hi, I have a problem with the communication between pc and arduino board.. I installed the arduino software but when I want choose the port on which arduino will communicate with pc, ttyS0 is the only port available.. I think that I need to use ttyUSB0 port, but it is not shown in the list.. can you help me????? =(
It was discussed today:
sorry, I can't speak english very well and I don't understand how I can solve the problem.. can you make me a summary? 
which version of ubuntu are you running?
Which arduino board and arduino software version? Uno requires at least arduino software version 0021.
mrtaylor:
which version of ubuntu are you running?
Which arduino board and arduino software version? Uno requires at least arduino software version 0021.
os: ubuntu 10.10
board: arduino duemilanove
software: arduino IDE v.18
I think that I need to use ttyUSB0 port
You are correct. /dev/ttyUSB?
If the duemilanove has power
First thing I would do is try a different usb cable.
Then I would try running the arduino software as root (sudo arduino).
If running as root works:
run the command "id" to ensure to you are a member of the dialout group. Add your user id to /etc/group if required
If running as root did not work (with the duemilanove plugged into the usb port):
execute the command "dmesg". look for a entry that looks like, "FTDI USB Serial Device converter now
attached to ttyUSB0"
execute the command "lsusb", look for the entry, "Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC"
Post the output of these command.
mrtaylor:
I think that I need to use ttyUSB0 port
You are correct. /dev/ttyUSB?
If the duemilanove has power
First thing I would do is try a different usb cable.
Then I would try running the arduino software as root (sudo arduino).
If running as root works:
run the command "id" to ensure to you are a member of the dialout group. Add your user id to /etc/group if required
If running as root did not work (with the duemilanove plugged into the usb port):
execute the command "dmesg". look for a entry that looks like, "FTDI USB Serial Device converter now
attached to ttyUSB0"
execute the command "lsusb", look for the entry, "Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC"Post the output of these command.
If I running arduino with "sudo arduino" it show me "ttyUSB0"!!! now pc and arduino can communicate!! thank you
Your welcome