Additionally, I’d like to respond to Nick’s list above.
RE: M9 comms – There is currently a known issue with the USB drivers in newer Dell Rugged laptops. If you have a new issue with connecting to an M9 or S5 with the radio AND have a new rugged Dell laptop this is likely the cause. see: https://internationalhydrometrygroup.org/forums/topic/dell-ftdi-drivers#post-677. Otherwise, make sure you are running the most recent version of the firmware and RiverSurveyor Live or RiverSurveyor Stationary Live. Data handling and communications improvements have been made.