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  1. #121
    Join Date
    15th October 2016
    Location
    Huntsville AL
    Posts
    1,878
    Return of the tracking neophyte!

    So I've been using this thing and its legit (when I use a properly charged battery)

    But I can't seem to locate the saved paths on the android RocketLocater app. I click Save path after every launch, but I haven't been able to find them when diggin through my phone's files once I hook it to my computer.....

    I've got an XT1080 by motorola.
    Any ideas?
    Phone isn't compatible with GPSRL's storage?
    T3 doesn't send the data that rocket locator saves?

    "I'm at least 70% confident about whatever I say (90% of the time)"- college me

    NAR 101195
    Level 1: Big SAM, 9/10/16

  2. #122
    Join Date
    6th September 2009
    Posts
    1,648
    Quote Originally Posted by Nytrunner View Post
    Return of the tracking neophyte!

    So I've been using this thing and its legit (when I use a properly charged battery)

    But I can't seem to locate the saved paths on the android RocketLocater app. I click Save path after every launch, but I haven't been able to find them when diggin through my phone's files once I hook it to my computer.....

    I've got an XT1080 by motorola.
    Any ideas?
    Phone isn't compatible with GPSRL's storage?
    T3 doesn't send the data that rocket locator saves?
    On my phone, the file is called "rocket_path.txt" and it is written to the root directory of the internal storage.

    The maps disappeared also. Worked a month ago, but not now.


  3. #123
    Join Date
    26th November 2009
    Posts
    4,916
    Google killed the photo maptiles for this app. Did it once before and there was a workaround. The app had the ability in the pull down
    menu to download the tiles for off line use. If one took the time to download the tiles at various zoomlevels (takes a lot of space hence
    being able to "put" them on a 128Gb micro SD card is nice) they are in a directory called /mapcache/google. One can
    download the OSM maptiles if they are going to be using a device without internet access. If one just used the app live with internet access and didn't download the tiles specifically, then the photo map tiles are gone.

    The OSM or Open Source Maps are still available but it is nice to be able to "see" the tree line, the vegetation likely around the drainage ditch
    or the building that your rocket landed close to. But a plain map is still helpful.

    The OSM maptiles take less space but of course don't show as much detail as a recent aerial photomap.

    The Ham Radio tracking app APRSISCE/32 radio tracking app uses an arc GIS photo map set that apparently is unencumbered:
    http://aprsisce.wikidot.com/

    The photo maps are a few years old but still very workable for showing most features in open fields.

    Am using a modified version of APRSISCE/32 to track with EggFinders and it will work with a MW T3 as my ground test has shown.
    Haven't flown the T3 yet but looking forward to it.

    As an aside, if anyone gets a used Garmin for tracking purposes this site has OSM maps you can download and load up in compatible
    Gamin GPS units: http://garmin.openstreetmap.nl/

    The maps are quite good but don't expect the directory to be up to date as far as finding stores, gas stations, hotels, etc. The maps are
    fine for rocket tracking in a second hand Garmin GPS.

    Kurt

  4. #124
    Join Date
    15th October 2016
    Location
    Huntsville AL
    Posts
    1,878
    Quote Originally Posted by Buckeye View Post
    On my phone, the file is called "rocket_path.txt" and it is written to the root directory of the internal storage.

    The maps disappeared also. Worked a month ago, but not now.
    No love.

    Thanks for the tip though, an extension search saved me some digging.

    Update: I actually found them. Nothing was visible in the main folder, but I got into a streak of deleting old dowloads and photos and backing stuff up, then lo and behold there was a rocket_path file and a rocket folder.

    Now I just have to figure out how to import them to google earth pro.....
    Last edited by Nytrunner; 4th December 2017 at 02:48 AM.

  5. #125
    Join Date
    3rd July 2017
    Location
    Austin! TX
    Posts
    48
    This unit looks awesome and I'm super interested in the whole shebang: tracker, 3D printed sled and base box, everything!

    But, hey, dumb question amnesty please: Do the units come with the pigtails to connect the battery? If not, any recommendations? I'll be getting the Turnigy 750mAh recommended on the site. Thanks.

  6. #126
    Join Date
    15th October 2016
    Location
    Huntsville AL
    Posts
    1,878
    Quote Originally Posted by HandsomeRob View Post
    This unit looks awesome and I'm super interested in the whole shebang: tracker, 3D printed sled and base box, everything!

    But, hey, dumb question amnesty please: Do the units come with the pigtails to connect the battery? If not, any recommendations? I'll be getting the Turnigy 750mAh recommended on the site. Thanks.
    They don't come with pigtails, but I got a pack from Amazon pretty cheap for altimeter power anyway.

    If you grab a pack, you'll end up using the extras somewhere before you know it!

  7. #127
    Join Date
    3rd July 2017
    Location
    Austin! TX
    Posts
    48
    Dang, that was fast. Thanks!

  8. #128
    Join Date
    18th January 2009
    Location
    Toney, Alabama
    Posts
    3,491
    Quote Originally Posted by Nytrunner View Post
    They don't come with pigtails, but I got a pack from Amazon pretty cheap for altimeter power anyway.

    If you grab a pack, you'll end up using the extras somewhere before you know it!
    Do you have a link or part number for the pigtails?
    "He who fights with monsters should look to it that he himself does not become a monster, and if you look long into an abyss, the abyss also looks into you." - Friedrich Nietzsche

    TRA# 08705 L3

    www.dragonworksrocketry.com

    DragonWorks Rocketry YouTube Channel

  9. #129
    Join Date
    13th June 2014
    Location
    Cocoa Beach, FL
    Posts
    3,556

  10. #130
    Join Date
    20th June 2015
    Location
    Vermont
    Posts
    397
    Quote Originally Posted by DRAGON64 View Post
    Do you have a link or part number for the pigtails?
    Or these from one of our regular vendors:

    http://rail-buttons.com/misc.html

    A little more money but not shipping from China.
    Jim V

    Champlain Region Model Rocket Club
    CRMRC
    Facebook
    NAR #101467
    L1 - 5/21/16 Estes Mega Der Red Max H128W to 1,021'


  11. #131
    Join Date
    18th January 2009
    Location
    Toney, Alabama
    Posts
    3,491
    Quote Originally Posted by timbucktoo View Post
    Quote Originally Posted by smugglervt View Post
    Or these from one of our regular vendors:

    http://rail-buttons.com/misc.html

    A little more money but not shipping from China.
    Thanks guys, I now have plenty on order.
    "He who fights with monsters should look to it that he himself does not become a monster, and if you look long into an abyss, the abyss also looks into you." - Friedrich Nietzsche

    TRA# 08705 L3

    www.dragonworksrocketry.com

    DragonWorks Rocketry YouTube Channel

  12. #132
    Join Date
    26th November 2009
    Posts
    4,916

    My take on a T3 receiver installation

    Hey, I had some parts ly'in around and cobbled together the T3 receiver. I had some 1/2" standoffs I ordered by mistake one time, a project box that needed a project, a locking SPST switch and a big flat 3000mah Tenergy 3.7V lipo that was just sitting around.
    I experimented with cellphone jammers for awhile as I absolutely hate being interrupted by inconsiderate people's stupid a%% cellphones. The low powered ones weren't worth diddly squat and the higher powered ones wiped out most of my side of the building so I couldn't do that without arousing suspicion or trouble. I acquiesced I have to put up with the stupidhead inconsiderates of the the world so stood down from jamming.

    Anywho that's why I had the flat Tenergy pack.
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    I used the 1/2" hexagonal standoff for the distal end by the battery terminal. You can see the 2/56 retaining nut there. I was able to drill the hole for the RP-SMA connector nearly
    "just right" and had to use two nylon washers on the the standoff to level things out.
    I didn't bother with standoffs at the two holes next to the RP-SMA antenna connector as the
    nut on the connect will adequately hold the board to that case along with the distal
    standoff.

    That switch is a locking switch. I have to "pull" to throw it and it locks in place. Hard to shut off. In fact it's so hard to shut off, I use them on the bulkhead to turn on a M.A.D. unit for
    apogee only deployment of a chute. Cripes, once the charge fires, I don't care what happens to the switch then. I've never had a MAD unit fail yet with this switch nor has it been knocked
    to the off position by deployment charges.

    The flat Tenergy 3.7V 3000mah pack is simply double stick servo taped to the side of the box.
    That extra JST connector one sees there is to plug the lipo into the charger for recharging.
    + is taken off at the + terminal of the T3 receiver as I plugged two wires there one from the battery and one from the JST. The - is taken off at the switch. When the switch is off, I can charge to the JST without issue. The juice goes to the battery only with the switch off.

    Yeah it can be crammed into a smaller box with a smaller battery but I had the stuff ly'in around so decided to put it to use. My gosh, I remember I got these funky long 2/56 hexagonal standoffs just sitt'in there so decided to put one to good use! Kurt

  13. #133
    Join Date
    19th January 2009
    Location
    Stafford VA
    Posts
    7,045
    I did something similar to Kurt

    I had some 3mm plywood, a box, and a mini DPST switch and built a sled for the transmitter and a box for the receiver.

    I used a DPDT switch I had to switch the battery to the board or the charging connector. I had thick wall tubing that I used to install a sled with the transmitter. The tube gets taped to the shock cord with several wraps of electrical tape. I had done this with just the transmitter and battery in bubble wrap and it worked very well, but I decided to build a sled for it. I use 2-56 nylon screws to attach the transmitter to the board which is build from pieces of 3mm ply glued in the right places. There are several pieces to make the stand offs and threaded holes to attach the board to and more pieces glued in place to hold and contain the 3.7V LiPo. I sanded down the sides so there was enough clearance to be able to wrap the battery and antenna to the board with electrical tape and still fit the sled in the tube. It all slides into the tube and the end caps are taped in place.

    Click image for larger version. 

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    Handeman

    TRA #09903 L3 3/29/2015

    "If you don't use your head, you have to use your feet!" my Dad

    Tripoli Central Virginia #25 - BattlePark.org

  14. #134
    Join Date
    26th November 2009
    Posts
    4,916
    Nice. I was like what the hay. I found that funky flat lipo out in the garage where it got tossed after the sewer line backup last April. That's when it hit me I had these project boxes and weird standoffs (the standoffs I got by accident!). I think now I'll try to
    screw a horizontal clip on the back of the box so I can clip the T3 receiver to a backpack strap. I slap a Yagi on my receivers once the rocket is down so with the EggFinder LCD's I have one of the Black Arrow cases I wear with a neckstrap so I can hold my Nexus 7 one handed in a flat black painted box and hold the Yagi in the other hand. My opinion, best way to track these days. Make the two icons come together and BAM! You found the rocket.

    I was thinking the T3 might have a little edge over the Eggfinders over range but don't know that for a fact. 250mW vs. 100mW but I think the encoding on the T3 is spread spectrum? So it might be a wash between the two.

    For sport flying, either one will do fine especially for a flatlander like me. Out west where the project might land 5 miles or more away out on the playa, I'd like more power and/or a move to 70cm or 2 meter Ham bands for insurance.

    The key for that environment is get a trendline and try to get the last known position as low and as close to touchdown as possible. Once on the ground, the playa sucks up Rf like a sponge due to dissolved salts and the ground footprint of a transmitter
    is very small. I've never flown there but that's what I'm told and would be the way I'd handle it. Of course if there is nothing but wide open spaces it's relatively easy to see a downed rocket. If the rocket goes somewhere where there's scrub vegetation
    could be challenging to try and find. Kurt

  15. #135
    Join Date
    19th January 2009
    Location
    Stafford VA
    Posts
    7,045
    What is nice about Rocket Locator and the T3, the last know position of the rocket stays on the screen and you can go to it. The receiver will update if it gets new packets. But, even weeks later you can call up the last known position of the rocket in Rocket Locator.

    Handeman

    TRA #09903 L3 3/29/2015

    "If you don't use your head, you have to use your feet!" my Dad

    Tripoli Central Virginia #25 - BattlePark.org

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