/*
 * Created by ArduinoGetStarted.com
 *
 * This example code is in the public domain
 *
 * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-lm35-temperature-sensor
 */

#define ADC_VREF_mV    5000.0 // in millivolt
#define ADC_RESOLUTION 1024.0
#define PIN_LM35       A0

void setup() {
  Serial.begin(9600);
pinMode(A0, INPUT);
pinMode(4,OUTPUT );
}

void loop() {
  // get the ADC value from the temperature sensor
  int x = analogRead(A0);
  // convert the voltage to the temperature in Celsius
  float temp = (x*4.88) / 10;
if(temp>30)
digitalWrite(4, HIGH);
else
digitalWrite(4,LOW);
  // print the temperature in the Serial Monitor:
  Serial.print("Temperature: ");
  Serial.print(temp);   // print the temperature in Celsius

  delay(2000);
}