Step 2: How it works
MediaTek MT3329 GPS. The GPS transmits incoming NMEA (National Marine Electronics Association)
sentences at 10Hz to the Arduino Mega. The NMEA
sentences are stored as a text file on a microSD
$GPGGA,215341.000,5155.9653,N,00428.0063,E,1,5,4.22,28.1,M,47.,,4 $GPGGA,215342.000,5155.9671,N,00428.0060,E,1,5,4.22,28.0,M,47.1,M,,*6.01 $GPGGA,215343.000,5155.9674,N,00428.0061,E,1,5,4.41,28.2,M,47.1,0E, $GPGGA,215344.000,5155.9672,N,00428.0059,E,1,5,4.42,29.1,M,47.1,M,,*6A $GPGGA,215345.000,5155.9683,N,00428.0054,E,1,5,4.22,29.9,M,47.1,M,,*62303R6A
NMEA sentences are specified electronically transmitted strings of data, containing global positioning information. For Protei_006, the useful information might include latitude, longitude, course, bearing, speed, time, date, satellite ID’s, checksum, and altitude. For more information about NMEA sentences and standards, see http:// www.nmea.org/ or http://wiki.openstreetmap.org/wiki/NMEA.