[gps-talkusers] Re: GPS receivers
- From: Jacob Schmude <j.schmude@xxxxxxxxx>
- To: gps-talkusers@xxxxxxxxxxxxx
- Date: Thu, 28 Feb 2013 06:34:49 -0800
Hi Mike
I can answer that. iOS compatible Bluetooth gps receivers use an Apple-specific
protocol that is completely separate from the serial-based protocol used by
other receivers. This protocol is created and licensed by Apple and, from what
I've found out from Bad-Elf, actually comes on a proprietary chip that is used
when constructing these receivers. Those who make the receivers know how to
communicate with this protocol chip (a firmware API) but don't actually
implement the protocol themselves. This protocol is iOS-specific and therefore
does not work with any other devices. If you want to use a standard Bluetooth
receiver with your iPhone that does not implement this protocol, you'll need to
jailbreak and install an app that performs the same function as Android's
Bluetooth GPS app, i.e. passes the information from the external receiver into
CoreLocation which then obscures the data from the internal receiver. However,
none of these apps are free and paying for an app that only runs on a
jailbroken device is a bad investment, which is why I purchased a Bad-Elf Pro
Bluetooth receiver. It has the same MTK2 chipset as the iBlue 737A+ and 747 and
an excellent antenna giving me the same accuracy I enjoyed with my iBlue, but
has the Apple protocol chip.
On Feb 27, 2013, at 6:44 PM, Mike Arrigo <n0oxy@xxxxxxxxxxx> wrote:
> I wonder what makes a receiver different so it works with an IOS device. I
> have several bluetooth receivers here, and none of them work with my iphone,
> but they work just fine with my android phones.
> On Feb 27, 2013, at 5:11 PM, "Michael May" <mikemay@xxxxxxxxxxxxxxxx> wrote:
>
>> Les,
>>
>> More sensitive receivers become important among buildings and canyons. In
>> the open, it doesn't much matter what you have.
>>
>> The acquisition time will be impacted the same way.
>>
>> Mike
>>
>>
>> -----Original Message-----
>> From: gps-talkusers-bounce@xxxxxxxxxxxxx
>> [mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Les Kriegler
>> Sent: Wednesday, February 27, 2013 8:55 AM
>> To: gps-talkusers@xxxxxxxxxxxxx
>> Subject: [gps-talkusers] Re: GPS receivers
>>
>> Hi Mike,
>>
>> Thanks for the detailed explanation about GPS receivers. If one travels in
>> an urban area, will the iPhone receiver perform comparably to an external
>> receiver? Also, can you comment on acquisition time of these receivers
>> versus the iPhone's built-in receiver? Thanks.
>>
>> Les
>>
>> -----Original Message-----
>> From: gps-talkusers-bounce@xxxxxxxxxxxxx
>> [mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Michael May
>> Sent: Wednesday, February 27, 2013 9:43 AM
>> To: gps-talkusers@xxxxxxxxxxxxx
>> Subject: [gps-talkusers] GPS receivers
>>
>> Great to see all the conversation. Do please change up the subject line so
>> we can track the different threads.
>>
>> We have been testing the Garmin Glo GPS receiver. It is one approved by
>> Apple for the iPhone. Because it receives at a rate of 10 times per second
>> versus the once per second of other receivers, it won't easily work with our
>> notetakers. Chris did get it to work but it wasn't simple.
>>
>> It will definitely be more sensitive and acquire in more places than the
>> built-in iPhone GPS. Remember again that when the iPhone shows a position,
>> it can be quite inaccurate if in fact it has no GPS signal and is just using
>> the cell signals.
>>
>> GPS receivers have a sensitivity rating, the lower the DBM, the more
>> sensitive. The better receivers like the iBlue and QSTARZ have been in the
>> minus 150 to 160 range. The Garmin Glo is in the minus 180 range.
>>
>> It sells for around $99. Here is one more benefit as copied from the Garmin
>> website.
>> GLO can receive position information from both the GPS and GLONASS satellite
>> constellations, allowing it to connect to up to 24 more satellites than
>> devices that rely on GPS alone. This allows GLO to lock on to satellites
>> approximately 20 percent faster and remain connected even at high speed.
>> What's more, GLO updates its position information at 10 times per second -
>> that's up to 10 times more often than the GPS receivers in many mobile
>> devices.
>>
>> Michael May, CEO Sendero Group
>> Developers of accessible GPS and distributors of technology for the blind
>>
>> Office Phone: 888-757-6810, extension 101
>> Email: MikeMay@xxxxxxxxxxxxxxxx
>> Sendero web: http://www.senderogroup.com General GPS Web:
>> http://www.AccessibleGPS.com Mike May Personal:
>> http://www.CrashingThrough.com
>>
>> Sendero Address: 1857 Glenmark Way, Roseville, CA 95747
>>
>>
>>
>> To change your email settings (unsubscribe, digest only, or vacation mode):
>> http://senderogroup.com/social_media/email.htm
>>
>> Additionally, to unsubscribe send an email to
>> gps-talkusers-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject.
>>
>> To change your email settings (unsubscribe, digest only, or vacation mode):
>> http://senderogroup.com/social_media/email.htm
>>
>> Additionally, to unsubscribe send an email to
>> gps-talkusers-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject.
>>
>>
>> To change your email settings (unsubscribe, digest only, or vacation mode):
>> http://senderogroup.com/social_media/email.htm
>>
>> Additionally, to unsubscribe send an email to
>> gps-talkusers-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject.
>
> To change your email settings (unsubscribe, digest only, or vacation mode):
> http://senderogroup.com/social_media/email.htm
>
> Additionally, to unsubscribe send an email to
> gps-talkusers-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject.
To change your email settings (unsubscribe, digest only, or vacation mode):
http://senderogroup.com/social_media/email.htm
Additionally, to unsubscribe send an email to
gps-talkusers-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject.
Other related posts:
