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　　According to the condition, the GPS module Sirf Star III accepts data at the output location, usually $ GPRMC streamlined data format data, including latitude, longitude purpose, speed (knot), movement direction angle, year, month, time, divide , Seconds, milliseconds, positioning data are effective or invalid, and other important information. The format of the sentence is as follows:

　　$ GPRMC ,,,,,,,,,,,,,*, HH

　　You only need to know the location information, so you can read the only one, you can apply it.

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

　　<2>: Work represents the country. "Show available data," V "means accepting the alarm, no available data.

　　<3>: Represents latitude data. "Sub -level format. Division."

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

　　<5>: Represents longitude data. Format and LD

　　Status; degree of minutes. sub-sub-sub-sub. "

　　<6>: Represents longitude hemisphere, "e" or "

　　Software reads latitude and longitude data. The current position stops analysis to determine that the user's current location is established in the region. The method is to calculate the latitude, longitude and latitude, and longitude of the user based on the user's settings to determine the active maintenance of the current object. Discrimination on the basis of the result, set the corresponding logo

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The GPS implementation plan has three phases