Revision history [back]

Check the permissions of your USB device. ls -l /dev/ttyACM0

if they're not sufficient, you can add them by typing 'sudo chmod a+rw /dev/ttyACM0'.

However this will need redoing every time you unplug and replug it in. (This is due to how Ubuntu handles device permissions). To make it permanent you need do change/add the 'udev' rules for the arduino device. Here's a similar question about udevs, which might help: http://answers.ros.org/question/9097/how-can-i-get-a-unique-device-path-for-my-arduinoftdi-device/