Libelium Waspmote 3G Plus GPS, Сетевое руководство, Страница: 51 / 77

-51- v4.9
GPS
To get the GPS data in stand alone and MS-based mode use the function
getGPSinfo()
. The GPS data from MS_assisted mode
are stored in
buffer_3G
.
Example of use:
{
// Gets GPS data and shows it:
_3G.getGPSinfo();
USB.println(_3G.buffer_3G);
}
These functions returns:
• ‘1’ on success
• ‘0’ if error
• ‘-2’ if info it’s not available
10.4. Stopping the GPS
To stop the GPS use the function
stopGPS()
;
Example of use:
{
// Stops GPS:
_3G.stopGPS();
}
These functions returns:
• ‘1’ on success
• ‘0’ if error
10.5. Managing GPS data
The GPS data given by the 3G/GPRS module has 2 formats. The function
getGPSinfo()
(stand-alone and MS-based) returns
the GPS info in specific variables with this units:
Variable Format Example
latitude ±ddmm.=north and -= south
d: degree; m: minute 4140.831527
longitude ±dddmm.=east and -= west
d: degree; m: minute -00053.173495
date ddmmyy
d: day; m: month; y: year 020812
UTC_time hhmmss.s
h: hour; m: minute; s: seconds 083418.0
altitude meters 257.00
speedOG Knots (1knot = 1852m/s) 0
course degrees 0
Figure: Format and example of GPS variables in stand- alone and MS-based modes