#define BLYNK_TEMPLATE_ID "TMPL6PcDyzDtO"
#define BLYNK_TEMPLATE_NAME "Smart Greenhouse IoT"
#define BLYNK_AUTH_TOKEN "MxUZrTchd9B3OzU4z0VQ5utIKiQyvFA6"

#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define ldrPin 36
int dir_pin = 32;
int step_pin = 33;
int numberOfSteps = 200;
int pulseWidthMicros = 20;  // microsecond
int millisbetweenSteps = 60;

LiquidCrystal_I2C lcd(0x27, 16, 2);


char ssid[] = "Wokwi-GUEST"; //nama hotspot yang digunakan
char pass[] = ""; //password hotspot yang digunakan

const float GAMMA = 0.7;
const float RL10 = 50;

void sendData(){
  int intensitas = analogRead(ldrPin);
  float voltage = intensitas / 4095. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  lcd.setCursor(0,0);
  lcd.print("Lux = ");
  lcd.print(lux);
  Blynk.virtualWrite(V1, intensitas);
  Blynk.virtualWrite(V2, lux);


  Serial.print("Lux = ");
  Serial.println(lux);

  if(lux >=10800){
    digitalWrite(dir_pin, HIGH);
    lcd.setCursor(0,1);
    lcd.print("Motor Menyala");
      for(int n = 0; n < numberOfSteps; n++) {
        digitalWrite(step_pin, HIGH);
        delayMicroseconds(pulseWidthMicros); 
        digitalWrite(step_pin, LOW);
        delay(millisbetweenSteps);
      }
    
    delay(1000);
    Blynk.virtualWrite(V3, 255);
    Blynk.virtualWrite(V4, 0);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Lux = ");
    lcd.print(lux);
    lcd.setCursor(0,1);
    lcd.print("Tirai Tutup");
    delay(10000);

  }
  else{
    digitalWrite(dir_pin, LOW);
      for(int n = 0; n < numberOfSteps; n++) {
        lcd.setCursor(0,1);
        lcd.print("Motor Menyala");
        digitalWrite(step_pin, HIGH);
       // delayMicroseconds(pulseWidthMicros); // probably not needed
       digitalWrite(step_pin, LOW);
      delay(millisbetweenSteps);
      }
      
    delay(1000);
    Blynk.virtualWrite(V3, 0);
    Blynk.virtualWrite(V4, 255);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Lux = ");
    lcd.print(lux);
    lcd.setCursor(0,1);
    lcd.print("Tirai Buka");
    delay(10000);
  }

}

BlynkTimer timer;

void setup(){
    pinMode(ldrPin, INPUT);
    Serial.begin(115200);

    delay(1000);
    Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

    lcd.init();
    lcd.backlight();

    timer.setInterval(1L, sendData);

    pinMode(dir_pin, OUTPUT);
    pinMode(step_pin, OUTPUT);
}

void loop(){
  Blynk.run();
  timer.run();
}