KY-006 Sensor Module

//Example Code for KY-006

int buzzer = 8 ;// setting controls the digital IO foot buzzer
void setup() {
  pinMode(buzzer, OUTPUT) ;// set the digital IO pin mode, OUTPUT out of Wen
}
void loop() {
  unsigned char i, j ;// define variables
  while (1)   {
    for (i = 0; i <80; i++) { // Wen a frequency sound
      digitalWrite(buzzer, HIGH) ;// send voice
      delay(1) ;// Delay 1ms
      digitalWrite(buzzer, LOW) ;// do not send voice
      delay(1) ;// delay ms
    }
    for (i = 0; i <100; i++) { // Wen Qie out another frequency sound
      digitalWrite(buzzer, HIGH) ;// send voice
      delay(2) ;// delay 2ms
      digitalWrite(buzzer, LOW) ;// do not send voice
      delay(2) ;// delay 2ms
    }
  }
}