#include <OneWire.h>
#include <DallasTemperature.h>


const int TEMP_THRESHOLD_UPPER = 25; 
const int TEMP_THRESHOLD_LOWER = 20;
const int SENSOR_PIN    = 9; 
const int MOTION_SENSOR_PIN = 2;  
const int BUZZER_PIN        = 3;   
int motionStateCurrent      = LOW;
int motionStatePrevious     = LOW; 
OneWire oneWire(SENSOR_PIN);       
DallasTemperature sensors(&oneWire); 
float temperature;

void setup() {
  Serial.begin(9600); 
  sensors.begin();  

  pinMode(MOTION_SENSOR_PIN, INPUT); 
  pinMode(BUZZER_PIN, OUTPUT);       
}

void loop() {
  
  sensors.requestTemperatures();          
  temperature = sensors.getTempCByIndex(0); 

  if(temperature > TEMP_THRESHOLD_UPPER){
    Serial.println("temp : it is hot");
    
  } else if(temperature < TEMP_THRESHOLD_LOWER){
    Serial.println(" temp: it is cold");
  
  }

  delay(500);

          
  motionStateCurrent  = digitalRead(MOTION_SENSOR_PIN); 

  if ( motionStateCurrent == HIGH) {
    Serial.println("Motion detected!");
    digitalWrite(BUZZER_PIN, HIGH);
  }
  else
   { 
    Serial.println("Motion stopped!");
    digitalWrite(BUZZER_PIN, LOW); 
   }
}