unable to connect to pioneer using /dev/ttyUSB0

[Alex R]

Hi,

I have been so far running the pioneer p3dx by first running 

$ sudo chmod a+rw -R /dev/ttyUSB0

I am connecting the robot via serial to USB connection through my computer.

and then bringing up the rosaria for running the robot.  So far ther was never a problem.

Today, I am getting errors when I run the sudo chmod a+rw -R /dev/ttyUSB0 , I am getting 

chmod: cannot access `/dev/ttyUSB0': No such file or directory

when I run

ls -l /dev/ttyUSB0

I get 

ls: cannot access /dev/ttyUSB0: No such file or directory

I have already added my self to the dialout group. And I was running the command successfully before

Can someone help me with this? 

Thanks 

Alex

[Aris Synodinos]

Hello Alex,

Can you send us the output of 

ls -l /dev/ttyU*


Regards,
Aris

--
http://www.ros.org/wiki/sig/robots/Pioneer

--

Aris Synodinos
PhD Student
Robotics Group
Mechanical and Aeronautics Engineering Department
Tel. +30-2610-996248
e-mail: asyn...@mech.upatras.gr
Web: http://robotics.mech.upatras.gr/

[Alex R]

Hi Aris,

I am getting this as the output :

ls: cannot access /dev/ttyU*: No such file or directory

Thanks

Alex

[Aris Synodinos]

Are you sure the USB to Serial converter is functioning correctly? 
Try reconnecting the USB to Serial device. If nothing happens, send as the last 10 lines of the output of `dmesg' exactly after you have plugged the USB to Serial Converter. 

[Alex R]

Hi ,

The problem was with the serial to usb cable. Replacing the cable solved the problem. But the same cable runs perfectly on a different pioneer. 

Strange, but for the time being it solved the problem. Thanks for your answers.

Alex