// Servo Sweep example for the ESP32
// https://wokwi.com/arduino/projects/323706614646309460

#include <ESP32Servo.h>

const int servoPin = 18;
const int servopin2=4;
#define PIN_TRIG 5
#define PIN_ECHO 21

Servo servo1;
Servo servo2;

//void setup() {
  //servo.attach(servoPin, 500, 2400);
//}



const float BETA = 3950; // should match the Beta Coefficient of the thermistor

void setup() {
  servo1.attach(servoPin, 500, 2400);
  Serial.begin(9600);
  analogReadResolution(10);
  pinMode(15,INPUT);
  pinMode(14,OUTPUT);
  pinMode(26, OUTPUT);
   servo2.attach(servopin2, 500, 2400);
  Serial.begin(115200);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
}
void loop() {
  int pos=0;
  int analogValue = analogRead(15);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  if(celsius>=25)
  {
    digitalWrite(14, HIGH);
    for (pos = 0; pos <= 180; pos += 1) {
    servo1.write(pos);
    //Serial.print("Fan is running.........");
    delay(5);
    Serial.print("FAN IS RUNNING.........");
    }
    for (pos = 180; pos >= 0; pos -= 1) {
    servo1.write(pos);
    //Serial.print("Fan is running.........");
    delay(5);
    Serial.print("FAN IS RUNNING.........");
    }
   } 
  else
  {
    digitalWrite(14, LOW);
   servo1.write(0);
    Serial.print("fan beoomes off.........");
  delay(1000);
  }
 digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);
  int duration = pulseIn(PIN_ECHO, HIGH);
  int dis=0;
  Serial.print("Distance in CM: ");
  Serial.println(duration / 58);
  dis=duration/58;
  if(dis<100)
  {
    digitalWrite(4, HIGH);
    tone(26,600);
     servo2.write(90);
     Serial.print("door open");
     delay(5);

  }
  else
  {
     digitalWrite(4, LOW);
     servo2.write(0);
     noTone(26);

    Serial.print("door locked.....");
  }
  //Serial.print("Distance in inches: ");
  //Serial.println(duration / 148);

}