Hi @dben45, welcome to the forum 
Sorry to hear you’re having issues getting your Ping Sonar connected.
That’s potentially concerning, and points to some kind of hardware/electrical issue. It may be drawing too much power for your supply, although given you’re using a recent BlueROV2 that shouldn’t be the case with a properly working sensor.
There are still a few things to try in our troubleshooting page; in particular
- confirming that the USB to serial converter is working (for our BLUART:
- green PWR LED turns on when plugged in to computer,
- FTDI FT231X USB UART device shows up in the connected USB/serial devices list,
- has occasional flashes of the green TX LED when Ping Viewer is searching for a Ping device)
- making sure the wires are connected correctly, and
- trying the device recovery procedure.
If those don’t help, please contact support@bluerobotics.com to let them know what’s going on, and sort out a replacement or refund as appropriate. If you do so, please include your order number (/ estimated order date) and a link to this thread