GPS and power consuption

[Tiberius23]

Hi,

today I upgraded my htc3600 to test gps version, and gps work's really nice! But I can't find gps on/off button and wondering is gps working all the time or just when gps programs running!!?

Regards

[Mikroft]

I believe it's auto on off. Because after a certain time if I leave my navigation software off and turn it back on it has to redetect the satellites. But I could be wrong. Then again I don't notice any difference in uptime. Still get about 2 days per pull charge.

[Tiberius23]

I believe it's auto on off. Because after a certain time if I leave my navigation software off and turn it back on it has to redetect the satellites. But I could be wrong. Then again I don't notice any difference in uptime. Still get about 2 days per pull charge.


ok, i believe so.....

tnx

[adewidt]

ok, i believe so.....

tnxGPS will be activated as soon as an application send a request on com-port 9. By default GPS is off. When a program stop listening on com-port 9 the GPS turns off.

Furthermore GPS requires little power usage. In a common Bluetooth GPS mouse the bluetooth radio part consumes most power.

[forcedalias]

Guys, so can we confirm that it's GPS and not A-GPS? And yes, I'm a rookie in the field.

[wowpeter]

A-GPS and GPS are both working GPS... it is just that A-GPS also incorporate additional functions which allow position fixing based on cellular network position signal. In fact, A-GPS is better than normal GPS in city environment as it allow quicker and more accurate position fix when compare to just using GPS satellite along. I hope this will make it more clear to everyone regarding A-GPS and normal GPS... they are both the same thing but A-GPS is better for city environment.

Anyway, just my two cents.

[forcedalias]

A-GPS and GPS are both working GPS... it is just that A-GPS also incorporate additional functions which allow position fixing based on cellular network position signal. In fact, A-GPS is better than normal GPS in city environment as it allow quicker and more accurate position fix when compare to just using GPS satellite along. I hope this will make it more clear to everyone regarding A-GPS and normal GPS... they are both the same thing but A-GPS is better for city environment.

Anyway, just my two cents.

Yes, I understand that A-GPS may allow you to get your position quicker because it's assisted by cell towers but what I don't understand is that I don't know if cellular towers must be present for it to work? In other words, can I use A-GPS in the middle of no-where? If not, then I need GPS and need to know if the Trinity has GPS or A-GPS...

[The_Stranger]

Yes, I understand that A-GPS may allow you to get your position quicker because it's assisted by cell towers but what I don't understand is that I don't know if cellular towers must be present for it to work? In other words, can I use A-GPS in the middle of no-where? If not, then I need GPS and need to know if the Trinity has GPS or A-GPS...
In my country, A-GPS is not supported by the mobile operators. However, my trinity doe have functionable GPS, therefot, the GPS will work without celltowers...

(allthough in my opinion, the quality of the GPS recieving is poor at best)

[Matterhorn]

Yes, I understand that A-GPS may allow you to get your position quicker because it's assisted by cell towers but what I don't understand is that I don't know if cellular towers must be present for it to work? In other words, can I use A-GPS in the middle of no-where? If not, then I need GPS and need to know if the Trinity has GPS or A-GPS...
A-GPS assists, it doesn't need to be there for the GPS to work, the receiver just locks in slower without it. You could be out in the middle of nowhere with no phone service but GPS is still sending signals from space and the GPS receiver will work. It would be stupid to have GPS that only worked when there are reliable cell towers...we know how reliable they are :) .

[Hacker@lho]

Hi, anybody with this test rom can do a benchmark for battery life with gps always on and see how long it lasts?

tks

[forcedalias]

A-GPS assists, it doesn't need to be there for the GPS to work, the receiver just locks in slower without it. You could be out in the middle of nowhere with no phone service but GPS is still sending signals from space and the GPS receiver will work. It would be stupid to have GPS that only worked when there are reliable cell towers...we know how reliable they are :) .

I was under the impression that towers were necessary the way everyone's always bummed out to hear that a phone's GPS unit is an A-GPS one. Glad to hear it's better (?).

[Tiemen]

I found a link at wikipedia.com that gives a good explanation of a-gps.

http://en.wikipedia.org/wiki/A-GPS

[Ulti]

Hi, anybody with this test rom can do a benchmark for battery life with gps always on and see how long it lasts?

tks

Nobody :confused: ?

Mfg Ulti

[adewidt]

Nobody :confused: ?

Mfg Ulti
I did not a benchmark but my experience are very good.

I drove 2 hours and had a battery drain of 10%.
If the battery drain scales linear it means I can drive 20 hours nonstop.
I think 20 hours is not possible but you can easely drive up to 8 hours on your battery.

[Ulti]

Hi,

wow 8 hours that´s enough ;) !

in how is the signal quality by comparison
with an SIRF III or another GPS-Mouse ?

Cu Ulti and THX !

[The_Stranger]

Hi,

in how is the signal quality by comparison
with an SIRF III or another GPS-Mouse ?

Cu Ulti and THX !

In my opinion not as good as a stand alone GPS. I own a SiRF XTrac GPS (royaltek rbt1000) and it is far superior. P3600 fix times are in the multiple minutes sometimes/mostly, and reception is worse. My stand alone GPS almost allways recieved 6 to 10 satellites, my P3600 usually 2 to 4, sometimes only 1, hardly ever more then 5

[Mikroft]

I just tested my built in GPS in downtown area, lots of buildings. It cannot always hold the signal and drops sometimes. The standalone has never dropped a signal for me yet.

[Ulti]

Hi,

that makes me sad :p !
Is there a possibility to improve the quality with a new ROM ?
I don´t think so but perhaps somebody knows more than I :D !

Mfg Ulti

[Mikroft]

Hi,

that makes me sad :p !
Is there a possibility to improve the quality with a new ROM ?
I don´t think so but perhaps somebody knows more than I :D !

Mfg Ulti
Well I mean if you're not in downtown core area it works fine. Still takes a bit longer to get a fix than my BT unit but other than that it works fine.

[alvinlim28]

Hi,

wow 8 hours that´s enough ;) !

in how is the signal quality by comparison
with an SIRF III or another GPS-Mouse ?

Cu Ulti and THX !

I did a comparison between the trinity internal GPS and a SiRFIII GPSr.
http://forum.xda-developers.com/showthread.php?p=1123327&posted=1#post1123327

Have a look for yourself. :-)

[bebaer]

Thank you for this report ;)
Very interesting