//include libraries
#include "DHT.h"

#define DHTPIN 2     // The pin number which is the DHT22 Sensor was Connected
#define DHTTYPE DHT22   // Type of the DHT Sensor
#define TEMPERATURE_THRESHOLD 45 // Temperature threshold
#define BUZZER_PIN 3 // The pin number which is the Buzzer was connected
#define PUSH_BUTTON_PIN 4 // The pin number which is the PushButton was connected


DHT dht(DHTPIN, DHTTYPE);

float temperature; // Variable for assigning the temperature readings
bool isAlarmTurnedOn = false; // To indicate the alarm is turned On or Off
int isPushButtonPressed = 0; // To store the PushButton state

void setup() {
  Serial.begin(9600);
  pinMode(PUSH_BUTTON_PIN, INPUT);

  dht.begin();
}

void loop() {
  temperature = dht.readTemperature(); //Read the temperature 
 
  if (temperature > TEMPERATURE_THRESHOLD && !isAlarmTurnedOn) { // check whether the temperature exceeds the thresholed value

     tone(BUZZER_PIN,450); // set the alarm
      isAlarmTurnedOn = true; //  indicate that the alarm is turned on
  }
 
 isPushButtonPressed = digitalRead(PUSH_BUTTON_PIN); // Reading the Button State

 if(isPushButtonPressed == 1 && isAlarmTurnedOn){ // reset the alarm
    noTone(BUZZER_PIN); // stop the buzzer sound
    isAlarmTurnedOn = false; // indicate that the alarm is turned off


 }


}