#define BLYNK_TEMPLATE_ID "TMPL65eCvvgb6" //Blynk template ID
#define BLYNK_TEMPLATE_NAME "Plant monitoring system" //name of Blynk template
#define BLYNK_AUTH_TOKEN "lpYfQuUFSK4i-JknGddaENfFKM2xx-Vj" //Blynk authentication token
#define BLYNK_PRINT Serial  //Blynk debugging output
#define I2C_ADDR    0x27    //12C address of the LCD module
#define LCD_COLUMNS 16      //define 16 columns in a line on LCD
#define LCD_LINES   4       //define 4 lines on LCD

#include <WiFi.h>               //WiFi communication library
#include <BlynkSimpleEsp32.h>   //Blynk library
#include <LiquidCrystal_I2C.h>  //12C LCD control library
#include <DHTesp.h>             //DHT sensor library
#include <DHT.h>                //DHT sensor library
#include "ESP32Servo.h"         //Serco motor control library

char auth[] = BLYNK_AUTH_TOKEN ;  //set up Blynk token to connect server

char ssid[] = "Wokwi-GUEST";  //WiFi network SSID
char pass[] = "";             //Password

const int DHT_PIN = 15; //define 15 as DHT pin
const int buttonPin = 33;
const int buttonPin1 = 25;

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);  //initializes the LCD address, num of colm and lines
int value0, value1, value2, value3, value6;   //LEDs' value

//define pin of LED
byte LED_R = 26;
byte LED_Y = 27;
byte LED_G = 14;
byte LED_B = 12;

//define DHT sensor
DHTesp dht;
DHTesp dhtSensor;

//define pin of Servo motor and reading value 
Servo myservo;
int potpin = 34;
int val;

//Lux calculation
const float GAMMA = 0.7;
const float RL10 = 50;

BlynkTimer timer; //creates class

bool manualControl = false; //declare manualControl as false(auto)/true(manual)

void sendSensor()
{
   //Measure temperature and humidity using the DHT sensor
   TempAndHumidity  data = dht.getTempAndHumidity();
   
   int analogValue = analogRead(35);  //Read an analog value from pin 35
   //Convert analog value to voltage and calculate resistance
   float voltage = analogValue / 1024. * 5;
   float resistance = 2000 * voltage / (1 - voltage / 5);
   //Calculate lux using the resistance value and constants
   float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

   //Print temperature, humidity and lux readings to Serial monitor
   Serial.print("Temperature: ");
   Serial.println(data.temperature);
   Serial.println("C ");
   Serial.print("Humidity: ");
   Serial.println(data.humidity);
   Serial.println("% ");
   Serial.print("Lux: ");
   Serial.println(lux);
   Serial.println("---------");

   //Update LCD display with temperature, humidity, and lux readings
   lcd.setCursor(0, 1);
   lcd.print(" Temp: " + String(data.temperature, 1) + "\xDF"+"C  ");
   lcd.setCursor(0, 2);
   lcd.print(" Humidity: " + String(data.humidity, 1) + "% ");
   lcd.setCursor(0, 3);
   lcd.print(" Lux: " + String(lux, 1));

   //Assign temperature and humidity values to variables
   float H = data.humidity;      //Humidity value
   float T = data.temperature;   //Temperature value
   int val = analogRead(potpin); //Read analog value from potentiometer connected to potpin

//if loop, if manualControl is !(true)= automatic
if (!manualControl) {
  //first if, if temperature equal to 25
  if (T == 25.0) {
    //second if, temperature=25 and humidity <= 20
    //turn on Red LED, move servo, and display lcd message 
    if (H <= 20.0){
      digitalWrite(LED_R, HIGH);
      digitalWrite(LED_Y, LOW);
      digitalWrite(LED_G, LOW);
      digitalWrite(LED_B, LOW);
      val = map(val, 0, 4095, 0, 180);
      myservo.write(val);
      lcd.setCursor(0, 0);
      lcd.print(" Give me some water!");
      }
      //second if, temperature=25 and humidity > 21
      //turn on Yellow LED and display lcd message
      else if (H > 21.0){
        digitalWrite(LED_R, LOW);
        digitalWrite(LED_Y, HIGH);
        digitalWrite(LED_G, LOW);
        digitalWrite(LED_B, LOW);
        lcd.setCursor(0, 0);
        lcd.print(" Feed me some snacks!");
      }
      //if humidity between 20.1 - 21.0
      //turn off all the LEDs and display message
      else {
        digitalWrite(LED_R, LOW);
        digitalWrite(LED_Y, LOW);
        digitalWrite(LED_G, LOW);
        digitalWrite(LED_B, LOW);
        lcd.setCursor(0, 0);
        lcd.print(" ---^V^---");
      }
  }
  //first if, if temperature lower than 25
  else if (T < 25.0) {
    //second if, temperature<25 and humidity>30
    //turn on Blue LED and display message
    if (H > 30.0) {
       digitalWrite(LED_R, LOW);
       digitalWrite(LED_Y, LOW);
       digitalWrite(LED_G, LOW);
       digitalWrite(LED_B, HIGH);
       lcd.setCursor(0, 0);
       lcd.print(" I need sunshine!");
    }
    //second if, temperature<25 and humidity<=30
    //turn off all LEDs and display message
    else {
       digitalWrite(LED_R, LOW);
       digitalWrite(LED_Y, LOW);
       digitalWrite(LED_G, LOW);
       digitalWrite(LED_B, LOW);
       lcd.setCursor(0, 0);
       lcd.print(" ---^V^---");
    }
  }
  //first if, if temperature higher than 25
  else if (T > 25.0){
    //second if, temperature>25 and humidity < 30
    //turn on Red and Green LED, move servo and display message
    if (H < 30.0) {
       digitalWrite(LED_R, HIGH);
       digitalWrite(LED_Y, LOW);
       digitalWrite(LED_G, HIGH);
       digitalWrite(LED_B, LOW);
       val = map(val, 0, 4095, 0, 180);
       myservo.write(val);
       lcd.setCursor(0, 0);
       lcd.print(" Hot and Dry!");
    }
    //second if, temperature>25 and humidity>=30
    //turn off all LEDs and display message
    else {
       digitalWrite(LED_R, LOW);
       digitalWrite(LED_Y, LOW);
       digitalWrite(LED_G, LOW);
       digitalWrite(LED_B, LOW);
       lcd.setCursor(0, 0);
       lcd.print(" ---^V^---");
    }
  }
}

//send value of temperature, humidity and lux to Blynk server
Blynk.virtualWrite(V4, data.temperature); //V4 as virtual pin of temperature
Blynk.virtualWrite(V5, data.humidity);    //V5 as virtual pin of humidity
Blynk.virtualWrite(V7, lux);              //v7 as virtual pin of lux

}

BLYNK_CONNECTED() {
  Blynk.syncVirtual(V0);
  Blynk.syncVirtual(V1);
  Blynk.syncVirtual(V2);
  Blynk.syncVirtual(V3);
  Blynk.syncVirtual(V6);
}

//V0 = virtual pin of Red LED 
BLYNK_WRITE(V0)
{
  value0 = param.asInt();         //assigns V0 to value0
  digitalWrite(LED_R, value0);    //set LED_R on value0
  Blynk.virtualWrite(V7, value0); //updates the value of V7 to value0
  manualControl = value0 == HIGH; //set manualControl as true if value0 = 1
  cekAllLed();                    //function of automaticlly turn on/off all LEDs
}

//V1 = virtual pin of Yellow LED
BLYNK_WRITE(V1)
{
  value1 = param.asInt();         //assigns V1 to value1
  digitalWrite(LED_Y, value1);    //set LED_Y on value1
  Blynk.virtualWrite(V8, value1); //updates the value of V8 to value1
  manualControl = value1 == HIGH; //set manualControl as true if value1 = 1
  cekAllLed();                    //function of automaticlly turn on/off all LEDs
}

//V2 = virtual pin of Green LED
BLYNK_WRITE(V2)
{
  value2 = param.asInt();         //assigns V2 to value2
  digitalWrite(LED_G, value2);    //set LED_G on value2
  Blynk.virtualWrite(V9, value2); //updates the value of V9 to value2
  manualControl = value2 == HIGH; //set manualControl as true if value2 = 1
  cekAllLed();                    //function of automaticlly turn on/off all LEDs
}

//V3 = virtual pin of Blue LED
BLYNK_WRITE(V3)
{
  value3 = param.asInt();          //assigns V3 to value3
  digitalWrite(LED_B, value3);     //set LED_B on value3
  Blynk.virtualWrite(V10, value3); //updates the value of V10 to value3
  manualControl = value3 == HIGH;  //set manualControl as true if value3 = 1
  cekAllLed();                     //function of automaticlly turn on/off all LEDs
}

//V6 = virtual pin of auto turn on/off all LEDs
BLYNK_WRITE(V6)
{
  value6 = param.asInt();           //assigns V6 to value6

  digitalWrite(LED_R, value6);
  Blynk.virtualWrite(V7, value6);
  Blynk.virtualWrite(V0, value6);
  
  digitalWrite(LED_Y, value6);
  Blynk.virtualWrite(V8, value6);
  Blynk.virtualWrite(V1, value6);

  digitalWrite(LED_G, value6);
  Blynk.virtualWrite(V9, value6);
  Blynk.virtualWrite(V2, value6);

  digitalWrite(LED_B, value6);
  Blynk.virtualWrite(V10, value6);
  Blynk.virtualWrite(V3, value6);

  manualControl = value6 == HIGH;
}

//V8 = virtual pin of display value of lux in Blynk
BLYNK_WRITE(V8)
{
  val = param.asInt();              
  Blynk.virtualWrite(V8, val);
}

//if function for turn on/off all LEDs
void cekAllLed(){
  if(value0 == 1 && value1 == 1 && value2 == 1 && value3 == 1){
    Blynk.virtualWrite(V6, 1);
  }
  else{
    Blynk.virtualWrite(V6, 0);
  }
}

void setup()
{
   Serial.begin(115200);  //Initialize the Serial console for debugging
   dht.setup(DHT_PIN, DHTesp::DHT22); //Initialize DHT sensors
   //Initialize LCD display and backlight
   lcd.init();
   lcd.backlight();
   dhtSensor.setup(DHT_PIN, DHTesp::DHT22); //Initialize another DHT sensor
   //Set LED pins as output for different plant care activiies
   pinMode(LED_R, OUTPUT);   // consider as waterind
   pinMode(LED_Y, OUTPUT);   // consider as fertilize
   pinMode(LED_G, OUTPUT);   // consider as shade net
   pinMode(LED_B, OUTPUT);   // consider as light up
   pinMode(5, INPUT);   //set a pin as input
   pinMode(buttonPin, INPUT_PULLUP);
   pinMode(buttonPin1, INPUT);
   Blynk.begin(auth, ssid, pass); //Initialize Blynk communication with provided credentials
   timer.setInterval(6000, sendSensor); //set up a timer interval to call sendSensor function every 6 seconds
   myservo.attach(19);  //attach a servo motor to pin 19
}

//set up loop()
void loop()
{
   //Execute Blynk communication and timer tasks
   Blynk.run(); 
   timer.run(); 

  //  buttonState = digitalRead(buttonPin);
  //   if (buttonState == HIGH) {
  //     digitalWrite(LED_R, HIGH);
  //   }
  //   else {
  //     digitalWrite(LED_R, LOW);
  //   } 

   delay(1000); //add a delat of 1 second for loop iteration
   listen_push_buttons();
}

void listen_push_buttons(){
 
    if(digitalRead(buttonPin) == LOW){
      Blynk.virtualWrite(V0, 0); //update button state
      digitalWrite(LED_R, LOW);
    }
    else {
      Blynk.virtualWrite(V0, 1); //update button state
    }

    if(digitalRead(buttonPin1) == LOW){
      Blynk.virtualWrite(V1, 1); //update button state
      digitalWrite(LED_Y, LOW);
    }
    else {
      Blynk.virtualWrite(V1, 1); //update button state
    }
    
}