Question about HP iPAQ hw6515 Pocket PC

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GPS working intermittently

My iPAQ has developed a problem with the GPS, which is probably the same as being described in this forum.
I saw your comment regarding Global Locate being purchased and the LTO files no longer being available. However, I think this may not be the problem. There are two reasons why I think that:
1. The GPS sometimes works fine and sometimes not. The LTO files still download regularly and about 1 in 3 times the file is perfect and the GPS locks within 5 to 15 seconds. At other times not only does it not lock but no satellites at all appear in a satellite viewer window. WHen I say no satellites I mena not even a satellite with no signal but none at all.
2. I disabled the downloading and the GPS still works erratically. Sometimes it gets a lock after a few minutes whereas at other times it will spend 20 minutes with a clear sky and despite receiving a strong signal on some 9 satellites it fails to lock.

I've been using the iPAQ GPS for about two years without any problems at all and was very happy with it until about 2 weeks ago when it developed this problem.

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  • metony Mar 29, 2008

    I have the same problem and have tied it down to the LTO.dat file that is downloaded. Everthing works fine from about 12:00 GMT till about 22:00 GMT. Outside of these times I have to rename the LTO.dat file, typically to LT.dat. The unit then works but without the AGPS and attendant long time to first fix. HP and Tom Tom have been of no use at all and I an unable to get a reply from Global Locate (now Broadcom). I suspect some sort of incompatability between the LTO.dat files, which I suspect are being generated in a different way to in the past, and the clock function of the PDA.

  • sammendac Apr 01, 2008

    Was given a 6915 which had not been used since 2006. 6915 told me the file had expired but cannot upload the updated file cos Global Locate was bought. Symptoms are exactly the same. It takes Tom Tom twenty mins plus to lock on and then keeps dropping the signal.



    HELP!!!!

  • Anonymous Apr 09, 2008

    I have the same problem. Neither the SAT Nav nor the avionic Nav are working. At times, the lock on the sat is very sporadic, which is a problem whilst flying. I have for the past two days, not been able to connect at all. I specifically purchased this unit for the GPS function, and have had no problems over the past two years.

  • Anonymous Apr 21, 2008

    In my office, about six hp 6515s hahave same problem. From the begin of march 2008. We upgraded bios from 1.06 to 1.26. Before upgrade neither start receiving. After upgrade, it now start receing but work intermittently and not fix correctly. If you delete the file lto.dat in the folder applicationData->GlobalLocate->gpsct the receiver will become stable (non intermittently) but the fix is slowness.

    I think that the file structure of the file lto.dat changed and our bios not support that.

  • Lister6520 Apr 22, 2008

    I found a version 2.02 of the global locate software that solves the problem here:

    http://www.gpspassion.com/forumsen/topic...

    I installed it and now my 6515 is working as good as new. Actualy it seems to work even better. It gets a lock within about 10 seconds or less if I let it download the LTO files.


  • Anonymous Jun 20, 2008

    I had exactly the same problem with my iPAQ hw6515 (Cingular - AT&T), the GPS working intermittently. I followed the process indicated by Lister6520, downloaded the .cab file and installed it as indicated. I have the TomTom Navigator 6 and after I called it I got a satellite fix in about 90 seconds.



    My very special thanks for Lister6520 for his recommended solution and to this site which it is providing these great problems fixes information.



    Thanks again and best regards to all.

    Carlos

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5 Answers

Here is what I have done over the summer to ease the situation.

Downloaded and installed Mortscript. I use this to set the comms port to select either the internal AGPS or Bluetooth. (Note. I can't get it to select the Bluetooth profile, only remind me to select it. I also don't know how to automatically de select the bluetooth profile. If anyone can help, it would be much appreciated.)

Upgraded the Quick GPS version to 2.03 and disabled the POI's.

Using Tom Tom version 5.21 and bluetooth, operation is flawless.
Using Tom Tom version 5.21 and internal GPS limited tests seem to indicate it does work OK

Using Tom Tom version 6 (free download), again with QGPS version 2.03 and the POI's disabled, operation is OK....except, there has to be an except doesn't there! Occasionally the screen will lock up. Voice instructions continue as normal. This seems to be more prevalent with the internal GPS, presumably due to the extra processing needed. The fix is to start and then stop another function. I start contacts as it is on a hardware button. The reason is allegedly due to slow memory card access times. As of yet I have not tried a faster card.

Posted on Oct 03, 2008

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With ref to the downloaded files. There are 5 sets of files on the server.
2 Day
2 Day version 2
7 Day
7 Day Version 2
All of the above appear to be updated once per hour although none of them now seem to work for me with Global Locate's version 1.19 software. There is also a 10 day version which seems not to be updated any more. There are notes on the internet that explain how to edit the registry to make the software point to an appropriate area for the correct file. If you are pointing to the 10 day version it might be possible to point at the 2 or 7 day versions and recover the situation. There are only two lines to edit but bear in mind all the warnings about editing the registry

Posted on Apr 01, 2008

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  • metony Apr 24, 2008

    Thank you Lister 6520. The 2.02 certainley gives a fix, but with my hardware it does the same as versions 2.03 & 2.06. That is, when used with TomTom on a journey, the GPS position suddenly changes after 5-10 minutes and eventually shows a position up to 3/4 of a mile away from the true position. If the vehicle is stopped it can take up to 10 minutes for the GPS to show the correct position again. (If the software is stopped & restarted the position is correct but the same sequence of events starts again as soon as the vehicle starts moving). I'm going to try and search for an older version somewhere between 1.19 and 2.02 to see if that helps.

  • metony Apr 25, 2008

    Further to my comments yesterday I have now found out the following.



    Global Locate's versions 1.19 and 1.27 do not work as per original observations.



    Global Locate's versions 2.02, 2.03 & 2.06 all will give a fix at any time.



    Version 2.02 seems to work OK whilst on the move if you hide the POI's. I assume that versions 2.03 & 2.06 will also work OK if POI's are hidden. I found a ref to this whilst searching for more software versions.



    In order to overcome the problems with the internal GPS I bought a Bluetooth reciever. This works even better than the internal GPS holding on to satalites in some multi storey car parks where the internal unit fails. It is faster to find a fix and seems to operate much better than the internal unit in all areas.



    However when stopping TomTom, the file GPSCT.EXE continues to run, using up resources. Either starting and stopping another program e.g.VisualGPSce or resetting the device is the only way to stop gpsct.exe.



    As TomTom 5.21 on the 6515 does not seem to offer a configuration screen, even after hard and soft resets, I have changed the comm port in the registry to get the Bluetooth unit to operate, but does anyone know any further "hacks" to stop gpsct.exe when TomTom exits?

  • metony Apr 27, 2008

    Further to my comments of the 25th.



    A longer test of TomTom with version 2.02 reveals that it does indeed "go walk about" after 10-15 minutes travel - but not every time! POI's are still hidden. It works better that way but it does not appear to be the full cure. I might try versions 2.03 or 2.06 or I might just stick with the Bluetooth option if I can find a way to automate the stopping of the gpsct.exe file after exiting TomTom. I might even try asking TomTom!

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I have the same problem and I'm very surprised in understand that several HP6515 are affected! I suppose that the problem could be the failure in the A-GPS (Assisted GPS) system by Global Locate after March 2008. Probably, the all QuickGP versions (I have the 1.20 in my HP6515) are unable to "offer" correct information to A-GPS and, in consequence of that, the internal receiver does not start at all! Indeed, VisualGPS does not reveal GPS receiver when tomtom does not fix satelites.
Now, I tried the Quick GPS Connection Factory reset (1) Tap > Settings > Connections >Quick GPS Connection 2) Tap the About tab. 3) Tap the Advanced... button 4) Tap the Factory Reset button) and I done as the first time the satelite fixing, after update QuickGPS data. At to the present, the GPS is still working after 3 day..but I don't know if it could be a solution!

Posted on Oct 03, 2008

  • joseterra Oct 04, 2008

    ..no, the reset to the factory setting of QuickGPS is not a solution: the internal agps works intemittently again!



    I'm sure that the problem is the software correlation between QuickGPS and the AGPS receiver and not because of peculiarity of QuickGPS (since I tried with other software, as G-QuickGPS and others, and the intemittence is still acting) but of the information that AGPS has to reading in the lto.dat file..indeed, as mentioned before by in this discussion, if one delete the lto.dat file the AGPS works (actually, very slowly it does a fix)!

    No idea at to the present :(

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I have found this topic very helpfull. I have been on various PDA,GPS bloggs etc and no one has a solution. Does any one know how I update the version. I am using V1.19 and as someone posted when I download the files everything works fine for the first 12 hrs. I then come to use it the next day and I can not get a lock and I get an error message stating 'no gps device'. I understand that updating to V2+ will not solve this problem but I hope it will improve my current situation of driving for an hour without getting a lock!!!!!!

Please pick this subject it seems a big problem with little info?

Posted on Jun 05, 2008

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Does anyone have any other updates to this problem?
Has anyone tried contacting either TOMTOM or HP tech support?
Any help would be greatly appreciated?

Posted on May 14, 2008

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