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.
Click to expand...
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.
Related
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.
Click to expand...
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.
Click to expand...
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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Click to collapse
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.
Click to expand...
Click to collapse
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
I know there are MANY threads to the GPS issues and I am not having problems with GPS lag. I have searched and read and already have the tweaks installed (running the Elite rom rc2 which already had all the tweaks setup) and changed the no data sleep timeout to 1.5 seconds. I also tried on my original radio version, 32 and now have 28 and see no difference in GPS lock times. It will never lock on using Google Maps or iGuidance. In google Maps it says "seeking gps satellites (0)..." for about 5 min then says your gps receiver is having trouble tracking satellites etc. The only way I can get it to work is to use GPS Test, let it get a lock which usually take 5-10 mins, then close GPS Test and open either Google Maps or iGuidance and it will then work fine.
What is also strange is that when using GPS Test, the only way I can get it to work is to have the GPS info set to auto. It will scan then find the gps on com port 4 and 9600 baud. Then it will start up and try to lock on. The next time I run it it will already be on com port 4 and 9600 baud but won't find the gps device. I have to set it back to auto, and restart GPS Test, then it finds it.
There has GOT to be a way to fix the gps lock time on this thing. I have tried with A-GPS on and off and tried with quick-gps and saw no difference in lock speeds. Interesting thing though, I guess Google Maps will using cell tower location to identify where you are? When I use it without gps being turned on, or while it is searching for satellites, and I click "my location" it gets a fairly accurate location on the map.
It seems to me that the issue is with the com port and communication. Almost like the gps won't come out of sleep mode or something and gps test is the only program that can "wake" it.
Thanks for any info.
I am in the exact same situation as you. My TP fails to lock satelites 98% of the times i try.
I have read everything posted about TP GPS on this forum, i have tryed most ROM's and almost all available radio's, i have tryed most tweeks and all that in different set-up.
And after all that my GPS lock's rarely (2-5% of the times i try), and most importantly it doesent seem to be related to the radio nor to the ROM. At this moment i tend to think that i was unlucky with my TP that perhaps is from a lot of TP's with retarded GPS module.
From the forums it seems that most of the ppl dont experience this extrem problem with the GPS, it seems that most of the ppl around only experience laggy gps module update.
Atm i am still waiting for Elite RC3 hopeing that perhaps they'll bring a new gps driver, that will solve my problem.
In case Elite RC3 doesent help i will revert to stock hard-spl/radio/ROM and ill take it to the warranty service.
Sadly this problem with the GPS from my TP blackens my experience with it.
Are you guys sitting in your homes trying to get a lock? because then it is very unlikely you'll ever get a lock.
I have to go outside and wait about 1 minute to get a lock and then its fine. However, I DO have to use the HTC gps tool to get a lock before I can use google maps or any other gps program.
I am outside with no obstructions. I did find this app and may play around with it. So far I havne't been able to get it to get a lock unless I use GPS Test first.
http://www.geoterrestrial.com/gpstoday/
My Telus Touch Pro locks in 3-5 seconds every time after modifying the GPS and adding the correct IP settings for Telus' AGPS. This combined with OCN8 makes for an excellent GPS device.
The guide for the GPS hack was from this forum, just can't recall where.
I have the same problem with GPS Test as you all described. I am now running qsqa's PROven ROM and I noticed following: GPS Test often fails to start-up the GPS receiver, but VisualGPSce worked every time I tried. It is a free software, included in the PROven ROM. If u use a different ROM, you can download it from here: http://www.visualgps.net/VisualGPSce/default.htm
Give it a try, it sure helped me!!!!
Hi guys! New to the forum and the Android OS. I've just purchased the Nexus S a couple of weeks ago and the phone is great except for a couple of minor details, but one thing really bothers me is the GPS. When I'm connected to wi-fi, Google maps is able to tell me my location fairly accurately. However, outdoors with no wi-fi, I try to have the settings to locate me based on satellite, but that always give me a "your current location is temporarily unavailable" message. I'm basically completely outdoors with view of the clear blue sky and it will always give me this message. Is something wrong
I've searched on the forum but nothing that answers my question. Anyone?
Hi,
Based on your question I am not shure if you are aware of the following:
GPS is only one of several location detection methods used by your phone. Another one is based on WIFI hotspots in range. Basically the phone scans the wifi frequencies to look for ALL hotspots in range and then sends this list of hotspots to google (only if some kind of internet access is available to the phone!). When this combination of hotspots is known to google, your phone gets an estimated location back from the google server. So from what you write, it is possible that you never had a gps fix, even when you got a (fairly good) location based on wifi.
I suggest you install some gps software other than google maps to check the functionality of your device. I use "GPS test", should be on the market. All it does, is scanning for satellites and displaying the list of discovered satelites. When the signal is good enough, you get a "U" in the column "flags" for the locked satellites.
Attention! You must start the scan manually from the apps context menu.
cheers
Yeah you gotta turn on your GPS for a more accurate reading if you're using maps or other navigational app
Sent from my Nexus S 4G using XDA App
Just an update. I haven't needed to use the GPS lately, but this week I decided to try again, and before, I have gotten a GPS fix with the GPS Test app. But that signal never lasts very long and it also takes a really long time for the app to use the satellite to lock on to my location. The GPS indicator on the top left of the app is usually yellow and only after a long time does it turn green, but sometimes it never turns green even with 7 or 8 satellites in view. Is this just a limitation of mobile GPS in cell phones?
I don't have a data plan so I can't connect to the internet while on the road, hence the need for GPS without having internet access.
As long as you have the SIM inserted, not on airplane mode and gps is turned on, and nothing is wrong with your phone hardware I don't see why it shouldn't get location fix outdoor.
There are some good offline maps like Osmand and MapDroyd.
Can't get a GPS lock when using the turn-by-turn nav. It says "Searching for GPS" for like 5 minutes.
Anyone else have this problem? This is on the EP3 leak as well as the EP1Q leak.
Download faster fix from the market, I had the same issue. Now it locks on immediately
Sent from my SCH-I510 using XDA App
Any options/ideas for non rooted phones?
Download an app called GPS Status from the Market. Start it up, go into the menu, and select "Manage A-GPS State". Reset A-GPS and then downloan new A-GPS data. Go back to the main screen of the app and leave the phone with a clear view of the sky. You should see the visible satellite count (the second number) go up pretty quickly, but it may take a while for the empherisis data to finish loading from them...5-15 minutes at the long end. Once that's done, you should be able to get a lock pretty quickly from that point on, so long as you start up the GPS and let it get a GPS lock at least once every two or three days.
EDIT: I just wanted to make a note here, after seeing all of the "GPS sucks" threads about this phone, that people have gotten very spoiled by modern handheld GPS units with ultra-high sensitivity, 20+ channel receivers. This device is a phone that has a very capable GPS chipset, but it doesn't have the receiver sensitivity of a dedicated unit, and you can't expect it to perform as such. According to the GPS standard, it's perfectly expected for a GPS unit to take up to 15 minutes or longer to get a location fix if it is starting up cold...that is with no almanac data stored. The AGPS states will contain some of this, but some of it still has to come straight from the satellites...namely the empherisis data that tells the *exact* current state of the satellite in use and the rest of the constellation. Modern dedicated GPS units have receiver sensitivities so high and have so many receiver channels that they can poll a lot more satellites a lot more quickly and effectively than this phone can in order to build this almanac initially, and even then, it can take a couple of minutes. Once the almanac is built, the course satellite data will be available for a few days out, and as long as it stays up to date, the system will only have to make small corrections. Once the almanac expires, the system has to rebuild it from scratch, and that takes a while, as the system bandwidth of GPS is quite small.
Hi all,
I'm going on holiday and would like to use my Android (Galaxy Tab) for offline navigation. I'd like to keep my GSM module switched off all the time to avoid data roaming charges. I'll do my surfing etc over WIFI where available.
I'd like to use AGPS for a quick satellite fix.
Can I download AGPS satellite data over WIFI, or does this require a GSM (GPRS/UMTS) connection?
How do I manually trigger AGPS download on Android?*
Help is much appreciated!
N.
* On the Windows Mobile devices of old there used to be a program calles "QuickGPS" or similar that would download AGPS satellite data, but I don't see any such option on Android - - ?
Android GPS requires a LIVE data connection to function with realtime navigation, if u are just using Wi-Fi this won't work.
On the other hand, assuming u have a hefty sdcard in your tablet, u could use "sygic GPS" from market, that WILL allow offline GPS.
icenight89,
I'm using Navigon, which keeps map data on board, no data connection required there. Sygic is another option. Google Navigation does require a live connection, but Navigon, Sygic and others do not. Storage required for on-board map data is not all that massive btw, my Navigon maps of Europe require ~ 2 GB.
My question was more on the point of assisted-GPS satellite data. How do I download current satellite data so that my GPS knows where to look (thus getting a quicker satellite fix) if I want to avoid a mobile data connection via GSM?
Once I have a GPS fix, offline satnav is no problem.
Any ideas there?
N.
Android downloads agps data automatically, there is no way to "force" an update. U could try connecting to wifi and then running android nav (google maps/navigation) with GPS enabled, that would cache the new data I presume. That's your only option really
On a side note, I consider 2gb for one sole app a lot, whether its maps or not lol
Um, GPS Test software lets you do this.
syl0n said:
Um, GPS Test software lets you do this.
Click to expand...
Click to collapse
Five years later, google lands me on this thread because I too was asking "can I update AGPS over wifi?". (Empirical evidence: I can, because at the trail-head I get a lock in about 10 seconds. On the other hand, maybe it didn't update, and the GPS hardware/antenna is just that good. )
And since answers were given without answering the question, I will keep looking.
But as for GPS Test, it is essential. Prior to using any nav app, I open GPS Test and watch it get a lock, or not, because the satellite display shows me exactly what is going on, as opposed to the nav apps, which just sit there maybe getting a lock maybe not and you have no effing idea why.