Overview
You have an excellent setup with Starlink, reverse SSH, and Linux on your boat. To control your new Yamaha HARMO outboard with NMEA 2000 using Linux autopilot software, you need a bridge between the NMEA 2000 network and your Linux computer.
(NMEA 2000)
(PyPilot/OpenCPN)
Remote Access
Cheapest Reliable Solutions
Here are your best options for connecting NMEA 2000 to your Linux system, from most to least expensive:
Option 1: Actisense NGT-1 with open-source drivers
The Actisense NGT-1 is the most reliable USB-to-NMEA 2000 gateway. It works well with Linux using the canboat or actisense-serial open-source software.
- Pros: Extremely reliable, industry standard, excellent Linux support via open-source tools
- Cons: Most expensive option
- Setup: Plug into NMEA 2000 network and USB port, install canboat utilities
Option 2: ShipModul MiniPlex-3N2K
A versatile device that converts between NMEA 2000, NMEA 0183, USB, and Ethernet. Works well with Linux via serial or TCP connection.
- Pros: Multiple interface options, includes WiFi, can merge data streams
- Cons: More complex to configure
- Setup: Connect to NMEA 2000, then use USB or Ethernet to Linux
Option 3: DIY with Raspberry Pi + CANable
The most budget-friendly option: Use a Raspberry Pi with a CANable (CAN bus adapter) as a NMEA 2000 to WiFi/Ethernet gateway.
- Pros: Very inexpensive, flexible, can run Signal K Node server directly on Pi
- Cons: Requires DIY setup, less plug-and-play
- Setup: Connect CANable to NMEA 2000 and Raspberry Pi, install can-utils and Signal K
Option 4: Yacht Devices YDNC-05
Ethernet-to-NMEA 2000 gateway that connects directly to your network. Your Linux computer can talk to it over TCP/IP.
- Pros: Network-based, can be placed anywhere on boat network
- Cons: Requires Ethernet infrastructure
- Setup: Connect to NMEA 2000 and Ethernet switch, configure IP address
My Recommendation for Your Setup
Given your existing Linux computer with Starlink and reverse SSH, I recommend Option 1: Actisense NGT-1 for reliability or Option 3: Raspberry Pi + CANable for lowest cost.
The Actisense is proven marine hardware that will work reliably in the marine environment. The Raspberry Pi solution is significantly cheaper but requires more technical setup and may be less reliable in harsh conditions unless properly protected.
Software Integration
Once you have the hardware interface, here's how to connect it to your autopilot software:
With PyPilot
- PyPilot can read NMEA 2000 data via Signal K
- Set up Signal K Node server on your Linux computer
- Configure Signal K to read from your NMEA 2000 interface (using canboat or actisense-serial)
- Configure PyPilot to use Signal K as data source
With OpenCPN
- OpenCPN can connect directly to NMEA 2000 via the canboat plugin
- Install OpenCPN plugin "NMEA 2000" or "canboat"
- Configure plugin to read from your USB NMEA 2000 device
With Signal K
- Signal K is the modern marine data standard and works as a hub
- Install Signal K Node server on your Linux computer
- Configure NMEA 2000 connection using appropriate plugin (canboat, actisense, etc.)
- Connect PyPilot and OpenCPN to Signal K for data
Implementation Steps
- Purchase your chosen NMEA 2000 interface
- Connect it to your boat's NMEA 2000 backbone (Micro-C connector)
- Connect the interface to your Linux computer (USB, Ethernet, or via Raspberry Pi)
- Install necessary software on Linux:
can-utilsfor CAN bus accesscanboatfor NMEA 2000 decoding- Signal K Node server
- PyPilot and/or OpenCPN
- Configure the software to communicate with your interface
- Test autopilot control via your reverse SSH connection