NMEA2000 | NMEA2000 library for Arduino

NMEA2000 is inherited from CAN. Many MCUs like Teensy >3.1, ESP32, Arduino Due has already CAN controller inside. If your MCU does not have CAN controller inside or you need second external CAN controller, you can use e.g. MCP2515 CAN controller, which is supported by library. For final connection to the bus you need CAN bus_transceiver chip. Devices on NMEA2000 bus should be isolated to avoid ground loops. So if you take power from NMEA2000 bus and your device is not connected to ground enywhere else, you can use unisolated tranceiver like MCP2551, MCP2562 or SN65HVD234. If you instead feed power to your device directly or e.g. use engine own sensors for measuring, you have to use isolated tranceivers like ISO1050. Remember also use isolated power supply, if you take power from bus and have any unisolated connection to anywhere on your whole system. Easiest for connecting to NMEA2000 bus is to use some ready shield. In case you build your tranceiver connection by yourself there are some connection examples under documents. Library has been also used with Maple Mini board.
Teensy 3.2 http://skpang.co.uk/catalog/teensy-canbus-breakout-board-include-teensy-32-p-1507.html
ESP32 https://www.tindie.com/products/fusion/can32-an-esp32-dev-board-with-can-bus-v21/
Arduino Due http://skpang.co.uk/catalog/dual-can-bus-interface-for-arduino-due-p-1579.html
Arduino Mega https://wiki.seeedstudio.com/CAN-BUS_Shield_V1.2/ Note that there are several different shields for CAN bus available and others may use 8 MHz chrystal instead of default 16 MHz chrystal. This must be set before including NMEA2000_CAN.h
Teensy 3.2 Teensy_Actisense_listener_sender_schematics.pdf
Arduino due ArduinoDUE_CAN_with_MCP2562.pdf ArduinoDue_CAN_with_SN65HVD234.jpg
Arduino Mega ArduinoMega_CAN_with_MCP2515_MCP2551.pdf
ATmegaxxM1 ATmegaxxM1%20CAN%20example.pdf
You need at least Arduino Software 1.6.6 for this sample. I’ll expect you are familiar with Arduino and using libraries. When your Arduino environment is ready,. Now you are ready to play with your own device. Check also the NMEA2000\Examples\ActisenseListener, which reads all data from NMEA2000 bus and sends it to PC. NMEA2000/Examples/ArduinoGateway allows you to mimic Actisense NGT-1 and connect e.g. a Raspberry Pi running Signal-K to the NMEA2000 bus with an Arduino or Teensy.
Download NMEA2000 library zip.
Depending of your board download libraries as zip: For Teensy 4.x - works also with 3.1/3.2/3.5/3.6, but is under tests. NMEA2000_Teensyx Remember also install Teensyduino! For Teensy 3.1/3.2/3.5/3.6 NMEA2000_teensy FlexCAN_Library Remember also install Teensyduino! Note that on installing Teensyduino you should not install FleCAN with it. For ESP32 NMEA2000_esp32 For Arduino due NMEA2000_due due_can For external CAN bus controller MCP2515 like with Arduino Mega CAN shields https://github.com/ttlappalainen/NMEA2000_mcp mcp_can
Install all libraries to your Arduino IDE (Sketch-Include Library-Add .ZIP library).
Open NMEA2000\Examples\TemperatureMonitor.
Connect you board to USB and NMEA2000 bus.
Send sketch to your board.
If you have Multi Function Display (e.g. Garmin GMI-20) on your NMEA2000 bus, you should see on it’s NMEA2000 bus devices new device "Simple temp monitor" on the list.