GPS installation points

　　1. In order to avoid damage by thieves, the location of the equipment should be as concealed as possible;

　　2. Avoid putting it together with the emission source, such as wireless reversing radar, anti-theft device, and other in-vehicle communication equipment;

　　3. It can be fixed with a cable tie, or pasted with a wide sponge strong double-sided tape;

　　4. There are GSM antennas and GPS antennas in the device, and it should be installed with the front facing up (to the sky).

　　data reception

　　Under the implied conditions, the GPS module SiRFStarIII accepts the data of every two output positions, usually the data in the $GPRMC reduced data format, including latitude, longitude, speed (knot), movement direction angle, year, month, hour, minute, second , milliseconds, positioning 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 only, can be practically applied.

　　<1>: Local time represents UTC. Format "When every minute, hour, minute and second 2.

　　<2>: Work represents the country. "" shows available data, "V" means accept alert, no data available.

　　<3>: Represents latitude data. "The format of the sub-level. Points points."

　　<4>: "N" or "S" represented by the latitude hemisphere.

　　<5>: represents longitude data. Format and LD

　　Status quo; degree minutes. sub-sub-sub-sub.”

　　<6>: represents the longitude hemisphere, which is "E" or "

　　The software reads the latitude and longitude data to obtain the user's location for analysis, and determines the user's specific location to establish peace in the area. The method is to determine the latitude and longitude of the center and the latitude and longitude of the center based on the user's settings and calculate that the activity maintaining the current object can exceed the predetermined radius of the peaceful activity. Based on the results of discrimination, set the corresponding flags.

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