int lm35pin = A2;  // Pin for LM35 sensor
int redLedPin = 6;
int blueLedPin = 5;
float roomTemperature = 27.0;
float tempC;
int temp_adc_val;
void setup() {
 analogReference(INTERNAL);
 Serial.begin(9600);
 pinMode(redLedPin, OUTPUT);
 pinMode(blueLedPin, OUTPUT);
}
void loop() {
 temp_adc_val = analogRead(lm35pin);
 tempC = temp_adc_val / 9.31;
 Serial.print("Temperature = ");
 Serial.print(tempC);
 Serial.println(" *C");

 if (tempC < roomTemperature) {
 digitalWrite(redLedPin, HIGH);
 digitalWrite(blueLedPin, LOW);
 } else {
 digitalWrite(redLedPin, LOW);
 digitalWrite(blueLedPin, HIGH);
 }
 delay(1000);
}