May I ask what the --usb command is for? I'll just have it plugged into the second USB slot on my RPi. Should I just change the --usb code to 1:2 then?
Thanks for the help by the way.
The --usb option will allow you to add a parameter to select the devices to be used by your miner software. You have to test and see where your harware is connected.
Try this command:
lsusb
It will list your devices so that you can choose the ones to use with your software