1. I get an error message: Opening device failed. Access denied.

Usually, only root has permissions to read from USB devices. To allow a normal user to do so, follow these steps:

• Create a file called pegasus.rules in /etc/rules.d/
• Write the following line into this file:

  ATTRS{idVendor}=="0e20", ATTRS{idProduct}=="0101", OWNER="your-login-name"
  

  Change your-login-name to your actual login name. (Keep the quotes.)
• Restart udev by typing "/etc/init.d/udev restart" (without the quotes), plug your device off and on again.