Conversing with your Laser Printer:(See disclaimer below)
To extract information from your printer in PJL telnet to its IP address, port 9100 (or by serial, see below), and send it these commands:
Then copy and paste the following commands:
To access USB Host mode on the Touchpad (to plug in a Keyboard/USB Drive/etc), you need:
Although this is an article on hardware, I'm going to be using software to probe it. This is from a 32GB HP Touchpad, though the 16GB should be the same, barring the difference in storage.