Use library to only parse sentence about nmea0183 HOT 1 OPEN

If you have message in char *buf
Construct NMEA0183 message and parse it
tNMEA0183Msg NMEA0183Msg;

if ( NMEA0183Msg.SetMessage(buf) ) {
// Here you need to select parser according message.
// You can e.g., make arrays of message codes/parser functions or simply use if for testing
if ( strcmp(NMEA0183Msg.IsMessageCode("GGA") ) {
NMEA0183ParseGGA_nc(NMEA0183Msg,...);
} else ...
}

from nmea0183.