No it doesn't.

From: ml@mail.tsaitgaist.info To: baseband-devel@lists.osmocom.org Subject: Re: Cannot open serial device /dev/ttyUSB0 Date: Tue, 4 Jun 2013 11:29:13 -0700

Excerpts from George Andguladze's message of 2013-06-04 10:40:35 -0700:

...

Cannot open serial device /dev/ttyUSB0

I am getting this error message when I try to connect to my C155 phone and upload hello_world.compalram.bin using this command:

./osmocon -p /dev/ttyUSB0 -m c155 ../../target/firmware/board/compal_e99/hello_world.compalram.bin

Even though device ttyUSB0 exists in my /dev/ directory, and I have set modprobe cp210x, and chmod 777 /dev/ttyUSB0.

instead of setting 777 permissions on this device, you can simply add yourself to the dialout group (it's the more proper way) here the debian command (don't forget to log out and in again for this to take effect) sudo adduser $USER dialout

...

crw-rw---- 1 root dialout 4, 71 2013-06-04 20:40 /dev/ttyS7 crw-rw---- 1 root dialout 4, 72 2013-06-04 20:40 /dev/ttyS8 crw-rw---- 1 root dialout 4, 73 2013-06-04 20:40 /dev/ttyS9 crwxrwxrwx 1 root dialout 188, 0 2013-06-04 21:07 /dev/ttyUSB0

What is it that I am doing wrong?

does it work with root rights (using sudo)?

kevin