On 3/3/2013 11:47 AM, Mike Harrison wrote:
> On Sun, 03 Mar 2013 11:16:40 -0300, you wrote:
>
>> Dear All,
>>
>>
>> I need to read data from a John Deere GPS. The GPS doesn't use the
>> traditional RS-232 interface with NMEA protocol, but instead it uses a
>> CAN bus at 250kbps and sends GPS data in NMEA2000 format inside CAN pack=
ets.
> GPS receivers are cheap - might it be easier to just add a second GPS for=
 your use?
>
     Yes, indeed. You can buy "used" GPS modules on Ebay for as little=20
as $19.94 USD (ebay# 330817769260).
I have purchased 4 different ones, and they all presented NMEA data=20
perfectly. Course, I only use TIME/DATE, nothing
else, so as little as just one operating bird is fine for my needs.

      These modules on Ebay were removed from earlier, less smart=20
products, but they have built-in antennas and most
have internal rechargeable batteries. Most handle a maximum of 12 birds=20
only. Costs a fraction of newer modules. Most
send TTL-level RS232 serial output in 7-bit odd parity 4800 baud only. I=20
stick the module, antenna up, into a small waterproof
box, then supply 5V in, and Serial TTL out. The data is normally=20
inverted from rs232 serial, as it is designed to drive a MAX232
rs232 line.



--Bob A





--=20

The only place success comes before work is in the dictionary.

VINCE LOMBARDI

--=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
.