RTC-now-alarme-10seg

#include <Wire.h>
#include <DS3231.h>
#define GND 2
#define POSITIVO 5

RTClib myRTC;

void setup () {
  pinMode(GND, OUTPUT);
  pinMode(POSITIVO, OUTPUT);

  digitalWrite(GND, LOW);
  digitalWrite(POSITIVO, LOW);

  Wire.begin();
}

void loop () {

    DateTime now = myRTC.now();

    // Alarma do segundo "0" ao segundo "9" (10 segundos)
    if(now.hour()==15 && now.minute()==05 && now.second()>=0 && now.second()<10){
      digitalWrite(POSITIVO, HIGH);
      delay(200);
      digitalWrite(POSITIVO, LOW);
      delay(200);
    }
}