   }
   //TX
   if ( txFlag ) {
+    Serial.print("TX:");digitalClockDisplay( now() );
     Serial1.print( "TX:" ); // Identifies transmitted packet for log.
     sendData();
     numb++;

  char c;
  if ( Serial1.available() ) {
    c = Serial1.read();
    if ( !sentenceRdy ) {
      if ( c == 36 ) { //36 is '$', start of GPS statement - KN
        sentenceIndex = 0;

//const int pin2 = 2;

void setup(){
  Serial.begin(9600);
  Serial1.begin(9600);  
  Serial2.begin(9600); 
  setSyncProvider( getTeensy3Time );
