#include <Servo.h>     //uses servo and DHT libraries 
#include <DHT.h>

// DHT sensor setup
#define DHTPIN 7
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);    //intialises DHT object with sensor type and pins 

// Creates a servo motor to control the servo angle
Servo servo;  

void setup() {
  servo.attach(5);           // Attach servo to pin 5
  dht.begin();               // Start the DHT sensor
  Serial.begin(400);     //Starts serial conversation 
}

void loop() {
  // Read the temperature from the DHT sensor
  float temp = dht.readTemperature();

  // Check if the reading is valid
  if (isnan(temp)) {
  
    delay(2000); // Wait before trying again
    return;
  }
  
  int servoAngle; // Variable to hold the servo angle

  // Map the temperature range (-40°C to +80°C) to the servo angle range (0° to 180°)
  servoAngle = map(constrain(temp, -40, 80), -40, 80, 0, 180);

  // Move the servo to the corresponding angle
  servo.write(servoAngle);

  //Prints out the info about temp and corresponding angle
  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.print("℃ --> Angle: ");
  Serial.print(servoAngle);
  Serial.println("º"); 

  delay(1000); // Wait 1 second before the next reading
}