- #How to builda nmea 2000 network how to
- #How to builda nmea 2000 network install
- #How to builda nmea 2000 network serial
- #How to builda nmea 2000 network code
#define ENABLE_DEBUG_LOG 0 // Debug log, set to 1 to enable AIS forward on USB-Serial / 2 for ADC voltage to support calibration To adjust the program to your need please change the following values in the code: 15 for 100K / 27K which gives a range from 0 to 15 Volt).
#How to builda nmea 2000 network code
You have to set the calibration information in the code according to the real values of the resistors at the ADC input of the ESP 32 (e.g. The ADC of the ESP32 is a bit difficult to handle. The 12 Volt is reduced to 5 Volt with a DC Step-Down_Converter (D24V10F5, ). With this new configuration evrything works without problems. A reboot confused the wind instrument (no TWS). It looks like pin 2 is used during reboot and also during programming. But I noticed problems with the NMEA2000 bus during reboot/programming of the ESP32. The standard configuration of the NMEA2000 library would block the Serial2 connection used for AIS. It works well with the ESP32.įor the Gateway, I use the pins GPIO4 for CAN RX and GPIO5 for CAN TX.
#How to builda nmea 2000 network install
The code is based on the NMEA 2000 / NMEA0183 libraries from Timo Lappalainen ( ).ĭownload and install the libraries from GitHub link above: JSON interface on port 90 to request NMEA2000 data via JSON request (see M5Stack Display repository for example on usage).Showing fridge temperature in web browser (nice JavaScript gauge).Acknowledgement of alarm with a button.Checking voltage and temperature levels against predefined values and generating an alarm with a piezo alarm buzzer.True parallel processing: Reading OneWire sensor as isolated task on second core of ESP32 (sensor reading is blocking for about 750 ms).Fridge temperature with a Dallas DS18B20 OneWire sensor (easily extendable with more sensors).Battery voltage is measured with the ESP32 ADC.Sending battery voltage and fridge temperature as NMEA2000 sentence (engine dynamic parameter PGN, my eS75 Ramarine MFD shows this as cooling temperature and alternator voltage).Mutiplexing AIS information into TCP streams (to support applications that can handle only one (TCP) connection.
#How to builda nmea 2000 network serial
Forwarding serial NMEA0183 AIS information (on RX2) as UDP broadcast stream (for Navionics on tablets, but also for OpenCPN).This allows use of OpenCPN WindHistory Dashbord instument. Calculating TWS/TWD from apparent wind information and heading/COG).Forwarding navigation information from NMEA2000 to NMEA0183 as TCP stream (including log, water temp, and rudder information).Alternatively it can also connect as client to a WLAN network (set WLAN_CLIENT to 1 to enable).Providing a WiFi Access Point for other systems like tablets or computer (e.g.The Gateway supports the following functions: Pin layout for other ESP32 devices might differ. The ESP32 in this project is an ESP32 NODE MCU from AzDelivery.
#How to builda nmea 2000 network how to
The measurement is taken on the supply pair (Red and Black).įor more information on NMEA 0183 and how it works, please download our free guide to NMEA 0183 networking.įor more information on NMEA 2000 and how it works, please download our free guide to NMEA 2000 networking.This repository shows how to build a NMEA2000 WiFi Gateway with AIS multiplexing and voltage/temperature alarms. The nominal value when testing with Network Power on is 12-13.84V. To test the resistance, the network power should be OFF, and the resistance measurement is done on the comms pair (Blue and White Wires). 120 ohms means there is only 1 terminator, and 40 or less means there are too many terminators on the bus. Your network should measure 60 ohms when resistance tested.