Shop OBEX P1 Docs P2 Docs Learn Events
NMEA GPS module — Parallax Forums

NMEA GPS module

Mike CookMike Cook Posts: 829
edited 2006-01-03 23:09 in General Discussion

If anyone needs a GPS engine for their project I have a quite a few available.

See the following Link:

www.allsurplus.net/Axiom/

Questions will be answered if you use the "Contact Information" in the link.

Thanks

Mike

Post Edited (Mike Cook) : 5/21/2005 6:32:23 PM GMT

Comments

  • JavalinJavalin Posts: 892
    edited 2005-05-27 10:35
    Hi Mike,

    Forgive me if I've missed it, but does it come with/does it need an arial/antenna of some sort?

    Any idea on pricing? Are you in da USA?

    Cheers

    James
  • Tom WalkerTom Walker Posts: 509
    edited 2005-05-27 14:13
    FWIW, I ordered one and it arrived VERY quickly. Still on the prowl for an antenna....

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Truly Understand the Fundamentals and the Path will be so much easier...
  • SPENCESPENCE Posts: 204
    edited 2005-05-27 14:24
    Mike cook

    on your ebay listing with four items. If you select all items the
    "compare items" does not work. Repeatedly.......

    73
    spence
    k4kep
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-05-27 14:27
    www.sparkfun.com search: gps

    They sell 6 versions of SMA antennas, most are tri-band (GPS + 2 Cellular bands) but the cheapest is $13 with the cheapest active antenna being $20.

    PS search "tri-band" to pull up thier tri-band antennas.


    Post Edited (Paul Baker) : 5/27/2005 2:30:28 PM GMT
  • Mike CookMike Cook Posts: 829
    edited 2005-05-27 14:34
    SPENCE: Not sure why that does not work, but that's a·question for ebay. Sorry·I have no control over ebay's web site.

    To keep "off topic" traffic down on the list, please use the "Contact Information" provided in the link or feel to PM me here. I would prefer you to use the "Contact Information" provided in the link, since this will get to me quicker and get you the information you need ASAP. I will answer all questions related specifically to this item off list.

    However if the question is related to this item's operation with the Basic Stamp, then please post here. I'll reply·publicly here so the information can be shared.

    Thanks,

    Mike

    Post Edited (Mike Cook) : 5/28/2005 1:10:59 AM GMT
  • Mike CookMike Cook Posts: 829
    edited 2005-05-31 18:49
    Several people have emailed me and are having problems making the Nuts'N'Volts article #83 work with this receiver. After re-reading this article there are some differences between the two receivers.

    I have made some minor modification to Jon's SIMPLE_GPS.BSP that is attached.

    1. The Axiom receiver adds '.999' to the time field for 1000ths of seconds, which shifts the data down to different fields.

    2. SIMPLE_GPS.BSP uses a Garmin custom sentence $PGRMZ which is not supported by the Axiom, if altitude is desired then the $GPGGA sentence contains the altitude field, I will try to find the time to add this to the program.

    Attached is a screen shot of the receivers output of the debug window and a modified version of Jon's SIMPLE_GPS.BSP renamed to AXIOM_SIMPLE_GPS.BSP

    Mike

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "OEM NMEA GPS Module" Now available on ebay for only $19.99

    Product web site: http://www.allsurplus.net/Axiom/

    Post Edited (Mike Cook) : 5/31/2005 6:55:24 PM GMT
    BSP
    BSP
    AXIOM_SIMPLE GPS.BSP
    17K
    Axiom_GPS.GIF
    589 x 480 - 20K
  • DaveFDaveF Posts: 62
    edited 2005-07-14 19:21
    What nuts n volts issue is this article in?

    Thanks!

    Dave
  • Brian CarpenterBrian Carpenter Posts: 728
    edited 2005-09-10 06:04
    can this connect directly to the power on the BOE board? i cant seam to make it work.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔


    It's Only A Stupid Question If You Have Not Googled It First!!
  • Mike CookMike Cook Posts: 829
    edited 2005-09-10 12:20

    I use a separate power supply, because I'm using my test fixture for the GPS module. The receiver and active GPS antenna can pull up to 180ma, so make sure that your BOE can supply that much current. If your running off of batteries that might be the problem.

    Here's a shot of my setup, It's been running the code posted above for months.

    www.allsurplus.net/Axiom/apps/GPS_BS2P24.jpg (warning this photo is about 1mb in size)

    1. Using a separate power supply to power the receiver

    2. Not using a BOE board but a Super Carrier Board, should be very similar

    3. Stamp is a BS2P24

    I have a GPS signal repeater, that's why I can have a GPS lock inside my shop, with the GPS antenna sitting on the shop bench, normally the GPS antenna should be placed outside so it can "see" the sky.

    Mike

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "OEM NMEA GPS Module" Now available on ebay for only $19.99

    Product web site: http://www.allsurplus.net/Axiom/

  • Mike CookMike Cook Posts: 829
    edited 2005-09-10 12:29
    Dave,

    Sorry for the late reply,

    Column #83: Where in the World is my BASIC Stamp?

    http://www.parallax.com/dl/docs/cols/nv/vol3/col/nv83.pdf

    Mike



    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "OEM NMEA GPS Module" Now available on ebay for only $19.99

    Product web site: http://www.allsurplus.net/Axiom/

  • DaveFDaveF Posts: 62
    edited 2005-09-10 17:40
    Better late than NEVER!

    Thanks for the reply!

    Dave
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2005-09-11 14:02
    Jon Williams posted links to a bunch of articles, &c. on GPS'ing over at the the Basic Stamp forum, "Cheap and Easy GPS" subject.
  • lfreezelfreeze Posts: 174
    edited 2006-01-02 18:07
    I am planning on buying GPS modules from allsurplus. Can anyone share some basic stamp [url=mailto:BS2@connectionsIi]BS2 connections information that is specific to the Axiom sandpiper module.[/url]·I have been reading most ot the many articles about connecting and
    It looks pretty straightforward. I am a little puzzled about how to connect the BS2 to the module (GPS Axiom sandpiper) in DGPS mode, is it as simple as moving that stamp input to port B of· the Axion GPS module?·
    Thanks..............
  • Mike CookMike Cook Posts: 829
    edited 2006-01-02 20:16
    On the Sandpiper, Port B is the DGPS input port, this in an input from a user supplied DGPS receiver.

    Take a look at the links above for the Nuts & Volts article and program code.

    While it is possible to use these with a BS2, all depends on your programming skills and techniques. They would probably be easier to work with on the BS24p or other models of stamps that have 'scratch pad memory'. Remember your dealing with variable length strings when interpreting the NMEA data.

    Search the forums, or look in the files section of the old YAHOO group, there is an example program on how to extract time, from the receiver, using the BS2.

    Mike

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "OEM NMEA GPS Module" Now available on ebay for only $17.49

    Product web site: http://www.allsurplus.net/Axiom/
  • ForrestForrest Posts: 1,341
    edited 2006-01-02 20:23
    Jon Williams posted some GPS programs that work with a BS2 here - search for GPS groups.yahoo.com/group/basicstamps/files/
  • lfreezelfreeze Posts: 174
    edited 2006-01-02 23:26
    Thanks Mike, I'll read Jon's articles on GPS and the stamp. I am still confused about DGPS. Based on what I have read so far, DGPS receivers are accurate within 1 to 15 feet while GPS receivers are accurate to about 50 feet. What purpose is the reference to a DGPS· port (serial receive data. differential GPS messages) on the Axiom sandpiper module? I will visit there web site to see if I can find an answer but a quick look did not turn up anything.
  • Mike CookMike Cook Posts: 829
    edited 2006-01-02 23:32
    By connecting the output of a DGPS receiver to the Sandpiper module, the receivers accuracy will increase to 1 to 5 meters.

    For more info in DGPS take a look at Trimble's site:

    http://www.trimble.com/gps/dgps.html

    Mike


    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "OEM NMEA GPS Module" Now available on ebay for only $17.49

    Product web site: http://www.allsurplus.net/Axiom/

    Post Edited (Mike Cook) : 1/2/2006 11:51:38 PM GMT
  • Mike CookMike Cook Posts: 829
    edited 2006-01-03 21:59
    FYI:

    Found some Active GPS Antennas in the surplus market:

    http://www.halted.com/commerce/catalog/product.jsp?product_id=20182&czuid=1136325569296

    Looks like it has an 'odd ball' RF connector, but at this price it seems like a deal to me!

    Mike


    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "OEM NMEA GPS Module" Now available on ebay for only $17.49

    Product web site: http://www.allsurplus.net/Axiom/
  • lfreezelfreeze Posts: 174
    edited 2006-01-03 22:47
    Thanks Mike I'll take a look. The Trimble site you suggested answered my questions about DGPS.

    I still find it amazing that module costs for DGPS are so high. they are completly out of my price range. I will stick with

    GPS modules and the accuracy they provide.
  • Mike CookMike Cook Posts: 829
    edited 2006-01-03 23:09
    Yes DGPS receivers are pricey but there is also this alternative:

    http://www.wsrcc.com/wolfgang/gps/dgps-ip.html

    My company's use of GPS technology is limited to the AVL industry, so we normally know what the item is we are looking for. The GPS information narrows down the location of the item we are looking for, so it can be recovered in a timely manor.

    Mike

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "OEM NMEA GPS Module" Now available on ebay for only $17.49

    Product web site: http://www.allsurplus.net/Axiom/

    Post Edited (Mike Cook) : 1/3/2006 11:17:37 PM GMT
Sign In or Register to comment.