I am trying to use the Fathom S for an ROV I am building. I would like to use an arduino to interface to the topside board instead of a computer. I tried to use the arduino usb host example code for ftdi, but it did not seem to produce an output signal on the tx. When I use my computer to interface to the topside board, I can get a signal on the tx pin. Does anyone have experience using the topside board with an arduino and is using a usb host shield the preferred interface method?