I read the post you made some wile ago and UDR0 in a register is forgotten since I completed my education in 1984. Thank you in advance for your help.
While compiling parsing.ino I have the error: “UDR0’ was not declared in this scope.
Section of code lines 89 to 97 :
// Interrupt is called once a millisecond, looks for any new GPS data, and stores it
SIGNAL(TIMER0_COMPA_vect) {
char c = GPS.read();
// if you want to debug, this is a good time to do it!
if (GPSECHO)
if (c) UDR0 = c;
// writing direct to UDR0 is much much faster than Serial.print
// but only one character can be written at a time.
}

