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gpspassion
93389 Posts |
 Posted - 20 janv. 2010 : 14:27:05
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Let's clarify that you will need a "Jailbroken" (JB) phone for this. This is obviously not endorsed by Apple but AFAIK they have not gone after sites (Cydia, Rock) that offer applications for JB phones and even less so after customers who have JB'd their phone.
Now that this is out of the way, let's discuss the interesting RoqyGPS application that lets you use a Bluetooth GPS on an iPod Touch or an iPhone (2G/3G/3Gs). Previous versions were a bit flaky (GPS not found), but the latest v0.9.6-1 version works fine on my 3Gs.
RoqyGPS costs €8 which might seem expsensive for a an iPhone application but for the non-GPS enabled iPod Touch and iPhone 2G it's a cheap way to get access to GPS, especially if you have an old Bluetooth GPS available.
Even for the 3G and 3Gs it's an interesting solution because :
- it will significantly extend the battery life (Bluetooth uses much less power than the GPS chip)
- will generally offer better accuracy as external GPS receivers can afford to use a large patch antenna (the iPhone only has a "wire" antenna) and you can place the receiver in a position where it gets a good view of the sky, like the outside pocket of a backpack
- Another advantage is that it will work even if your iPhone is in airplane mode, unlike the built-in receiver.
Questions, comments ? |
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peteostro
10 Posts |
Posted - 20 mars 2010 : 18:02:38
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Does this work with the iPhone 3GS?
If so does the built in compass still work while this is in use?
Does it work while the iPhone is locked (asleep?)
What external GPS do yous guys recommend? I go hiking allot and imk pretty frustrated with the iPhone's built in GPS (and battery drain) and would love to try this.
Need something with good battery life, Rechargeable also with support regular battery if possible and preferably small.
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Edited by - peteostro on 20 mars 2010 18:07:30 |
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un tout petit Breton
3 Posts |
Posted - 02 avr. 2010 : 14:37:42
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Hello,
A little question:
I have an iPhone 3Gs and the TomTom car kit.
I would like to try to use a Bluetooth GPS Receiver with my iPhone (instead of the TomTom car kit) thanks to RoqyBluetooth: http://www.roqy-bluetooth.net/wp/
I found a Bluetooth GPS Receiver, the transystem i-Blue 737A +:
http://www.transystem.com.tw/products/index_detail.php?mcat_no=2&cat_no=31&pno=47&ver=en
It seems to be interesting because of the following characteristics;
- Sensibility: -165db
- Channels: 66
- Position accurancy: 3m
- Operation time: 32 hours
The chipset is a Mediatek MT3329.
Here is my question: are these characteristics better or worth than that of the TomTom car kit? Is the Mediatek MT3329 a good chipset (in comparison with the chipset SiRFstarIII of the TomTom car kit)?
Sorry, but I am far to be an expert in GPS. I hope that you can help me.
Thank you. |
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unnefer
Australia
9 Posts |
Posted - 06 avr. 2010 : 02:03:57
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The bluetooth GPS unit you are considering is no better then the TomTom carphone kit, in that it is also only a 1Mhz GPS chip and so is no more accurate then the TomTom carkit.
To really benefit from rogygps, you should use a bluetooth GPSD that uses the better and more accurate 5Mhz GPS chip. Go through the RogyGPS supported gps hardware list here and find a 5Mhz device that is affordable for you.
The QStarz BT-818x is arguably the best 5Mhz GPS for the money (<$70 USD) - it has much better accuracy and signal sensitivity then both the iPhone's built-in GPS and the TomTom carkit :)
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gpspassion
93389 Posts |
Posted - 06 avr. 2010 : 02:50:04
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You probably mean Hz, as in positions per second ;-) Yes in theory the more the samples the better and that was analyzed in detail in this article : Using GPS systems with >1Hz refresh but there isn't much software that can take advantage of it, actually I'm only aware of ChronoGPS on the Windows Mobile platform and soon on Android apparently, nothing on the iPhone so far.
As for the original question, the TomTom Car Kit uses the latest generation SiRFstarIII chipset and the 737A+ uses the MTK v2 chipset so performance is going to be close as seen on the performance testing articles on the portal. The obvisou advantage of a Bluetooth GPS is that you can user it outside your car and save on the precious battery life of your iPhone. |
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gpspassion
93389 Posts |
Posted - 20 juin 2010 : 12:08:33
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| Good news, RoqyGPS also works on the iPad, for those who don't need 3G (the 3G models add GPS as it is located on the same chip), you can save some cash if you alread own a Bluetooth GPS receiver ! |
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[TIP] Bluetooth GPS on an iPhone/iPad with RoqyGPS
