Electronics

Lille Ø has an onboard NMEA 2000 bus as well as a TCP/IP network.

NMEA 2000

The boat's NMEA 2000 (N2K) backbone runs from bow to the technical compartment. The bus contains the following devices:

Bow

• Orca Core GPS and gyrocompass
• Airmar P79 depth sounder

Technical compartment

• 2✕ B&G Triton2 instrument displays
• Yacht Devices YDNR-02 router connecting the following to N2K:
  • Raymarine ST4000+ autopilot
  • LCJ Capteurs CV7 ultrasonic wind sensor
  • Actisense DST-2 digitizer for Sumlog paddle wheel and NASA depth transducer
• AMEC WideLink B600 AIS transponder
• Raspberry Pi 4 with Sailor Hat and Signal K

Stern

• B&G ZG100 GPS

Rebooting NMEA2000

The Triton2 instruments become occasionally unresponsive after running for a longer time (typically multiple weeks). The solution is to restart them. Easiest option is by rebooting the entire N2K bus.

• Turn Navigation Instruments circuit off
• Wait 10 seconds and turn the circuit back on
• Raspberry Pi needs to refresh the CAN interface to see NMEA2000 data. Either reboot it, or preferably:
  • SSH to the RPi ssh pi@lille-oe-pi.local
  • Run sudo ifdown can0
  • Run sudo ifup can0

Settings for YDNR-02

The YDNR-02 NMEA2000 to SeaTalk interface box sometimes loses its state when NMEA2000 is restarted. If this happens (usually seen by there suddenly being a YDNR WiFi hotspot and STW not being sent), here are the steps to set it up:

1. Connect to WiFi and set WiFi client to Lille Oe
2. Enable NMEA Server 2 (port 1457), direction Both
3. Route only SeaTalk and NMEA0183 ports to send to Server 2
4. Set NMEA port speeds to 4800bps
5. NMEA settings: generate $STALK sentences
6. Set SeaTalk whitelist to

ALK APB S82 S85 S86 S9E SA1 SA2 MWV S10 S11 VTG S53 S52 S99 STA

Autopilot

The boat is equipped with a Raymarine ST4000+ tiller pilot. The fluxgate compass is inside the cabin next to the saloon forward bulkhead. Autopilot course computer is in the cockpit near the companionway.

The autopilot can be set to steer a compass course or a wind angle.

In addition to the course computer, the autopilot can also be controlled remotely via Signal K.

NMEA0183 stream

A NMEA0183 formatted stream of key information from the NMEA 2000 bus is broadcasted via UDP on port 2000 in the boat WiFi network.

Remote monitoring

The state of boat systems is continuously logged to multiple online services, and can be remotely monitored via:

• Victron VRM
• PostgSail

This is handled by the combination of a Victron Cerbo GX system and Signal K.