#include <DS3231.h>  // http://www.rinkydinkelectronics.com/library.php?id=73
DS3231  rtc(SDA, SCL); // Initiate the DS3231 Real Time Clock module using the I2C interface
//-----------------------------------------------------------------
void setup() {
  Serial.begin(9600);

  rtc.begin();
}
//-----------------------------------------------------------------
void loop() {

 }