Is there any application available that can calculate acceleration (not distance over time but m/s2) and g-force over gps data? I know there are this kind of apps available on devices equipped with g-sensor, but i think this kind of data could be calculated with data got directly from gps...
Related
Can anyone tell me how I access the gps and digital compass raw data?
I am currently writing an application but am unsure how to access this data from the device.
Thanks,
Michelle
Make a call to the GPS COMM port then parse the NMEA data that streams in to extract what you need, Lat, Long, heading, speed (in knotts) will all be found in the GPRMC line, if you need altitude you will need an extra line from the GPS but the accuracy of altitude is not very good to be honest - what are you scripting? - Mike
These are MSM7200 Data Sheet:
http://www.ent.eetchina.com/PDF/2007FEB/DTCOL_2007FEB15_AVDE_RFR_AN_01.pdf?SOURCES=DOWNLOA D
http://www.qctconnect.com/products/gpsone.html
• Next-generation gpsOne ® Assisted-GPS solution, with an enhanced GPS engine for greater sensitivity and faster start times
• Enhanced filtering software optimizes GPS accuracy and availability for tracking and satellite navigation applications
• Full integration with JAVA and BREW-based development environments to support commercially deployed location services
• Support for MS-Assisted and MS-Based modes, and Standalone GPS mode which enables off-network support
• Support for UMTS Control Plane, GSM Control Plane and OMA SUPL 1.0 User Plane Assisted-GPS protocol
• Supports multiple modes of GPS, inclusive of standalone, MS-Based, MS-Assisted, Hybrid, and gpsOneXTRA™ Assistance
• Enables enhanced standalone GPS through gpsOneXTRA Assistance
• Supports – 160 dBm tracking sensitivity
• Standalone TTFF Hot, Warm Cold (1s/29s/35s) respectively
• Compatible with Qualcomm's QPoint Location Based Server as well as 3GPP and GERAN compliant location servers supporting UMTS control plane and GSM control plane and OMA SUPL 1.0
So,from that spec, i-Mate ULTIMATE 9502 and all MSM7200 based gadgets must have Assisted GPS feature as well as gpsOneXTRA™ Assistance. But, mine is not assisted nor have gpsOneXTRA™ Assistance.
The QUESTION IS: How to enable that feature?
YEah mine took ages to acquire sattelites. I bet ts another 'optional' software implementation for the MSM7200 that I-Mate didn't bother with like graphics drivers
Sign a petition!!!
how about if we make a site like HTC Class Action,make a petition and force imate to make our so called "ultimate" device become the true ULTIMATE as advertised? do lawsuit or something like that... or all the gurus and programmer here develop the driver and enable all the feature that supposed to be enabled...
Coz, we pay for it.. We must get it... just like Kaiser case...
9502 is not cheap, and we MUST make it ULTIMATE!!!
Correct me if I'm wrong, but didn't the Kaiser class action get absolutely nowhere?
And making drivers takes a lot of time and money. It's taken all this time with the Kaiser and the people trying to develop it have only really scratched the surface.
True true...
yup,you're right,some guys on forums.imate.com mentioned the same... HTC doesn't bother to do anything yet... so does imate... sigh...
My Samsung Focus only gets GPS position updates once per second (1Hz). At 100kmph (~62mph), you've already moved ~28meters or 91 feet. Thats pretty inaccurate.
Are there any WP7 phones with built-in GPS that update more frequently than 1Hz?
$40 external Bluetooth GPS units update at 10Hz and some wired usb units update even faster than that. But Microsoft isn't supporting the SPP Bluetooth profile even with Mango update and I see no way to communicate with a generic USB device through the micro-usb port cause you don't get native access to write a driver. So no luck getting external GPS working with the current framework
I'd like to build a list of the GPS update frequency of the various phones out there. Hopefully they are not all using the same crappy GPS chip...
10 Hz GPS update will drain your battery much faster... Also, GPS software have some interpolation algorithms. From my own experience with Navigon 3.0: I very like WP7's default GPS accuracy.
Thanks.
I don't care about battery life though; my scenario has power cable available (non-hand-held scenario).
The compass and accelerometer sensors are available on my device but unfortunately the Samsung Focus does not have a gyroscope.
Accelerometer and compass samples at 50Hz, but they are fairly noisy. The new Mango/7.1 Motion API should help filter some of that noise and maybe I could get a reasonably accurate equivalent of a 2Hz GPS with some tricky math.
Double the accuracy is double the accuracy!
BTW, for what kind of tasks you need this accuracy? As I said before, Navigon 3.0 (see corresponding forum) works very fine and precisely, as a standalone Garmin, for example (what is internally also WinCe device ).
I'm not doing GPS maps. Everybody's done that Mine is more of a real-time motion analysis and visualization. I don't want to give away too many details cause I don't want someone to beat me to the punch. I do know that nobody has an app that does what I want on the marketplace yet.
OK, it's up to you. Take a look to my advice : http://forum.xda-developers.com/showpost.php?p=15982827&postcount=574
Sent from my SCH-I800 using XDA Premium App
Oh cool. I wonder if mine is set to 1000 impliying 1Hz updates. 500 would be 2Hz updates.
But I reckon when submitting an app to the marketplace you're not allowed to edit the registry
Hi,
I have Hero H7000 GSM phone with Android 2.2.1. Some application which using GPS data show speed approx. 1,9x higher then real speed. First my idea was about some mistake in sw - behaviour looks like as twice conversion from knots (nm/h) to km/h because (km/h = 1,852x nm/h)... But problem is generic for all applications using GPS data. I was use U-Blox app. for NMEA logging, and in RAW NMEA log zero speed is correctly received. But Android API provide 1,29m/s for applications. Do you have some idea where problem is locate? And idea about how to fix it?
Thanks
SDG
ACTUALIZATION: I made NMEA log (approx. 30km by car). In raw NMEA sentences captured by "u-center" is correct speed. Maximum is around 90km/h. But all applications using Android API show twice more. Please, do you have some idea about repair of this bug?
SDG
Plz see the Attached GPS Architecture diagram 1st before reading below Article:
Location Services using GPS in Android consist of following Architectural Components
1) GPS Chip
2) GPS Driver
3) GL Engine
4) Android Framework
5) User Applications
Now Lets Understand each
GPS Chip: Radio Frequency Receiver that directly communicates with GPS Satellites
GPS Driver: GPS Driver System Software that uses Low level API’s to Communicate with the GPS chip, at the system level it may consist of a single or multiple files located at /System/Lib/hw/ Or /Vendor/Lib/hw/ files names usually starts with Prefix GPS and Postfix So (i.e gps.default.so or gps.aries.so e.t.c) depending upon the Android version and Smartphone Platform.
GL Engine: Actually the heart of this overall system.
At System level it consist of files at Path /system/bin with names like glgps or gpsd (Platform Specific)
It works using the Configuration Parameters which consist of .xml and .conf files (i.e glconfig.xml, gps.xml, Jupiter.xml, gpsconfig.xml and gps.conf, secgps.conf e.t.c). The Physical Location and names of files again depends upon Android version and Platform, but they are mostly at (/system/etc , /system/etc/gps , /vendor/etc/, /data/gps e.t.c), depending upon the Configuration and Platform, it takes initial Location Information from Cell Towers, then it take it read NVRAM , it is most important as here it store assistance data from GPS Lock, and it may also use xtra data.
NVRAM information is mostly location at /data/gps in a file with .sto ext (i.e gldata.sto) and xtra data files (lto.dat, xtra.bin, epo.dat e.t.c Platform dependent),
Using all this information Gl Engine instruct / Assist the GPS Driver, mostly Gl Engine is able to Detect multiple GPS satellites for which it is GPS driver is Programmed, but to Lock it need some extra information (Timing, Alm. / Emp.e.t.c) which it could either download from GPS satellites (Standalone Mode: very slow speed bits/sec.) or it could use internet to access SUPL/NTP servers (MS Based/MS Assisted Fast speed MB/sec.)
After all this activity, it saves all the data in NVRAM for future use.
Android Location Services : It consist of Android Framework Classes like Location Manager that Provide services to the use applications using the GL Engine.
User Applications: Location services Applications like Google Maps, Sygic, Navigon , TomTom e.t.c.
Keeping all this information in mind now lets see how the GPS Faster Fix Solutions in Market do.
Faster Fix Solutions like GPS Status & Tool Box, GPS Test, GPS Doctor e.t.c mostly handle two things.
1) Download XTRA Data (lto.dat , xtra.bin , epo.dat, gldata.sto e.t.c)
2) Modify GPS.conf (Root Required)
But this not always works.
Devices uses Google as Supl Server but most devices are unable to use it due to invalid/expired certificates and Google servers rejects the Assistance requests in such scenario Users should use SUPL.NOKIA.COM:7275 , which although slow (but something is better then nothing)
If something is wrong with GL Engine or GPS Driver, it may need Re flashing but a little could be done if GPS Chip Reception is Low or Problem is at Hardware Level, some time need soldering skills for hardware alteration (Risky)
http://forum.xda-developers.com/showthread.php?t=1318892
The Other Configuration Parameter which users could modify is xml Configuration file( Take Backup 1st) at Least a Programmer could get Debug Log to understand where things are going wrong, using below parameters.
cLogEnabled="true" acLogDirectory="/sdcard/gps" and LogPriMask, LogFacMask and also DEBUG_LEVEL (gps.conf)
Hope everyone could easily improves their GPS Performance using this guide for any platform.
Wow, thank you, this is very useful!
Neat! Thanks!
hi
can you please explain the extensive location settings from google maps ... i searched google's help and i'm still confused.
for eg, what is the difference between "report from this device" and "enable location history"?
i guess they generate the trafic info using the data from our phones ... how?
thanx!
Happy Holidays! and Happy New Year!
jean2323 said:
hi
can you please explain the extensive location settings from google maps ... i searched google's help and i'm still confused.
for eg, what is the difference between "report from this device" and "enable location history"?
i guess they generate the trafic info using the data from our phones ... how?
thanx!
Happy Holidays! and Happy New Year!
Click to expand...
Click to collapse
'report from this device' is used in latitude. latitude allows you to share your location with your 'friends'. 'enable location history' is for you only and keeps a record of everywhere you go. or at least thats my understanding of it. hope this helps
Thanks for this "sort of" schematic! Keep on making some new schematics! :cyclops:
Dude i dint think ill tamper with gps in my life but the info you provided is just to simple and cool. thanks
mbbauk said:
Dude i dint think ill tamper with gps in my life but the info you provided is just to simple and cool. thanks
Click to expand...
Click to collapse
I agree. I've always enjoyed learning about gps starting from my Garmin iQue days. After suffering with the Captivate and that horrible gps it's nice to have a phone with fantastic gps and the ability to truly use it. Good stuff here!
Sent from my SG Note i317 via XDA Premium...I eat apples, not use them.
Hi
Speaking about GPS, is there any onchip limitation regarding the speed or location that it should grab GPS signal ?
Someone told me that it may not be possible to make it work in a plane because of US rules and security.. or around some sensitive FBI or Governments buildings (that may have signal killers) ?
Thanks
ak074 said:
'report from this device' is used in latitude. latitude allows you to share your location with your 'friends'. 'enable location history' is for you only and keeps a record of everywhere you go. or at least thats my understanding of it. hope this helps
Click to expand...
Click to collapse
first ... with both disabled ... maps and search still search your location .. which is strange ...
second ... if i enable location history, but not report from the device ... there is no history ! or i don't know where to find it ... cause, indeed it's not in latitute ... you can select "report from the device" without selecting history ... not sure if anything happens ...
Happy New Year!
wow mind blowing and extensive work to understand all this about global positioning system ...
Simple question to OP
Can the Broadcom chipset XTRA file- lto2.dat be used for Qualcomm chipset XTRA file - xtra.bin ? and vice versa?
Thank you.
popcorn1122 said:
Simple question to OP
Can the Broadcom chipset XTRA file- lto2.dat be used for Qualcomm chipset XTRA file - xtra.bin ? and vice versa?
Click to expand...
Click to collapse
To My Understanding and Experience "NO",
putting lto2.dat file in a Qualcomm Android Phone do not improve Time To First Fix (TTFF), did'nt experimented BroadCom.
also contents of both files seems different, MediaTek processors uses EPO files instead, but it is astonishing that lto2.dat do improve their TTFF.
But no technical document to prove these experimentation .
US past policy do restrict the use of GPS above certain altitude (to deny military use of GPS), but cell phones still acquire navigation using GlONASS in Planes.
Can anyone tell me which files are responsible for GPS? I used TitaniumBackup and I suspect that I deleted these files by mistake because now I do not receive a signal outside the building
Lollipop 5.0.1 GT-I9505