#include<SoftwareSerial.h>
const int Tempsensor = A0;//connect output pin of lm35 to A0 oin of arduino
int bluetoothTx = 10;//connect to tx of bluetooth to 10th pin
int bluetoothRx = 11;//connect to rx of bluetooth to 11th pin
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup(){
  pinMode(Tempsensor, INPUT);
  pinMode(3, OUTPUT);//blue pin of rgb led
  pinMode(4, OUTPUT);//green pin of rgb led
  pinMode(5, OUTPUT);//red pin of rgb led
  Serial.begin(9600);//serial coummunication begin
  bluetooth.begin(9600);//bluetooth communication begin
}

void loop(){
  float temp = analogRead(Tempsensor);//read temperature sensor voltage
  temp = temp * 0.48828125;//(5*1000)/1024 = 0.48828125 from sensor data sheet
  Serial.println("");//
  Serial.println(temp);//watch the current temperature in serial monitor
  bluetooth.println("");//
  bluetooth.println(temp);//send temperature to bluetooth device
  delay(100);
  if (temp <=30){//if temperature is below 30 turn on blue light
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
  }
  else if (temp >30 && temp <=34){//if temp is above 30 and below 34 turn on green light
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
  }
  else if (temp >36){//if temperature is above 36 turn on red light
    digitalWrite(3, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(5, LOW);
  }
}