[SOLVED] How to set non-root access to serial ports?

I have this device which is listed as
/dev/ttyUSB0
I need to
sudo chown sms /dev/ttyUSB0
every time I reboot. Normally I would think to add myself to some group but "tty" group is not doing the trick... proof:
[sms@sms-linux ~]$ groups sms
tty wheel sms
[sms@sms-linux ~]$ MinOZW
Starting MinOZW with OpenZWave Version 1.0.758
2014-03-15 06:32:07.921 Cannot find a path to the configuration files at ../../../config/, Using /usr/local/etc/openzwave/ instead...
2014-03-15 06:32:07.928 mgr, Added driver for controller /dev/ttyUSB0
2014-03-15 06:32:07.929 Opening controller /dev/ttyUSB0
2014-03-15 06:32:07.931 Trying to open serial port /dev/ttyUSB0 (attempt 1)
2014-03-15 06:32:07.933 ERROR: Cannot open serial port /dev/ttyUSB0. Error code 13
2014-03-15 06:32:07.935 ERROR: Failed to open serial port /dev/ttyUSB0
2014-03-15 06:32:07.936 WARNING: Failed to init the controller (attempt 0)
^C
[sms@sms-linux ~]$ sudo MinOZW
[sudo] password for root:
Starting MinOZW with OpenZWave Version 1.0.758
2014-03-15 06:32:23.776 Cannot find a path to the configuration files at ../../../config/, Using /usr/local/etc/openzwave/ instead...
2014-03-15 06:32:23.782 mgr, Added driver for controller /dev/ttyUSB0
2014-03-15 06:32:23.784 Opening controller /dev/ttyUSB0
2014-03-15 06:32:23.786 Trying to open serial port /dev/ttyUSB0 (attempt 1)
2014-03-15 06:32:23.794 Serial port /dev/ttyUSB0 opened (attempt 1)
Edit: yes, it was after logout and even reboot.
Last edited by smsware (2014-03-15 15:07:15)

Hi,
I also have a similar problem. I added myself to uucp group, but I still cannot access the serial port.
[manjaro@mycomp work]$ sudo gpasswd -a manjaro uucp
[sudo] password for manjaro:
Adding user manjaro to group uucp
[manjaro@mycomp work]$ groups manjaro
lp wheel uucp network video audio storage users
[manjaro@mycomp work]$ ls -l /dev/ttyUSB0
crw-rw---- 1 root uucp 188, 0 23.06.2014 21:32 /dev/ttyUSB0
[manjaro@mycomp work]$ lpc21isp firmware.hex /dev/ttyUSB0 19200 11059
lpc21isp version 1.97
File firmware.hex:
loaded...
Start Address = 0x00004F9C
converted to binary format...
image size : 30304
Image size : 30304
Can't open COM-Port /dev/ttyUSB0 ! (Error: 13d (0xD))
But when I try as root, it works:
[manjaro@mycomp work]$ sudo lpc21isp firmware.hex /dev/ttyUSB0 19200 11059
[sudo] password for manjaro:
lpc21isp version 1.97
File firmware.hex:
loaded...
Start Address = 0x00004F9C
converted to binary format...
image size : 30304
Image size : 30304
Synchronizing (ESC to abort)..... OK
Read bootcode version: 13
Download Finished... taking 27 seconds
Now launching the brand new code
Do you have any idea what I am doing wrong?
Last edited by manjaro (2014-06-23 19:57:40)

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[SOLVED] How to set non-root access to serial ports?

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