AIS (for boats)

../_images/ais-daisy2.png

Rover-4.2.0 (and higher) support Automatic identification system (AIS) sensors allowing the position of manned boats to be displayed on the ground station

What to Buy

AutoPilot connection

The dAISy2 should be connected to one of the autopilot’s serial ports as shown below

../_images/ais-daisy2-autopilot.png

Autopilot Configuration

Connect to the autopilot with a ground station and set these parameters and then reboot the autopilot

  • AIS_TYPE = 1 (Enable)
  • SERIAL1_PROTOCOL = 40 (AIS) if the sensor is connected to serial port 1. If another serial port is used please set the appropriate SERIALx_PROTOCOL parameter
  • SERIAL1_BAUD = 38 (38400 bps) if using serial port 1. If another serial port is used please set the appropriate SERIALx_BAUD parameter instead
  • SR0_ADSB = 5 to enable sending AIS mavlink messages to the ground station over Serial0 (the USB port). If a telemetry radio is used the SRx_ADSB param corresponding to its serial port should also be set to 5(hz).

dAISy2 Configuration and Testing

  • Connect dAISy2 to your PC using a USB cable
  • Download, install and run a terminal program such as Putty
  • Connect to the dAISy2’s COM port at 38400 baud and press <ESC> to view the setup menu
  • Type “2” to enable the serial port. “38400 8N1 serial output (NMEA HS w/ adapter)” should be displayed
  • Type “T” to enable entering a test NMEA message and then copy-paste this message, “!AIVDM,1,1,,A,3815;hUw00wfUdHMPfQ4s8WT0D`r,0*00”
../_images/ais-daisy2-console.png
  • Connect to the autopilot with Mission Planner (or another ground station) and a boat should appear on the South West coast of England
../_images/ais-gcs.png
  • press <ESC> to stop sending test messages

Logging

The AIS_OPTIONS parameter specifies which AIS messages are logged. These messages are useful for debugging purposes and contain the following information

  • TimeUS : System time that the AIS message was received
  • Num : Number of fragments in the currently accumulating message
  • Total : Fragment number of this sentence
  • ID : Sequential message ID for multi-sentence messages
  • Payload : Data payload