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converter box for nmea 2000

Old 02-04-2015, 01:15 AM
  #21  
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On the typical HEFI wiring harness, there is a two wire connector for "CAN network links" to displays or other devices. Below is a pic of an extension cable. Which plug is on the engine harness, male or female?



I heard back on my question regarding multiple ECUs on the same CAN network. Should work, according to the standard network design. However...
Thinking this over in my head, even though there is no reason 2 HEFI units couldn't share a single physical CAN-bus and N2k gateway, most twin engine boats run dual 12v systems. CAN networks are low voltage, and N2k gateways should be "optically isolated" from other power sources by design. So I don't particularly like having a "bridge" between both ECU's on separated 12v power systems unless they share a common ground.. The bus becomes a possible path for a power spike to wipe out both ECU's. Even though one of our two 12v systems is ultimately powering the plotter and N2k network.

So am thinking we should use 2 NEMA gateways, one per engine. Sound correct? I believe that is the proper routing design shown under some N2k documentation I've read. Anything I am missing here?

Hope to get started on a "pair" of prototypes within two week for ya delsol
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Old 02-06-2015, 06:23 PM
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Awesome! It's a female connector on the harness side
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Old 03-03-2015, 02:13 PM
  #23  
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Haxby, do you have any customers or contacts in the Detroit Mi area with a running HEFI setup I can possibly work with one day soon. I have the piece of hardware I believe will fit the bill to convert the CAN packets from Holley EFI to either OBD-II or N2k PGN formats we need. However the the developer lives just north of Detroit, about 5hrs away from me. MCU programing is not my gig. So If I can find a running engine closer to him, he'd probably meet with me to whip out the hard stuff in a single day. Saving a bunch of time..

PS your pm box is full.

-K
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Old 04-30-2015, 04:15 PM
  #24  
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Default HEFI Gateway Updates

Prototype PCB's are done and ready to start software testing.
Some notable board components:
  • Power input range DC: approx. 8-28v
  • 2 galvanic isolated CAN bus transceivers - As per NMEA hardware standards
  • Bluetooth LE modem (switchable) - IOS and Android compatible for soft gauges or diagnostics
  • User flash-able USB port - firmware updates
  • Switchable network termination resistors
  • Switchable Port/Starboard engine outputs (DIP switch)



The PCB case is IP67 waterproof rated, contains standard N2k network drop cable on one side, HEFI CAN plug and extra power leads on the other. This unit can be powered off the network or directly wired into the engine harness.


Hope to complete testing with Delsol within the next two weeks. Once operation is confirmed, we'll take orders for the production run. Nice thing about this design is the firmware can be updated to work with other CANbus ECU's like MEFI units or standard automotive ECU's. The output format can also be setup to do J1939 or other protocols. On the Bluetooth side, we plan to go with Torque for the soft gauges since it works well with IOS and Android devices.

Last edited by kidturbo; 04-30-2015 at 04:42 PM.
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Old 04-30-2015, 04:51 PM
  #25  
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Fantastic Ken.

Looking forward to this.
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Old 05-29-2015, 05:36 AM
  #26  
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Hardware and software is done.. Try picking something tougher next time...

Tested yesterday with "simulated" Holley EFI data running through twin engine gateways into an actual NMEA 2000 equipped Simrad plotter. Along with your basic engine data, we also displayed throttle position, fuel flow meters, plus drive trim and tab position utilizing the spare HEFI auxiliary inputs. Probably room left for a couple more inputs if needed. Now onto wiring up something that floats, delsol :-)

Oh yeah >> Paging HaxbySpeed!! >> Get in touch please.





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Old 06-17-2015, 09:28 PM
  #27  
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Noland units work great and have awesome customer support.
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Old 06-19-2015, 12:15 AM
  #28  
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Dirty money-- the noland units I'm sure work very well for converting analog senders over to NMEA 2000, I am utilizing the Holley ECU that is already monitoring all of the critical engine functions and trying to get it to communicate with a chartplotter...

Kid Turbo -- Ken -- has spearheaded this project and come up with a fantastic gateway to make this all possible. He knows his stuff! We will be doing final testing on the system next week...can't say thanks enough.

Anyone running a Holley EFI system should look into this
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Old 06-19-2015, 12:19 PM
  #29  
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Originally Posted by DirtyMoney View Post
Noland units work great and have awesome customer support.
Yes I've also heard nothing but good things about both Noland and Actisense units. No matter what engine setup you have, those will get the critical engine data into a digital display. But for guys like Delsol with custom high HP EFI builds, that would require double sensors and wiring on each engine.

Since about every OEM and aftermarket ECU on the market today offers "CAN" options, this gateway only requires two wires per engine. The problem has been the multitude of languages these ECU's speak. No one wants to develop a gateway that only work for a single model ECU, ain't worth the time. Industrial engines and Gensets all share a common SAE protocol / language, J1939. The whole NMEA2k standard was actually built around that protocol. Then you have Merc, who felt it was best to go it alone. Opening up a market to convert their stuff also.

So who's left out of the party? Aftermarket systems like Holley, FAST, MSD, and all the automotive OBD-II compliant units. Everything popular with the hobbyist or professional engine builders like Haxby, Chief, Sterling and others. I ran into similar issues with my Duramax conversions, as have guys dropping the new GM LS versions or V10 Viper engines into a boat. All great engine platforms, never specifically intended to be marinised.

Our little gateway project was designed to make such communication road blocks a plug-N-play install to modern plotters and marine gauges. It's no cheap knock off project box. Custom PCB with top shelf electronics and network isolation features as called for in N2k standards. Just easily firmware flashable, bringing plenty of other interesting uses to mind. First we'll see how these Holley prototypes work out. Thanks to guys like Delsol and Haxby for backing the development.

-K
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Old 09-14-2015, 11:29 AM
  #30  
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Originally Posted by kidturbo View Post
Prototype PCB's are done and ready to start software testing.
Some notable board components:
  • Power input range DC: approx. 8-28v
  • 2 galvanic isolated CAN bus transceivers - As per NMEA hardware standards
  • Bluetooth LE modem (switchable) - IOS and Android compatible for soft gauges or diagnostics
  • User flash-able USB port - firmware updates
  • Switchable network termination resistors
  • Switchable Port/Starboard engine outputs (DIP switch)



The PCB case is IP67 waterproof rated, contains standard N2k network drop cable on one side, HEFI CAN plug and extra power leads on the other. This unit can be powered off the network or directly wired into the engine harness.


Hope to complete testing with Delsol within the next two weeks. Once operation is confirmed, we'll take orders for the production run. Nice thing about this design is the firmware can be updated to work with other CANbus ECU's like MEFI units or standard automotive ECU's. The output format can also be setup to do J1939 or other protocols. On the Bluetooth side, we plan to go with Torque for the soft gauges since it works well with IOS and Android devices.

I came across this post while searching on google how to get data out of Holley's CANbus. Never thought it would pop up with a site I am already a member of.

Anyway, are you selling these boards and for how much? What ARM chip are you using? I have a couple ARM platforms here on my desk along with some Arduino AVR's. I'm not exactly needing the nmea output but more so for datalogging.
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