Hi Rodolfo, Yes, I followed the links. They had interesting and useful information including source code, but the most useful info were some XML files describing the structure of the packets. Unfortunately I couldn't relate that information with the data inside the CAN packets I captured. I think they are in a proprietary binary format= .. Best regards, Isaac Em 6/3/2013 19:15, Nily escreveu: > hello > > Isaac > > did you see the links I sent you ? (Arduino NMEA2000 CANbus). > > Cheers > > Rodolfo > ----- Original Message -----=20 > From: "Isaac Marino Bavaresco" > To: "Microcontroller discussion list - Public." > Sent: Wednesday, March 06, 2013 1:04 PM > Subject: Re: [EE] GPS, CAN & NMEA2000 > > >> Hi Richard! >> >> >> I really don't know if the data is NMEA. Indeed I'm suspecting that the >> data may be in a proprietary binary format. >> >> The receiver is John Deere StarFire 3000. I suppose that John Deere >> doesn't make GPS, so the manufacturer may be any. >> >> I captured lots of CAN packets and already deciphered some of them, but >> there are five or six proprietary PGNs. At least three of them may carry >> high-precision GPS information. >> >> I would appreciate any info that helps me to decipher the data. >> >> >> Best regards, >> >> Isaac >> >> >> Em 06/03/2013 17:38, Richard Prosser escreveu: >>> Hi Isac, >>> >>> Are you sure that the format is Nemea? Many manufacturers put out Neme= a=20 >>> as >>> an option but have an in-house binary format for their specialist >>> application. I work for Trimble and we have TSIP for binary, high >>> precision output and Nemea is available (sometimes as an addional=20 >>> purchase) >>> for external use. The TSIP output is required for cm accuracy. There is >>> information available on some of the binary formats used - others are=20 >>> more >>> restricted. Who is the manufacturer of the GPS gear? >>> >>> Richard >>> >>> >>> >>> On 4 March 2013 08:58, Nily wrote: >>> >>>> or this one: >>>> http://www.can-cia.org/index.php?id=3D496 >>>> >>>> ----- Original Message ----- >>>> From: "Isaac Marino Bavaresco" >>>> To: "Microcontroller discussion list - Public." >>>> Sent: Sunday, March 03, 2013 9:34 AM >>>> Subject: RE: [EE] GPS, CAN & NMEA2000 >>>> >>>> >>>>> Em 3/3/2013 13:59, alan.b.pearce@stfc.ac.uk escreveu: >>>>>>> Maybe this will help you >>>>>>> http://www.adfweb.com/home/products/CAN_BUS_analyzers.asp >>>>>>> >>>>>>>> Does someone know anything about NMEA 2000, and more specifically >>>>>>>> NMEA 2000 over CAN BUS? >>>>>> Although that analyser talks about NMEA2000, it isn't clear to me th= at >>>> it >>>>>> actually decodes the messages into human readable format, it may onl= y >>>>>> handle the burst mode decode noted in the Wikipedia article I posted= .. >>>>> I have already logged a lot of data from the bus with my Saleae Logic= =20 >>>>> and >>>>> an ATSAM3X-EK. I can see patterns in the data and probably may even >>>>> understand it with time, but I need something more trustable and fast= .. >>>>> >>>>> >>>>>> It strikes me that Isaac will have to buy the NMEA standard, and I=20 >>>>>> would >>>>>> have thought the cost of such standards would be billable against th= e >>>>>> customer anyway. >>>>> Yes, I already bought one of the documents from the standard, but it >>>>> doesn't help and not even gives a hint where to find the important >>>>> parts. Buying the entire set of documents is out of question, it woul= d >>>>> cost several thousand dollars and would include too much information = I >>>>> don't need. >>>>> >>>>> My client probably will desist of the project if he must buy the enti= re >>>>> set of documents. >>>>> >>>>> I would be glad to buy one or two more documents of the standard, onl= y=20 >>>>> I >>>>> would like to know what parts document the structure of the packets, >>>>> data types and what packets represent what information. >>>>> >>>>> >>>>> Best regards, >>>>> >>>>> Isaac >>>>> >>>>> -- >>>>> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >>>>> View/change your membership options at >>>>> http://mailman.mit.edu/mailman/listinfo/piclist >>>>> >>>> -- >>>> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >>>> View/change your membership options at >>>> http://mailman.mit.edu/mailman/listinfo/piclist >>>> >> --=20 >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .