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Following reports elsewhere of high temperatures being generated when the built in GPS was operative, I wondered if the battery life could be extended by using my Globalsat BT-338 GPS receiver instead of the Kaisers' built in GPS receiver. To find out, I first put the internal GPS to the test.
After fully charging my standard 1350mAh battery, I soft reset the phone, set the screen brightness to minimum, disabled phone, Bluetooth and Wifi. I started Memory Map (GPS setting set to COM4) and the stopwatch on SPB Time. When the phone eventually ran out of power and switched off I fully charged it again and ran the same test, with all the same settings except this time I enabled Bluetooth and configured Memory Map to accept GPS input from my bluetooth GPS receiver.
The results were interesting. When utilizing the internal GPS, the phone ran out of power after 5hrs 16mins. When using the external GPS it switched off after 5hrs 32mins.
I must admit I expected the battery to last much longer when using the external GPS receiver. I guess the extra power required to maintain a BT link offset the power saved not running the internal GPS receiver almost exactly.
I really need to get out more.
For what it's worth - I'm just like you! I do the same types of tests and wonderings. I think your findings are actually pretty interesting as since I've had my TYTN I haven't used my holux BT receiver, and have been wondering about power drain.
One thing you may not have considered - you tested with the phone off. With the phone on, the TYTN uses cell-towers for assisted GPS - which may actually cause more battery drain.
That's an interesting observation. I don't really know that much about the inner workings of assisted GPS. I was under the impression that assisted GPS helps the GPS receiver to get a quick fix but I wasn't aware that it continued to "help out" following this. Would assisted GPS still be operative, and draining the battery, if I had a perfectly good GPS signal I wonder? You see, I mainly use GPS whilst I am out walking (hence Memory Map). I always have a good view of the sky so I'm supposing assisted GPS would not be called upon under these conditions?
Hi
I have an application installed on my kaiser that measures car acceleration (0-60 etc) using the inbuilt GPS, the only problem I've got with this is the refresh speed of the GPS is too slow meaning I get less accurate timings.
Does anyone know of a way to decrease the refresh time or do I need to get an external bluetooth GPS?
Thanks in advance.
bump.. anyone?
Hi.
I've used 4-5 GPS apps and I couldn't find option to set a sound (in my case beeping sound) when I gain vertical speed. I wanna use my tilt like a paragliding variometer cause i can't look at the phone and enjoy the view .
So is there app that have that option or could you make one plz.
You can search on youtube to see how variometer works.
A paragliding variometer can have up to three ways of letting you know your vertical speed. Audio sound, digital readout or analog clockface. Some varios are quite basic, like the simple audio-only vario with nothing but an Off/On switch.
Let's have a quick look at each type in turn.
The audio sound indication. If you are going up faster than a pre-set value, you hear a beep-beep tone which increases in pitch the stronger the lift is. Different models have different sounds. Some of them have a sink-alarm as well, warning you with another sound that you are sinking faster than some pre-set value.
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Click to collapse
The TyTN II is missing the hardware required
arminf said:
I've used 4-5 GPS apps and I couldn't find option to set a sound (in my case beeping sound) when I gain vertical speed. I wanna use my tilt like a paragliding variometer
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Click to collapse
Firstly welcome to XDA-DEV arminf! I know exactly what you're after but the HTC TyTN II (and consequently also the Tilt) isn't equipped with enough hardware to be able to do that. There's no Barometric capsule to sense changes in air pressure and no accelerometer so it's no can do using just the phone. Interestingly the Tomtom Navigator version that came with my TyTN II has a setting for which units pressure is to be displayed in (but it has no way of getting that info). Maybe with future products if you let HTC know you'd like this capability included, they may listen (oh, and don't forget to ask for complete driver support while you're at it ). The Touch Pro has an accelerometer but I don't know if it's capable of sensing acceleration in the right plane and whether it can be harnessed using software for this specific purpose.
Surely it should be doable. GPS gives your 3d position, so all software has to do is give compare the positions and times of two subsequent positions to work out the vertical speed.
It should be quite simple for someone who actually has a clue how to program for Windows Mobile
Flying Kiwi said:
Firstly welcome to XDA-DEV arminf! I know exactly what you're after but the HTC TyTN II (and consequently also the Tilt) isn't equipped with enough hardware to be able to do that. There's no Barometric capsule to sense changes in air pressure and no accelerometer so it's no can do using just the phone. Interestingly the Tomtom Navigator version that came with my TyTN II has a setting for which units pressure is to be displayed in (but it has no way of getting that info). Maybe with future products if you let HTC know you'd like this capability included, they may listen (oh, and don't forget to ask for complete driver support while you're at it ). The Touch Pro has an accelerometer but I don't know if it's capable of sensing acceleration in the right plane and whether it can be harnessed using software for this specific purpose.
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Thanks
Wow you are really into variometers , and i know that Tilt doesn't have Barometric capsule, but I was trying to improvise with GPS. So i just need that beeping sound on some GPS app when I'm going up
dancj said:
Surely it should be doable. GPS gives your 3d position, so all software has to do is give compare the positions and times of two subsequent positions to work out the vertical speed.
It should be quite simple for someone who actually has a clue how to program for Windows Mobile
Click to expand...
Click to collapse
Keep in ming though that the GPS inside the TILT uses a perfect sphere model for the planet (AFAIR). So it is possible that you will get a number of false posities/negatives on an extremely uneven terrain...
But yes, in principle it should work.
TyTN II hardware still not up to the task
Whats needed for the intended purpose is something that reacts instantaneously (or very close to it) and with imense accuracy to sense when it's rising or decending and at what rate. If the device is to slow or not accurate enough (and I believe relying solely on the TyTN IIs GPS would present these issues) then you'd end up flying right through the thermal and out the other side or through the ridge lift and into the rotor etc.
When I first bought my bicycle and was looking for a GPS device to go on it (before I bought my TyTN II) I was looking at Garmin pocket GPS units one of which had an aneroid capsule built in. I checked their website and this model is still being sold and this is what it says "For extra-precise climb and descent data, Edge 305 also incorporates a barometric altimeter to pinpoint changes in elevation." Having used the TyTN II's GPS with TomTom Navigator, Google Maps and Microsoft Live Mapping, and seen how it sometimes struggles with basic 2 D mapping, I definitely wouldn't trust it to be up to speed in what the OP wants - irrespective of what software is coupled up to it.
http://www.xperiadepot.com/freedom-keychain-gps-2000/10A95A2869.htm
There are no good description for this product. Does anyone know what they do?
I think this is an ordinary gps modul and description made by someone who does not know there is already a gps receiver built-in in X1.
maybe you use it to help find your keys?
Feezer said:
maybe you use it to help find your keys?
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Right but the description confuses me and it does sound exactly like what jabe said. But I would so buy this if it was key finder.
It just a bluetooth GPS module that fits on a key chain. You don't need it as the X1 already has a built in GPS chip. If you had a smartphone without a GPS chip, then there's be some benefit to it.
Or if you wanted to use GPS stuff on a laptop or something with BT etc.
Suppose your X1 is positioned in your car that way that the GPS reception is bad but you cannot relocate it. You can set it up to receive GPS signals from this external module. The module itself can be put anywhere like near a window or on the car's roof or so.
WTF? Did you even read? "The Freedom Keychain GPS 2000 is the world’s lightest and most compact pocket GPS receiver."
It's an external GPS receiver.
gps is receiving only!
you pick up a signal from several satellites and the device calc your position
this keythingy have gps and bluetooth
bluetooth have a range of 10m so even if it could transmit
it's cords to your phone then you would have to be pretty close to the lost keys
an external gps, my brother has one but of a different brand. his loads really quick and there's no need to wait on finding satellites. i'm not sure how this performs though, but for a keychain it seems promising for other phones without a built-in gps
I actually have one of those. Well, mine is a white Vodafone branded one, but it's the same chip, hardware, box, everything. It's actually still vaguely useful - it's DGPS capable (WAAS/EGNOS), which the X1's GPS chip is not (augmented accuracy within certain systems, WAAS for North America/Canada and out to sea within several hundred miles, EGNOS for Europe etc), and it has apparently far better reception - my X1i couldn't pick up a GPS signal to save its life inside a BA Boeing 777 flight. The bluetooth'd external reciever picked up and held a strong signal for the entire 3500 mile flight at 40k ft. And inside a plane fuselage, that's got to be borderline faraday cage.
Which GPS option would consume less battery power, the interal GPS or an external Bluetooth GPS unit?
TIA
WT
Thats a good question, I know a few people have said they run external receivers.
If they don't reply I would suggest you do a test and let us know.
Same here good ? I'd guess that an external would use less as it's only running BT "external units self powered" and the software compared to GPS & software.
ah but really, which antenna uses more power? the BT or the GPS?
If you are using GPS while driving, then you can use car charger to charge. But if you want to use GPS while hiking etc, then just keep a couple (or even more) extra batteries. These days you can buy extra batteries very cheap (as low as $5).
More over there are programs which can save battery by connecting to GPS every 1 minute, 2 minutes, 5 minutes etc (e.g gpsVP).
In short, you can do much better without external GPS.
So then maybe you can do even better if you do what you're suggesting and use external bt gps. hmmm
ChumleyEX said:
So then maybe you can do even better if you do what you're suggesting and use external bt gps. hmmm
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But then you have to carry external GPS, its charger, may be extra battery for external GPS. All that can be avoided by carrying extra batteries for Kaiser.
Is that what the OP is asking?
Thank you gentle for your input. The real test will be simply try it I suppose.
What I have found out is that the BT-359 has superior GPS accuracy over my Kaiser and that I like. Thanks again
WT
Working Tools said:
Thank you gentle for your input. The real test will be simply try it I suppose.
What I have found out is that the BT-359 has superior GPS accuracy over my Kaiser and that I like. Thanks again
WT
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Click to collapse
Yeah i used to use a Magician with extrenal GPS and it fixed so much faster than the Kaiser on board does
I've found the power consumption using the same backlight, same application, etc, but using internal vs Bluetooth GPS was around 100mAh. You do the math.
And the Kaiser's GPS blows.. Doesn't turn off sometimes (continuing to use battery), doesn't work well at all for low speeds (walking), not very sensitive, can be extremely slow to start, and sucks battery.
Thanks khaytsus, what current drain were you able to measure while using the internal GPS unit?
As you can tell I am quite the noob when it comes to the internal workings of the Kaiser but I am learning much from this forum. Thank you everyone for your offering of knowledge!
WT
Pros and Cons of external GPS.
Pros:
Less drain on phone battery.
GPS receiver can be placed where it gets best reception (such as on top of the dash).
Cons:
Another device to haul around.
Another battery to charge.
The hassle of pairing/connecting.
Can't use BT GPS and A2DP simultaneously.
Is it even possible to switch between internal and external GPS on the Kaiser without a hard reset?
Wilhelm said:
Pros and Cons of external GPS.
Pros:
Less drain on phone battery.
GPS receiver can be placed where it gets best reception (such as on top of the dash).
Cons:
Another device to haul around.
Another battery to charge.
The hassle of pairing/connecting.
Can't use BT GPS and A2DP simultaneously.
Is it even possible to switch between internal and external GPS on the Kaiser without a hard reset?
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Click to collapse
what does this have to do with the OP?
Wilhelm said:
Pros and Cons of external GPS.
Pros:
Less drain on phone battery.
GPS receiver can be placed where it gets best reception (such as on top of the dash).
Cons:
Another device to haul around.
Another battery to charge.
The hassle of pairing/connecting.
Can't use BT GPS and A2DP simultaneously.
Is it even possible to switch between internal and external GPS on the Kaiser without a hard reset?
Click to expand...
Click to collapse
Switching? It's just a different com port. Now, if you're doing registry tweaking to route the external GPS through com4 so that 'any' program can use it, even those without the ability to modify the com port, yes you'd need a soft reset. Otherwise, of course not.
Pairing and connecting are a zero issue. You do it once.
I thought changing the hardware port on the GPS settings meant you couldn't return to the internal GPS without a hard reset.
Eh that post was just too mean. SOrry
Wilhelm said:
I thought changing the hardware port on the GPS settings meant you couldn't return to the internal GPS without a hard reset.
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Click to collapse
Nope, there's a GPS switcher app out there too, and private builds of CamerAwareBuddy supports switching too.
Also, I don't know about AD2P, but I can use BT GPS and BT headset simultaneously.
Well, from my own experience (Tilt is broken now but I used to use Igo My Way 8.1) the GPS has a function that saves battery...
How does it handle it?
Simple: if you for example have to drive straight forward for 5 kilometers the screen will turn black (standy) and won't turn on (unless pressed) but at the moment when you're getting new directions (Turn left, right, bla bla)
I used to have an external GPS only for my SE M600i but that's a different story