// SIMULATION DONE BY SUDARSHAN MURALEEDHARAN

#include <ESP32Servo.h>
#include <DHTesp.h>

#define AO_PIN 34 
#define LED_LOW 5
#define LED_MEDIUM 17
#define LED_HIGH 16
#define LED_L1 25
#define LED_L2 26
#define LED_L3 27

const int PIR_SENSOR_OUTPUT_PIN_entry = 13;  
const int PIR_SENSOR_OUTPUT_PIN_exit = 12;
const int SERVO_PIN = 18;
const int DHT_PIN = 15;
int warm_up;
int pos=0;
int persons=0;

DHTesp dhtSensor;
Servo servo;

void setup() {
  // begin serial port
  Serial.begin (9600);
// DHT22 FOR FAN
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22); 

// LEDS
  pinMode(LED_LOW, OUTPUT);
  pinMode(LED_MEDIUM, OUTPUT);
  pinMode(LED_HIGH, OUTPUT);
  pinMode(LED_L1, OUTPUT);
  pinMode(LED_L2, OUTPUT);
  pinMode(LED_L3, OUTPUT);

// SERVO FOR DOOR
  servo.attach(SERVO_PIN, 500, 2400);

// PIR FOR DETECTION
  pinMode(PIR_SENSOR_OUTPUT_PIN_entry, INPUT);
  pinMode(PIR_SENSOR_OUTPUT_PIN_exit, INPUT); 
  Serial.begin(115200); /* Define baud rate for serial communication */
  Serial.println("Waiting For Power On Warm Up");
  delay(2000); 
  Serial.println("Ready!");

// LDR FOR LIGHTING
  Serial.begin(9600);
  pinMode(AO_PIN, INPUT);
}

void loop() {
// PIR FOR ENTRY
int sensor_output;
  sensor_output = digitalRead(PIR_SENSOR_OUTPUT_PIN_entry);
  if( sensor_output == LOW )
  {
    if( warm_up == 1 )
     {
      Serial.print("Loading...\n\n");
      warm_up = 0;
      delay(2000);
    }
    Serial.print("No visitor.\n\n");
    delay(1000);
  }
  else
  {
    Serial.print("Welcome, visitor!\n\n");   
    warm_up = 1;
    persons+=1;
    Serial.print("Persons:"+String(persons)+"\n");
    delay(1000);
  }

// SERVO
if (sensor_output == HIGH || persons>0)
{
  for (pos = 0; pos <= 90; pos += 1) { // 1 clockwise quarter rotation
    servo.write(pos);
    delay(15);
  }
  for (pos = 90; pos >= 0; pos -= 1) { // 1 anticlockwise quarter rotation
    servo.write(pos);
    delay(15);
  }
// LDR
  int lightValue = analogRead(AO_PIN);
  if (lightValue < 250) {
    digitalWrite(LED_L1, LOW); 
    digitalWrite(LED_L2, LOW);
    digitalWrite(LED_L3, LOW);    
  }
  else if (lightValue >= 250 && lightValue < 550) {
    digitalWrite(LED_L1, HIGH); 
    digitalWrite(LED_L2, LOW);
    digitalWrite(LED_L3, LOW); 
  }
  else if (lightValue >= 550 && lightValue < 850) {
    digitalWrite(LED_L1, HIGH); 
    digitalWrite(LED_L2, HIGH);
    digitalWrite(LED_L3, LOW);     
  }
  else {
    digitalWrite(LED_L1, HIGH); 
    digitalWrite(LED_L2, HIGH);
    digitalWrite(LED_L3, HIGH);
  }

// DHT22
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  int Temp = dhtSensor.getTemperature();
  if (Temp >= 30 && Temp < 35) {
    digitalWrite(LED_LOW, HIGH); 
    digitalWrite(LED_MEDIUM, LOW);
    digitalWrite(LED_HIGH, LOW);
  }
  else if (Temp >= 35 && Temp < 40) {
    digitalWrite(LED_LOW, LOW); 
    digitalWrite(LED_MEDIUM, HIGH);
    digitalWrite(LED_HIGH, LOW);
  }
  else if (Temp >= 40) {
    digitalWrite(LED_LOW, LOW); 
    digitalWrite(LED_MEDIUM, LOW);
    digitalWrite(LED_HIGH, HIGH);
  }  
  else {
    digitalWrite(LED_LOW, LOW); 
    digitalWrite(LED_MEDIUM, LOW);
    digitalWrite(LED_HIGH, LOW);
  }
  delay(2000);    
}  

// PIR FOR EXIT
  sensor_output = digitalRead(PIR_SENSOR_OUTPUT_PIN_exit);
  if( sensor_output == LOW )
  {
    if( warm_up == 1 )
     {
      Serial.print("Loading...\n\n");
      warm_up = 0;
      delay(2000);
    }
    Serial.print("No one left.\n\n");
    delay(1000);
  }
  else
  {
    Serial.print("Thank you, come again!\n\n");   
    warm_up = 1;
    persons-=1;
    Serial.print("Persons:"+String(persons)+"\n");
    delay(1000);
  }

// SERVO
if (sensor_output == HIGH)
{
  for (pos = 0; pos <= 90; pos += 1) { // 1 clockwise quarter rotation
    servo.write(pos);
    delay(15);
  }
  for (pos = 90; pos >= 0; pos -= 1) { // 1 anticlockwise quarter rotation
    servo.write(pos);
    delay(15);
  }

if (persons<1) {
 // LDR
    Serial.println("LIGHTS: OFF");
   
// DHT22
    Serial.println("FAN: OFF");  

  delay(2000);  
}
   
}  
}