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Libraries \ NMEA

Reference for Wiring version 1.0 Build 0100+ If you have a previous version, use the reference included with your software. If see any errors or have any comments, let us know.

Class | NMEA
Name |

### decode()

Examples |
    #include <nmea.h>

    // create a GPS data connection to GPRMC sentence type
    NMEA gps(GPRMC);

    void setup() {
      Serial1.begin(4800);
      pinMode(0, OUTPUT);
    }

    void loop() {
      if (Serial1.available() > 0 ) {
        // read incoming character from GPS
        char c = Serial1.read();

        // check if the character completes a valid GPS sentence
        if (gps.decode(c)) {
          // check if GPS positioning was active
          if (gps.gprmc_status() == 'A') {
            // check if you are in Colorado, USA
            boolean inColorado = (gps.gprmc_latitude() > 37.0)
                              && (gps.gprmc_latitude() < 41.0)
                              && (gps.gprmc_longitude() < -102.05)
                              && (gps.gprmc_longitude() > -109.05);

            // set led accordingly
            if (inColorado) {
              digitalWrite(0, HIGH);
            } else {
              digitalWrite(0, LOW);
            }
          }
        }
      }
    }
Description | Decodes character received from the GPS. Returns 1 when the character completes a sentence, returns 0 otherwise. If the connection type is NMEA(ALL), every complete sentence is detected. If the connection type is NMEA(GPRMC), only sentences of type GPRMC are detected.
Syntax |
    decode(c)
Parameters |

c | char

Returns | int
Usage | Application

Updated on July 07, 2011 11:11:09pm PDT