#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6kigsaFWS"
#define BLYNK_TEMPLATE_NAME "hidroponik"
#define BLYNK_AUTH_TOKEN "B-UTKJqeAwTeK2-YBGLHnGA2OkCT8WU5"
#define PIN_RELAY_POMPA 12
#define PIN_RELAY_POMPA_IN 13
#define PIN_PH 35
#define PIN_TDS 34

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHTesp.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

DHTesp dhtSensor;
BlynkTimer timer;
LiquidCrystal_I2C lcd(0x27, 20, 4);

const int DHT_PIN = 14;
const int TRIGGER_PIN = 15;
const int ECHO_PIN = 2;

int isPumpOn = 0;

void sendSensorData() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();

  lcd.setCursor(0, 0); 
  lcd.print("Temperature: ");
  lcd.setCursor(15, 0); 
  lcd.print(data.temperature);
  lcd.setCursor(0,1);
  lcd.print("Humidity: ");
  lcd.setCursor(15, 1);
  lcd.print(data.humidity);
  
  Blynk.virtualWrite(V1, data.temperature);
  Blynk.virtualWrite(V2, data.humidity);

  int ph = analogRead(PIN_PH);
  int konversiPh = ph * 14 / 4095;
  int tds = analogRead(PIN_TDS);
  int konversiTds = tds * 3000 / 4095;

  lcd.setCursor(0, 2); 
  lcd.print("PH: ");
  lcd.setCursor(6, 2); 
  lcd.print(konversiPh);
  lcd.setCursor(11,2);
  lcd.print("TDS: ");
  lcd.setCursor(16, 2);
  lcd.print(konversiTds);

  Blynk.virtualWrite(V3, konversiTds);
  Blynk.virtualWrite(V4, konversiPh);

  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);

  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  
  long duration = pulseIn(ECHO_PIN, HIGH);
  int distance = duration * 0.0343 / 2;
  
  lcd.setCursor(11, 3);
  if (distance < 10) {
    digitalWrite(PIN_RELAY_POMPA_IN, LOW);
    lcd.print("PUMP2:OFF");
  } else if (distance > 150) {
    digitalWrite(PIN_RELAY_POMPA_IN, HIGH);
    lcd.print("PUMP2:ON ");
  }

  lcd.setCursor(0, 3);
  if (isPumpOn == 1) {  
    lcd.print("PUMP1:ON ");
  } else {
    lcd.print("PUMP1:OFF");
  }
}

BLYNK_WRITE (V0) {
  isPumpOn = param.asInt();

  lcd.setCursor(6, 3);
  if (isPumpOn == 1) {
    digitalWrite(PIN_RELAY_POMPA, HIGH);
    lcd.print("ON ");
    Blynk.virtualWrite(V0, HIGH);
  } else {
    digitalWrite(PIN_RELAY_POMPA, LOW);
    lcd.print("OFF");
    Blynk.virtualWrite(V0, LOW);
  }
}

void setup() {
  lcd.init();
  lcd.backlight();

  lcd.setCursor(7, 0);
  lcd.print("Sistem");
  lcd.setCursor(3, 1);
  lcd.print("IoT Hidroponik");

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(PIN_RELAY_POMPA, OUTPUT);
  pinMode(PIN_RELAY_POMPA_IN, OUTPUT);
  pinMode(PIN_PH, INPUT);
  pinMode(PIN_TDS, INPUT);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  Blynk.begin(auth, ssid, pass);
  
  lcd.clear();
  
  timer.setInterval(1000, sendSensorData);
}

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