const byte resetOpenLog = 12; // pin 12 sur GRN du module Openlog

//Setup up the serial1 (Leonardo et Micro), reset OpenLog so we know what state it's in, and waits
//for OpenLog to come online and report '< ' that it is ready to receive characters to record

void setupOpenLog(void) {
  Serial1.begin(9600);
  //Reset OpenLog
  digitalWrite(resetOpenLog, LOW);
  delay(100);
  digitalWrite(resetOpenLog, HIGH);

  //Wait for OpenLog to respond with '< ' to indicate it is alive and recording to a file
  // boucle sans fin si erreur !
  while(1) {
   if(Serial1.available())
   if(Serial1.read() == '< ') break;
   }
} // endfunc