MicroNMEA

MicroNMEA parse a subset of NMEA sentences, which can originate from either GPS or GNSS receivers.
Only $GPGGA (and its GNSS versions $GNGGA, $GLGGA, and $GAGGA) and $GPRMC (and its GNSS versions $GNRMC, $GLRMC, and $GARMC). From these two NMEA sentences MicroNMEA can output date, time, latitude, longitude, altitude, number of satellites used, horizontal dilution of precision (HDOP), course and speed. When other NMEA sentences are detected they can be passed to an optional callback function for decoding or logging. Checksum failures can be indicated with another optional callback function.

NMEA sentences can easily be sent to an output stream with the sendSentence() function which computes and appends the checksum, as well as the correct <CR><LF> terminators.

Added :
Handle UTC time with zero up to 6 decimals seconds ( microseconds ), with or without decimal point.
Get Milli and Set Milli seconds.
Get Micro and Set Micro seconds.
IsValid = ( IsFixValid OR IsDataValid )