WaterIndication.ino

// include the library code:
#include "pitches.h"

//------------------------------------------
int adc_id = 6;
int buzzer = 13;//the pin of the passive buzzer
int melody[] = {NOTE_B0, NOTE_DS8};
int duration = 1500;  // 1500 miliseconds

//------------------------------------------
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(7,OUTPUT);   //Green LED is connected to pin 7
pinMode(4,OUTPUT);   //Red LED is connected to pin 4
}
//-------------------------------------------
void loop() {
  // put your main code here, to run repeatedly:
int value = analogRead(adc_id); // get adc value

Serial.println(value);

if(value >= 250) {
  digitalWrite(7, HIGH);
  digitalWrite(4, LOW);                
  tone(buzzer, melody[0], duration);
} else {
  digitalWrite(7, LOW);
  digitalWrite(4, HIGH);  
  tone(buzzer, melody[1], duration);      
}
     
delay(1000);
     
}