NMEA2000
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ttlappalainen
NMEA2000 master or slaver ？
There is no master or slave on NMEA2000 bus. All devices acts as devices and they can listen traffic from all other devices or send data to bus so that any device on bus can use it. In listen and send mode library adds certified ready device to the bus.
@ttlappalainen thank you so much！
Now, I have a project based on the can bus, the application layer protocol is NMEA2000
Can this library be used in real projects? Can it meet the requirements?
hardware， I choice arduino due
thank you！
craig
Yes you can. As I mentioned the library is certification ready. See issue https://github.com/ttlappalainen/NMEA2000/issues/105. For full certification you need to save some parameters from library to somewhere e.g. EEPROM to be restored on system start. Also you need to join NMEA community (800 $/year) to get manufacturer number, buy product number and certification costs. Totally some thousand dollars.
About OpenSkipper Welcome to the OpenSkipper project, which provides Open Source C# code for Windows for integrating and displaying NMEA 0183, NMEA 2000 and AIS data from nautical instruments, GPS units and internet data sources. OpenSkipper can be run on a laptop aboard your boat to show electronic instruments displaying speed, heading, etc. Open Skipper can also receive and transmit data over multiple connections, including a serial port (for NMEA 0183), an ActiSense NGT-1-USB NMEA-2000-to-USB converter to read NMEA 2000 (N2K) data, and wired and wireless network connections (including TCP and UDP). It also contains a built-in webserver, so you can run OpenSkipper on a laptop and use this to display data on an iPad or Android phone or tablet.
product NGT-1-USB NMEA-2000-to-USB
Where can I buy？
You do not need to buy NGT-1. You can use arduino and some of my exmples. For listen only ActisenseListener does the same thing. Just for listening bus traffic load Actisense NMEA Reader for use with Arduino and ActisenseListener.
I also prefer to go Teensy family instead of Arduino Due. Teensy 3.2 for simple things. Teensy 3.5 can do very complex. ESP32, if you want to have WiFi.
teensy3.2 not support can-bus，ESP32 Development environment is a bit tedious， arduino due is easy to use， (*￣︶￣)
thank you so much
craig
You are wrong. Teensy 3.2 does support CAN-bus. There is sample drawing for that. Just need to add e.g. MCP2562 tranceiver as with Due, Teensy draws less current and and is more powerfull.
@craigtao If you want to see an exemple of a teensy 3.2 with CAN Bus, look at my project KBox: https://github.com/sarfata/kbox-hardware
You can buy pre-built units from my tindie page: https://www.tindie.com/products/sarfata/kbox-open-source-boat-gateway/
ps: I hope Timo will forgive me for this shameless plug ;)
@sarfata thank you
KBox is too expensive
i can use NMEA2000 lib develop one like KBox,
hardware ： arduino due or teensy 3.2 + MCP2562
You are wrong. Teensy 3.2 does support CAN-bus. There is sample drawing for that. Just need to add e.g. MCP2562 tranceiver as with Due, Teensy draws less current and and is more powerfull.
@ttlappalainen ok，i will try,
thanks again，
@ttlappalainen Hi,
i want use arduino mega , can run NMEA2000 lib ?
Due version is a bit expensive。teensy expensive too (*￣︶￣)
thank you,
Yes you can, but its memory is very limiter and you can not do very complicate systems with Mega. I prefer Teensy.
@ttlappalainen teensy 3.2 is enough？ or 3.6 ？ Teensy's IO pins are few，
Is its memory bigger than Mega?
i want to buy this http://skpang.co.uk/catalog/teensy-canbus-breakout-board-include-teensy-32-p-1507.html
But I don't know how to operate
i‘m in China’
KBox is based on Teensy 3.2, so you can do rather big project for it. It has also extra IO on pads under board. 3.6 has more memory and SD card reader build in.
That breakoutboard should work fine, since it simply has DC-DC converter and MCP2562, which I have used with all different systems.
which I have used with all different systems is breakout board or teensy3.2 ？
MCP2562 tranceiver chip. It can be used on Teensy, DUE, ESP32, RPi etc. I have also used Teensy 3.2 for many systems.
I will not build peripheral circuits, I just program, and read sch file so, I think Due is easy to me
How about stm32f10x? Can I run this NMEA2000 library? My concern is that MDK does not support the features of C++.
There are NMEA2000 driver classes for Teensy, Due, MCP_CAN, Socket_CAN, AVR, MBED, ESP32. If you want to use stm32f10x, you have to write driver class by yourself or send me one board, so I can write the driver.
I still wonder why to make things complex? Teensy is very powerfull and I just measured that my Teensy 3.2 board connected to NMEA2000 bus takes 14 mA power 24 mHz or 24 mA 94 MHz, while Due board on similar work takes 121 mA power. My Teensy solution reads several 1-wire sensors and sends data to the bus and works fine with 24 MHz. I also have system with Teensy 3.5 with 7" touch display taking only 150 mA display on and 90 mA display off. All those has been measured on 12.5 V.
Do you have some special system or why you should use something different than what is currently supported and tested? And if you do not need WiFi, I think that Teensy is the best option.
esp32‘s drive ’NMEA2000_esp32 https://github.com/ttlappalainen/NMEA2000_esp32
need freertos？
Buy ESP32 cheaper than teensy in China.
I choice ESP32.
Yes it is possible. Also example is for Arduino IDE. I prefer for any complex projects e.g. Platform IO.