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  1. #1
    Join Date
    23rd January 2009
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    New York
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    5,253

    Eggfinder with Bluetooth - Anyone using with Windows Tablet?

    I finally threw my hat in the ring and purchased an Eggfinder through Cris's sale. I'm excited to have a small GPS transmitter to tuck into rockets that I don't necessarily want to work my AIM Xtra into!

    I purchased the starter kit that comes with the simple dongle type receiver with Bluetooth module. I understand this works pretty seamlessly with Android, but what about a Windows tablet and the suggested MapSphere software? I'd like to use the same tablet for the Eggfinder that I use for my AIM. Using the Bluetooth connection is preferred as that leaves the single shared charging/device hook up on my tablet free for an external battery if needed.

    Any experience out there?

    Dan Patell
    TRA 10904 L3

    Simplify your Raven's Wiring with Simple Circuit!!!

    Easy Research Rocketry
    29mm Research Hardware, 3d Printed Accessories, and Rocket Kits!

  2. #2
    Join Date
    3rd February 2012
    Location
    So Cal (ROC, TRASD, SCRA)
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    2,508
    I tested it early on but with a Windows laptop instead of a tablet. Windows is a little finicky about serial Bluetooth connections, but it will work.


  3. #3
    Join Date
    12th September 2013
    Location
    SE Wisconsin
    Posts
    963
    I've tested a Bluetooth adapter on the LCD connection header, connecting to my Surface Pro running Mapsphere. Worked at home - I haven't tried it in the field.

    What I noted was that the COM number incremented each time I set it up. I can't recall at the moment if I was re-pairing each test session or not; so it might have been the pairing that incremented the COM. It did seem to stabilize at COM 8 or so.
    Charles McGonegal
    Ciderwright at AeppelTreow Winery & Distillery
    www.appletrue.com
    NAR #103560 L1 6/25/17 Estes Leviathan CTI H175-SS
    Ad Astra Tabernamque!

  4. #4
    Join Date
    23rd January 2009
    Location
    New York
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    5,253
    Quote Originally Posted by cerving View Post
    I tested it early on but with a Windows laptop instead of a tablet. Windows is a little finicky about serial Bluetooth connections, but it will work.
    Appreciate the input! I'll give it a shot and I'll report back when I get the thing together and working. I will also be developing some solutions for the Tx and Rx using my 3D printer. Should be a fun adventure!
    Dan Patell
    TRA 10904 L3

    Simplify your Raven's Wiring with Simple Circuit!!!

    Easy Research Rocketry
    29mm Research Hardware, 3d Printed Accessories, and Rocket Kits!

  5. #5
    Join Date
    26th November 2009
    Posts
    4,592
    WinDoze with Bluetooth stinks period. A promising java app that fizzled was YAAC: http://www.ka2ddo.org/ka2ddo/YAAC.html I came very, very close to being workable with an off line map except B/T implementation stinks.

    The program does allow one to designate a local NMEA stream for local position and you can take a second NMEA stream "EggFinders" or what have you and set that up as a "remote" station to monitor instead of or in addition to APRS stations.

    I got B/T working fine on a Linux laptop but Linux handles B/T in a more "safe and sane" fashion.

    I can't get B/T to consistently work with YAAC for two NMEA devices. Stinks. I would have been able to come up with a one page instruction sheet that ANYONE could have used to use a live map tracking and navigating app.
    Even though this was Ham software, would have been perfectly legal for non-Hams to use in the ISM band. Close but no cigar. The screens below show some old local testing.

    The only mapping apps one can use on Windows for EggFinder, 3DR and Missileworks or any NMEA stream based tracker is Mapsphere. It is an unsupported app that can sometimes have connectivity issues.
    It will only tell you where your rocket has been on a map and cannot be used directly for navigation. You have to "dig into" it to get to the last known position out of an internalized table and do the recovery by other means.

    APRSISCE/32 can be made to work but it's even worse to setup than YAAC. Once setup it's pretty rock steady but I think it misses in flight positions because I've been running a second instance to keep track of my local position
    concurrently. I think there are position collisions that cause me to miss legitimate inflight positions.

    I haven't had a chance to run one instance to track the rocket in flight by itself and then open the second instance to track my position to go out and effect the recovery. I think this might lead to better live plotting of positions.

    Again, this is too darned hard for a non-ham, non-aprs savvy person to setup.

    Xastir is cool but again it's in Linux so a non-linux, non-ham and non-aprs person would be even more clueless. Live map and navigating is not there yet for NMEA trackers.

    For Beeline GPS on the Ham Bands it's been doable for 10 years with APRS handi talkies and some Garmin GPS units. Kurt
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    Last edited by ksaves2; 13th November 2017 at 09:00 PM.

  6. #6
    Join Date
    3rd February 2012
    Location
    So Cal (ROC, TRASD, SCRA)
    Posts
    2,508
    Quote Originally Posted by Charles_McG View Post
    I've tested a Bluetooth adapter on the LCD connection header, connecting to my Surface Pro running Mapsphere. Worked at home - I haven't tried it in the field.

    What I noted was that the COM number incremented each time I set it up. I can't recall at the moment if I was re-pairing each test session or not; so it might have been the pairing that incremented the COM. It did seem to stabilize at COM 8 or so.
    You have to go into Device Manager and override the assigned COM port, once you do that it will keep it as long as it's the same Bluetooth device (they have their own unique addresses even if the name and pairing code is the same).


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