Thanks guys and gals! CA-42 cable works a treat! Edit: to be more specific, the cable I used is actually a DKU-5, I was told it is functionally the same as CA-42. The main difference is that CA-42 has 5 wires, where DKU-5 only has 3 and they are GND, RX, TX. Not sure what the extra 2 wires in CA-42 are for, but it doesn't matter in this case.