The GPS module SiRFStarIII receives every two output position data, usually
$GPRMC data format data, including latitude, longitude for purpose, speed
(knots), direction of motion Angle, year, month, hour, minute, second,
millisecond, location data is valid or invalid, and other important information.
The statement format is as follows:
$GPRMC，，，，，，，，，，，，*, HH
Only need to know the location information, so in reading unique, can be
practically applied.
<1>: Local time represents UTC. Format "WHEN per minute, HOUR, MINUTE
and second 2.
<2>: The job represents the country. "Show available data, "V" means
accept alert, no data available.
<3>: represents latitude data. The format of the child. Point by
point."
<4>: "N" or "S" represented by the latitudinal hemisphere.
<5>: represents longitude data. The format and LD
The status quo. Degree of minutes. sub-sub-sub-sub."
<6>: represents the longitude hemisphere, as "E" or"
The software reads latitude and longitude data to obtain the user's
location to stop the analysis and determine the user's specific location in the
area to establish peace. The method is to determine the latitude and longitude
of the center based on the user's Settings and calculate the latitude and
longitude of the activity to maintain the current object beyond the predefined
radius of the peace activity. The results are based on discrimination and the
corresponding signs are set.
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