How do I connect to a terminal to a serial-to-USB device on Ubuntu 10 10 Maverick Meerkat

Question

I am trying to connect minicom to a serial device that is connected via a USB-to-serial adapter  This is a PL2303 and from everything I ve read no additional drivers are required  The device is recognised as a PL2303   I m a beginner at minicom  Is this the correct command to execute  Or do I need to configure something     sudo minicom --device  dev ttyUSB0 minicom  cannot open  dev ttyUSB0  No such file or directory    sudo lsusb -v  Bus 002 Device 006  ID 067b 2303 Prolific Technology  Inc  PL2303 Serial Port Device Descriptor    bLength                18   bDescriptorType         1    tail  var log syslog   then removed and attached the device  Mar 13 23 31 49 ubuntu kernel   807996 786805  usb 2-1  pl2303 converter now attached to ttyUSB0 Mar 13 23 34 44 ubuntu kernel   808172 155129  usb 2-1  USB disconnect  address 7 Mar 13 23 34 44 ubuntu kernel   808172 156321  pl2303 ttyUSB0  pl2303 converter now disconnected from ttyUSB0 Mar 13 23 34 44 ubuntu kernel   808172 156374  pl2303 2-1 1 0  device disconnected Mar 13 23 34 52 ubuntu kernel   808179 497856  usb 2-1  new full speed USB device using uhci hcd and address 8 Mar 13 23 34 52 ubuntu kernel   808179 785845  pl2303 2-1 1 0  pl2303 converter detected Mar 13 23 34 52 ubuntu kernel   808179 872309  usb 2-1  pl2303 converter now attached to ttyUSB0

User · Answer

You will need to set the permissions every time you plug the converter in. I use PuTTY to connect. In order to do so, I have created a little Bash script to sort out the permissions and launch PuTTY:

#!/bin/bash
sudo chmod 666 /dev/ttyUSB0

putty

P.S. I would never recommend that permissions are set to 777.

User · Answer

Putty on ubuntu There is no need to install the driver for PL2303 So only type the command to enable the putty Sudo chmod 666  dev ttyUSB0 Done Open the putty

User · Answer

Long time reader  first time helper      I m going through the same hellish experience here with a Prolific USB  lt   Serial adapter and so far Linux is the easiest to get it to work   On CentOS  I didn t need to install any drivers etc   That said    dmesg   grep -i tty or dmesg   grep -i usb showed me  dev ttyUSB0   screen ttyUSB0 9600 didn t do the trick for me like it did in OSX minicom is new to me but it was complaining about lack of  dev modem   However  this helped  https   www centos org forums viewtopic php t 21271  So install minicom  yum install minicom  then enter its settings  minicom -s     Then select Serial Port Setup and change the Serial Device  Option A  to  dev ttyUSB0  or whatever your device file is as it slightly differs per distro    Then change the Bps  Option E  to 9600 and the rest should be default  8N1 Y N   Save as default  then simply minicom and Bob s your uncle   HTH

User · Answer

The serial port communication programs moserial or gtkterm provide an easy way to check connectivity and modify  dev ttyUSB0  or  dev ttyUSB1   settings  Even though there maybe only a single USB to RS232 adapter  the n designation  dev ttyUSBn can and does change periodically  Both moserial and gtkterm will show what port designation is relevant in their respective pull down menus when selecting an appropriate port to use   Check out help ubuntu com community Minicom for details on minicom

User · Answer

First check with dmesg   grep tty if system recognize your adapter  Then try to run minicom with sudo minicom -s  go to  Serial port setup  and change the first line to  dev ttyUSB0    Don t forget to save config as default with  Save setup as dfl   It works for me on Ubuntu 11 04 on VirtualBox

User · Answer

I just got my GUC232A cable with a molded-in PL2302 converter chip   In addition to adding myself and br to group dialout  I found this helpful tip in the README Debian file in  usr share doc bottlerocket      This package uses debconf to configure the  dev firecracker symlink    should you need to change the symlink in the future run this command       dpkg-reconfigure -pmedium bottlerocket      That will then prompt you for your new serial port and modify the   symlink  This is required for proper use of bottlerocket    I did that and voila  bottlerocket is able to communicate with my X-10 devices

User · Answer

I had the exact same problem  and it was fixed by doing a chmod 777  dev ttyUSB0  I never had this error again  even though previously the only way to get it to work was to reboot the VM or unplug and replug the USB-to-serial adapter  I am running Ubuntu nbsp 10 04  Lucid Lynx  VM on OS nbsp X

User · Answer

I had fix this with adduser  username  dialout  I never had this error again  even though previously the only way to get it to work was to reboot the PC or unplug and replug the usb to serial adapter

User · Answer

I get get the same minicom error   cannot open  dev ttyUSB0  No such file or directory   Three notes    I get the error when the device attached to the serial port end of my Prolific Technology PL2303 USB Serial adapter is turned off  After turning on the device  an embedded controller running Linux  minicom connected fine  I have to run as super user  i e  sudo minicom  Sometimes I have to unplug and plug back in the USB-to-serial adapter to get minicom to connect to it    I am running Ubuntu 10 04 LTS  Lucid Lynx  under VMware  running on Windows nbsp 7   In this situation  make sure the device is attached to VM operating system by right clicking on the USB Serial USB icon in the lower right of the VMware window and select Connect  Disconnect from Host    Remember to press Ctrl   A to get minicom s prompt  and type X to exit the program  Just exiting the terminal session running minicom will leave the process running

User · Answer

I suggest that newbies connect a PL2303 to Ubuntu  chmod 777  dev ttyUSB0  file-permissions  and connect to a CuteCom serial terminal   The CuteCom UI is simple   intuitive   If the PL2303 is continuously broadcasting data  then Cutecom will display data in hex format

[linux] How do I connect to a terminal to a serial-to-USB device on Ubuntu 10.10 (Maverick Meerkat)?

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