The ultimate partner for the HP Prime G2 - The Arduino Leonardo.

[matalog]

You should install this on your Arduino: https://www.arduino.cc/reference/en/libr...d-project/ - I used the RawHID example to start with.

It will complie with the Arduino IDE software, available from this site: https://www.arduino.cc/en/software

You should familiarise yourself with sending some example programs to the Arduino first, link Blink, so that you can verify it works and you can upload to it. Then compile the HID software linked above, and you will be able to connect with your HP Prime. You have to write software on both ends to enable communication the way you need it.