Parses NMEA $GPGLL command, with minimal footprint, or processing requirement. Simply pass the NMEA communication to it char by char, then query for the result at any time. Also parset the $GPVTG command.

Can get:

• Is there currently a valid GPS coordinate?
• Last got coordinates (Lat, Lon)
• When was the coordinates got? (last valid time)
• What is my speed in Kmph?