I am at the step where I am supposed to type ‘AT’ in the window. For some reason, I am not able to type anything – it’s like the keyboard just stops working…except it is. The keyboard works just fine before this step (where I am entering the letters to set up the port) and it works just fine after I close out of the terminal window. It is just at this particular point, after I switch the serial port to ttyUSB2 and exit that they keyboard no longer works. I have even tried typing ‘AT’ with a virtual keyboard (matchbox), but nothing will work.