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Neo 1973 |
sold out
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See Here For information about the GPS in the Neo FreeRunner
The smartphones contain an integrated GPS receiver. The devices used are marketed as Assisted GPS ('AGPS'). Performance requirements are defined in GSM/GPRS 3GPP TS 25.171, CDMA 3GPP2 C.S0036-0. There is some discussion available as to what significance that "A" might have.
The external antenna for the GPS uses an MMCX connector. More information about external antennas on the GPS antennas page. The connector for the internal GPS antenna also uses an MMCX connector. The external connector is located on the side of Freerunner.
The Neo 1973 used the Hmamerhead.
The Neo 1973 uses a separate userland driver to access the Hammerhead GPS. See this article for more information on this driver: gllin
The gllin driver itself is available here: http://3rdparty.downloads.openmoko.org/gllin/ It can be run from a command line. It outputs the NMEA data stream from the Hammerhead chip on a pseudotty device, so that it can be read as if the data were coming in on a serial port.
Here is email from Michael Shiloh about it. http://lists.openmoko.org/pipermail/community/2007-November/011916.html
There was an effort to write a Free Software program that could be used instead of this binary-only program, but this stalled after the decision to change GPS chips in GTA02. The Iphone 3G uses the same GPS chip. It's not inconceivable that this might lead to further effort.
See Hammerhead/Protocol for details and the latest status.
Some scripts for those with the binary are on Manually_using_GPS
Please see the important information on gllin!
Aside from accessing the GPS data in applications programs running directly on the smartphone, you can also access the GPS data stream from another gadget such as a laptop.
Here are a couple ways to do that. You can use a network connection to pull data from the gpsd daemon, or you can make the smartphone appear to be a generic Bluetooth-connected GPS receiver.
Using gpsd requires a program that understands its protocol, such as GPSdrive. Using Bluetooth would allow using just about any program that understands the NMEA protocol.
This procedure depends upon being able to set up a network connection between your Neo and your laptop. The connection can be over either WiFi or USB cable.
First be sure you have gllin and gpsd installed.
Tested with RoadNav. Works great!
If you have an unlimited GPRS data package you could make your gpsd service accessible over the Internet. This opens up many possibilities. For example, you could implemented AVL (Automatic Vehicle Location) by having a web server somewhere query your gpsd server for your position and write it to a KML file which would then display your location on a Google map.
Here is how to make your smartphone appear to be a Bluetooth GPS.