Hi guys,
I thought I would share what I discovered today. If this solution has been found, I apologize. Most users have been trying to get their Fuze GPS to lock on to satellites. Having used several GPS phones and many Bluetooth GPS pucks, I would say I'm somewhat experienced with using GPS on the PPC platform.
I have no issues with getting a lock on my Fuze. My issue is with Fuze's GPS chip randomly stop streaming data to my GPS applications. This usually happens after the initial lock. So for example:
a) Get a lock using any GPS application (GPS Test for example)
b) Exit GPS application
c) Launch GPS application again. Fuze will take several seconds to regain lock.
d) Fuze will take several seconds again to lock in, THEN it just stop streaming data to the GPS application!
I was able to reproduce this consistently. If you're using Garmin or TomTom, they will indicate that GPS lock is lost or something to that effect.
THE SOLUTION: Turn OFF aGPS!
a) Start->Setting->System->AGPS Settings
b) Uncheck BOTH "Enable AGPS" and "Enable AGPS location information..." (under the Privacy tab)
I was able to show that this consistently resolved my GPS data stream stopping problem. I'm using the .28 radio, but try it on the stock radio to see if that works and let the community know. What about QuickGPS? AFAIK, it's not causing any problem at all.
I hope this is helpful.
After standing on my deck for 20mins last Friday waiting on locks, I follow above and get a lock in 10secs(in my living room).
Turned off AGPS was the only change
It looks like without AGPS, the GPS would just stream whatever info it had cached even if it lost signal.
AGPS would clear last state instead and so become highly sensitive to signal-loss on the next poll. It doesn't help that this device is weaker in picking up GPS signals.
Yes, turn off AGPS.
NuShrike said:
It looks like without AGPS, the GPS would just stream whatever info it had cached even if it lost signal.
AGPS would clear last state instead and so become highly sensitive to signal-loss on the next poll. It doesn't help that this device is weaker in picking up GPS signals.
Yes, turn off AGPS.
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Click to collapse
Indeed, that would be exactly how I like my GPS to behave (use the cached ephemeris data). In fact, that was how all Bluetooth GPS puck works before the advent of AGPS. I guess AGPS is a good concept, but its implementation needs to be further tweaked.
If you have not used your GPS in a week or so, then AGPS is an advantage. Daily use, perhaps not so much.
Hi,For some odd reason my quick GPS does not work anymore. My TomTom is non functional as well. I have checked my data connection and it is active. Can somebody help please.
Thanks in advance.
Can somebody please assist? I have checked my data connection and it is working. I have internet connection, for some strange reason Quick GPS and TOMTOM is not working. Is there a setting somewhere to activate this?
Thanks
Can somebody please assist, I really would appreciate a fix to this issue.
THANKS
I am having an issue with my GPS, except I got my unit 2 days ago, and can not get the GPS to work at all, with OEM rom or with any other custom rom. (it wont work with garmin xt, google maps, HTC GPS, or GPS tweak tools).
I hope I dont have a bad unit.
Strange thing, mine worked fine for about three weeks and all of a sudden it stopped working.
did either of you notice the unit getting *really* hot just before it went out? ...as in I-stuck-it-in-my-pocket-and-now-I-have-crotch-scars kind of hot?
zahbaker said:
Hi,For some odd reason my quick GPS does not work anymore. My TomTom is non functional as well. I have checked my data connection and it is active. Can somebody help please.
Thanks in advance.
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Click to collapse
When you say that quickGPS is not working, what do you mean? It doesn't display the page with the "Download" button? You press the "Download" button and it can't connect? It connects but never finishes downloading the data? What are the specific symptoms you're seeing?
I see the quick gps download button, when I click download, the message that I get is connection failed. My tomtom as well does not work anymore. I do have inetrnet connectivity, it's just the quick gps and tomtom that is not working. Please assist. Thanks
Patience
equinox2355 said:
I am having an issue with my GPS, except I got my unit 2 days ago, and can not get the GPS to work at all, with OEM rom or with any other custom rom. (it wont work with garmin xt, google maps, HTC GPS, or GPS tweak tools).
I hope I dont have a bad unit.
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Click to collapse
I've had my TP for 3 days now. As with the Kaiser and my hermes Holux bluetooth device it takes approx 5 - 10 mins to get the initial fix on satellites after that it appears to be working fine. Google maps, my old TTv6 all working fine. Takes about 30secs from startup to pickup Sats and shows about 5-7 sats everytime.
So just be patient with the initial startup. It should come.
zahbaker said:
I see the quick gps download button, when I click download, the message that I get is connection failed. My tomtom as well does not work anymore. I do have inetrnet connectivity, it's just the quick gps and tomtom that is not working. Please assist. Thanks
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What are the values of the registry keys HKLM\Software\HTC\QuickGPS\SNTP\Server1, Server2, and Server3? (I have values like xtra1.gpsOneXTRA.net.) What happens if you type that address into Internet Explorer or Opera?
When I type the address in internet explorer I get to the RX Networks webpage.
My internet is working fine, it's the gps thats not working.
Thanks
zahbaker said:
When I type the address in internet explorer I get to the RX Networks webpage.
My internet is working fine, it's the gps thats not working.
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Click to collapse
Well, QuickGPS is an Internet app, not a GPS app. All it does is download a week's worth of satellite ephemeris data from one of those servers. When you reported "connection failed" as the problem you were seeing in QuickGPS, that seemed to indicate that you weren't able to connect to the server.
So if you can get to the server, as it appears, maybe the message is about connecting to the GPS unit (to transfer the ephemeris data? Not sure about the architecture of the GPS here). What values do you have in the "External GPS" pages on the System settings tab? Have you tried the GPSTest tool? Is it able to connect to your GPS unit after you put the appropriate values into its "GPS Settings" page?
If GPSTest isn't able to connect to the GPS unit, then I think you probably have a hardware fault and should exchange your phone for a new one.
Can Someone tell me what is the exact job of the Quick GPS which is in Programs ? for me was expired and i just update through gprs and then show me some valid days remaining.
is it help to connect to satellite faster or something else ? and what happen if i don't update it? thanks.
When using WiFi, QuickGPS seems not to work if it's the first program to use the connection. If you make an Internet connection with some other program first (e.g. PIE), QuickGPS will work over WiFi. At least that's my experience with the stock AT&T ROM.
This problem doesn't seem to occur with GPRS/3G/HSDPA connections, only with WiFi.
P525Lover said:
Can Someone tell me what is the exact job of the Quick GPS which is in Programs ? for me was expired and i just update through gprs and then show me some valid days remaining.
is it help to connect to satellite faster or something else ? and what happen if i don't update it? thanks.
Click to expand...
Click to collapse
Yes, QuickGPS reduces the wait for getting your position when you first start up a mapping program.
The way GPS works is that the GPS receiver uses the positions of the satellites and the distance to those satellites to calculate its own position on the Earth. That requires knowing very precisely where the satellites are at any given time. The satellite position information is called the ephemeris.
Each satellite, in addition to broadcasting time signals (which enable the GPS receiver to determine the distance to the satellite), transmits its own ephemeris. A GPS receiver starting up from scratch has to receive the ephemeris data from each satellite it will be using before it can figure out its own position.
QuickGPS eliminates the need to receive the ephemeris data from the satellites by sending a week's worth of ephemeris data over the Internet. The GPS receiver can use that immediately instead of getting it from each satellite in turn. That significantly reduces the TTFF (time to first fix), i.e., the initial wait before you can start using a GPS-based map program.
The "expiration date" is simply the last point in time that is covered by the ephemeris data sent by QuickGPS. After that point, you have to get more data, either from QuickGPS or from the satellites.
wmm said:
Yes, QuickGPS reduces the wait for getting your position when you first start up a mapping program.
The way GPS works is that the GPS receiver uses the positions of the satellites and the distance to those satellites to calculate its own position on the Earth. That requires knowing very precisely where the satellites are at any given time. The satellite position information is called the ephemeris.
Each satellite, in addition to broadcasting time signals (which enable the GPS receiver to determine the distance to the satellite), transmits its own ephemeris. A GPS receiver starting up from scratch has to receive the ephemeris data from each satellite it will be using before it can figure out its own position.
QuickGPS eliminates the need to receive the ephemeris data from the satellites by sending a week's worth of ephemeris data over the Internet. The GPS receiver can use that immediately instead of getting it from each satellite in turn. That significantly reduces the TTFF (time to first fix), i.e., the initial wait before you can start using a GPS-based map program.
The "expiration date" is simply the last point in time that is covered by the ephemeris data sent by QuickGPS. After that point, you have to get more data, either from QuickGPS or from the satellites.
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wow, interesting, lots of new and useful information for me that i didn't know that before. thanks man.
Not seeing any 10 minute delay like you saw. Are you updating current sat location data with QuickGPS? I notived using GPStest and MS Pocket Streets that Sat connections go up and completely down all the time. Nice thing is, GoogleMaps ignores the quick downs so it LOOKS like a good connection that never disapears. don't know if this is intentional on Google's part, but it works, even standing still/walking (once connection is made). Lovin the Sat view whilst I use GPS for directions.
Same here: Quick GPS cannot connect... What is this? Maybe a server fault, or do I need to Hard Reset?
LE: Fixed it: I just run Connection Setup again, then it suddenly worked.
i just did a hard reset and quickgps will connect only after i open up a browser and googlemaps sits at seeking gps sats. i had it working 2 days ago and then my battery died and it hasnt worked since. i did notice that the phone was really warm though.
quickqps hasnt worked for me for a couple of weeks now...and i still havent fod anything to fix it
Explaining a little background.
GPS time is supposed to be collected from the gps signal, so any device that has the ability to recognize a gps signal, can sync their internal clock to the atomic clocks that are on the gps satellites.
GPS time is used on some activities, to precisely log the gps track. They are common on hanggliding and paragliding races, where we use gps tracks as the main method for measuring the performance of the competitors.
All the pilots have the same exact time on their devices.
There are some flight logger applications that uses the gps capabilities of the android devices, such as gaggle and xcsoar.
There´s also a nice application called gps time, that you can download for free from the market, in order to sync your internal android clock with the atomic clock of the gps satellite network. It does not use data but only gps radio frecuencies, so it will work without phone coverage, or without wifi on.
Last night I found out that my Inspire 4G android phone is not actually reading the gps time. I changed the internal clock of the phone on 25 minutes while unticked the autosync option.
Then when opening any gps application (gps test, gps essentials, gps status, gps time, xcsoar) the gps time would be the "wrong system time".
Testing the same on a Samsung galaxy tab without gsm capabilities (I.E. without 3g and without agps i´m guessing), the gps time would be the correct gps time, regardless of the system time that I use or miss-set.
I´ve double checked the gps time with an actual garmin gps (gecco) that I use for hanggliding, and while the samsung galaxy (android) would show the exact time, the inspire 4g will show the wrong one (all three devices were of course, having good gps readings with more than 6 sats).
So, I´m a little worried that the gps time is not being used on the Inspire, or somehow the internal clock is overruning the gps time sentences.
I´m hopping for a fix. I tried messing up with the build.prop to disable agps (set "ro.ril.def.agps.mode = 0") under \system to see if the agps was overwhelming the gps time signal, but there was no luck.
Any ideas or any help on this matter would be really appreciated.
I also invite you guys to try it for yourself.
Just download gps time, and clocksync (the last one would use network to sync the clock with an atomic clock, that should be pretty close to the gps time).
Try to see if the phone is actually using the gps time or the internal system time.
Wrong place for this buddy. This is is not development related
Ugh one of these threads again
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No!!! Wait.
It´s different from the other "NO GPS SIGNAL" kind of posts.
I don´t have a problem with the gps signal.
I put it on the developer section as there has been some software related issues around gps and fixes that seems to be related to developers.
This is definitively an issue that can cause a lot of trouble on some software developers, as any syncing between multiple devices using gps time could lead to problems.
I was hopping that maybe one of the developers that have worked with the gps drivers or the parameters of the config files for the agps will give some insight on why this is happening and if this happens to everybody or just some custom roms.
If the problem affects all the roms, then It should be addressed by the developers, I´m guessing.
Mods please consider deleting or moving due to not being in The correct thread.
Sent from my Desire HD using Tapatalk 2
cwhitney24 said:
Mods please consider deleting or moving due to not being in The correct thread.
Sent from my Desire HD using Tapatalk 2
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+1. Think I'm in wrong thread too.
If you can read this, I's been a drinkin