group.  I added myself.  Still not working.

Next, I verified that my
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/.arduino/Preferences.txt file listed the default serial.debug baud rate at 14400.  I set it to 9600 and changed file permission to read only.  Still no fix.

I tried changing the permission on the ttyACM0 port to rw.  When I
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sudo chmod 777 /dev/ttyACM0, I get the output that no file exists.  Indeed, if I browse to ./dev, I don't see this port listed

EDIT - I didn't realize that my arduino wasn't plugged in when I searched for /dev/ttyACM0.  I subsequently ran:
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ls -l /dev/ttyACM?,
which returned
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crw-rw---- 1 root dialout 166, 0 Dec  2 22:22 /dev/ttyACM0

Honestly, never had to use the serial monitor on my netbook (I moved all my Arduino projects over to this for portability --- it's a homebrewing project), so I didn't know this was an issue.  I needed to debug some stuff, so I really need it now!  Help!

After plugging in Arduino, I was able to:
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sudo chmod 777 /dev/ttyACM0


Yay.  If anything, hopefully somebody finds my thought and work process helpful, as it seems like many Linux users have come across this issue.

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