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OpenPilot store open

Posted by Gary Mortimer on May 6, 2010 at 7:48am

400px-GPS-Wiki-Infin-1.jpg


I see that the chaps down under, where woman blow and men chunder, have opened their store.


The first product I see of interest is the GPS which can be used with Ardupilot


The OpenPilot GPS is an ideal upgrade to the U-Blox unit normally used with the ArduPilot. To specifically make this upgrade easier for the community, the ends of the wire that is supplied with the OpenPilot GPS has been pre-crimped with JST SH pins. This means that you can free the pins from the housing of your old unit and just plug these crimped wire ends straight in to your old connector.


http://wiki.openpilot.org/OpenPilot_GPS


Heres the store link


http://store.openpilot.org/openpilot-gps.html


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Comments

  • Developer
    Sandro Benigno June 5, 2010 at 5:59am
    @Gary - I read on the wiki: "5 volt device with an on board regulator. The serial port uses 3.3V levels. "

    So, I ask you: Is the serial input 5V tolerant? What I'm trying to say is... Does we need to put a level converter to reduce the signal input voltage? i.e. between the GPS and an ArduinoPro 5V TX and RX pins.
  • tshado May 21, 2010 at 2:19am
    Hello

    @Gary
    I was thinking it could be interesting for other members here to know about the OpenPilot GPS use for their AP.

    @Morli
    Thanks for your reply
    You are also a good buyer ;-)
    I understand better the meaning of "pre-crimped"
    I will carefully read your feedback on use of this GPS with the UDB.

    Best regards,Jean-Claude
  • Admin
    Morli May 20, 2010 at 4:24am
    Jean,
    "What do you mean by "our pre-crimped wires simply push in to this connector".
    The cable that is supplied with this GPS has connector pre-crimped atleast on one side which matches the Open Pilot GPS. I assume the other end is either not terminated or needs to be customized for connector as required for UDB. I will be also doing the same to one soon. Will post a feed back once I have some thing on it.
  • Moderator
    Gary Mortimer May 20, 2010 at 4:07am
    Jean Claude, you will be better asking on the OpenPilot forum

    G
  • tshado May 20, 2010 at 2:31am
    Hi David,
    I have been following your great project on the OpenPilot Wiki ands also looked at your Forum.
    I would like to connect your OpenPilot GPS to the UAV Dev Board but after reading your wiki, i have some questions:
    1)Can you please provide some details on the code modification which were done for this GPS ?
    2)Is it possible to set the GPS at 4Hz (supported by UDB code) and with which tool (if i remember there is no link in your wiki for such tool)
    3)the connection to a U-Blox connector was not clear from me...(sorry my English is not perfect)
    you mentionned
    "If you don't have and old unit, the ArduPilot uses a 6 position JST plug, the JST part is SHR-06V-S-B (Digi-Key Part Number: 455-1381-ND), our pre-crimped wires simply push in to this connector. Alternatively another option is the cable for the old EM406 unit as sold by Sparkfun here."
    I would like to keep the Openpilot connector : do i need for that to by the Sparfun connector you mentioned?
    What do you mean by "our pre-crimped wires simply push in to this connector"

    Thanks,Jean-Claude
  • Lew Payne May 11, 2010 at 10:04am
    @Rick - "I hope it is not a crime to want better is it?"

    Fortunately, it's also not a crime to be sarcastic. I'm sorry to see that you're against the sharing of knowledge in this forum.
  • Rick Steele May 11, 2010 at 7:02am
    "Have you ever considered the fact that it's mathematically impossible to compute a vector (and thus, establish direction) without at least two points? Given the fact that the GPS "raw" reading could jump 3m (prox) even when hovering in one place, it necessitates use of an averaging algorithm to steady the reading. As a result, the current filters employed in these GPS units have lag... and with lag comes delayed tracking response." - Lew Payne

    Well yes actually, hence the desire to procure a faster GPS module that maybe capable of processing those filters at a higher rate of speed and produce updates at a higher rate. Not real-time of course but at least not off by several seconds. I hope it is not a crime to want better is it?

    Regards
    Rick
  • Lew Payne May 10, 2010 at 10:09am
    "All of the units I have tried so far work fine on the plane but lag the helicopter by at least 3 to 5 seconds." - Rick Steele

    Have you ever considered the fact that it's mathematically impossible to compute a vector (and thus, establish direction) without at least two points? Given the fact that the GPS "raw" reading could jump 3m (prox) even when hovering in one place, it necessitates use of an averaging algorithm to steady the reading. As a result, the current filters employed in these GPS units have lag... and with lag comes delayed tracking response.
  • Rick Steele May 9, 2010 at 9:48am
    David, I am glad to see you are making progress. Congrats all around. I will order one to see how well it works with my current OSD/HUD and my new OSD/HUD I am waiting for finished boards to arrive now. It will be nice to finally see a GPS keep up with my helicopter so that my onscreen virtual position indicator shows where the helicopter really is when flying full speed. All of the units I have tried so far work fine on the plane but lag the helicopter by at least 3 to 5 seconds.

    Keep up the good work. I am anxiously waiting on the OpenPilot autopilot as well.

    Regards
    Rick
  • David Ankers May 8, 2010 at 1:43am
    Thanks for posting this Gary. Its nice to final get these units out there, we are really very proud of them.

    Michael, thank you for pointing out the confusing language, that was my mistake and using the word tuned was ambiguous, I have updated the wiki to correct this. Thank you!

    Brian, we tested these on a Funjet with a 2W20 on 4S at over 210km/h and doing very high angle of bank turns, we are very happy. Of course we had a choice of any GPS engine we wanted, the MTK3329 won out for us and we did a lot of testing. I say this in all honesty as this is what we found to be the best, OpenPilot is not a commercial venture all we want is a cool platform that performs the best.
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