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#define BLYNK_TEMPLATE_ID "TMPL69q_w3zyk"
#define BLYNK_TEMPLATE_NAME "Water level and Humidity"
#define BLYNK_AUTH_TOKEN "Hgg9gXwNkoZNdRx39HdW06z2vOWsEEBD"
#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include "DHTesp.h"
#include <LiquidCrystal_I2C.h>
#include <Stepper.h>

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

#define PIN_TRIG 13
#define PIN_ECHO 12

#define I2C_ADDR 0x27
#define LCD_COLUMNS 16
#define LCD_LINES 2

#define RELAY_MDL1 23
#define RELAY_MDL2 14

const int DHT_PIN = 15;

const int ENABLE_PIN_SMD1 = 4;
const int STEP_PIN_SMD1 = 18;
const int DIR_PIN_SMD1 = 19;
const int STEPS_REVOLUTION_SMD1 = 200;

const int ENABLE_PIN_SMD2 = 25;
const int STEP_PIN_SMD2 = 26;
const int DIR_PIN_SMD2 = 27;
const int STEPS_REVOLUTION_SMD2 = 200;

BlynkTimer timer;

DHTesp dhtSensor;

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

Stepper stepper1(STEPS_REVOLUTION_SMD1, STEP_PIN_SMD1, DIR_PIN_SMD1);
bool isMotor1On = false;

Stepper stepper2(STEPS_REVOLUTION_SMD2, STEP_PIN_SMD2, DIR_PIN_SMD2);
bool isMotor2On = false;

bool humidityPumpState = false;
bool waterLevelPumpState = false;

BLYNK_WRITE(V2) {
  humidityPumpState = param.asInt();
}

BLYNK_WRITE(V3) {
  waterLevelPumpState = param.asInt(); 

void setup() {
  Serial.begin(115200);

  //Blynk connection
  Blynk.begin(auth, ssid, pass);

  // Initialize DHT Sensor using library
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  // Initialize Ultrasonic Sensor 
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.clear();

  // Initialize relay module right
  pinMode(RELAY_MDL1, OUTPUT);

    // Initialize relay module Left
  pinMode(RELAY_MDL2, OUTPUT);

  // Set pump states to OFF
  humidityPumpState = false;
  waterLevelPumpState = false;

  // Initialize A4988 Stepper Motor Driver Right
  stepper1.setSpeed(400);
  stepper1.step(8);

  // Initialize A4988 Stepper Motor Driver Left
  stepper2.setSpeed(400);
  stepper2.step(8);
}


void loop() {
  //Humidity measurement & read result :
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Kelembapan : " + String(data.humidity, 1) + "%");
  Blynk.virtualWrite(V0, data.humidity);

  //Humidity Alert
  if (data.humidity <= 39) {
    digitalWrite(RELAY_MDL1, LOW);
    Serial.println("Kelembapan Tanah Kering");

  } else if (data.humidity >= 40 && data.humidity <= 60) {
    digitalWrite(RELAY_MDL1, HIGH);
    Serial.println("Kelembapan Tanah Ideal");

  } else {
    digitalWrite(RELAY_MDL1, LOW);
    Serial.println("Kelembapan Tanah Terlalu Basah");
  }

  // Start water level measurement:
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Read water level result:
  int duration = pulseIn(PIN_ECHO, HIGH);
  Serial.print("Ketinggian air: ");
  int waterLevel = duration / 58;
  Serial.print(waterLevel);
  Serial.println(" cm");
  Blynk.virtualWrite(V1, waterLevel);

  //Water Level Alert
  if (waterLevel >= 4 && waterLevel <= 8) {
    digitalWrite(RELAY_MDL2, HIGH);
    Serial.println("Ketinggian air optimal");

  } else {
    digitalWrite(RELAY_MDL2, LOW);
    Serial.println("Ketinggian air tidak optimal");
  }

  //LCD Output Humidity & Water Level
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("Humiditas:" + String(data.humidity, 1) + "% ");
  lcd.setCursor(0, 1);
  lcd.print("Tinggi air:" + String(waterLevel) + "cm");

  Serial.println("---");

  // Humidity Pump Control
  if (humidityPumpState) {
    if (!isMotor1On) {
      stepper1.step(808);
      isMotor1On = true;
    }
  } else {
    if (isMotor1On) {
      stepper1.step(-808);
      isMotor1On = false;
    }
  }

  // Water Level Pump Control
  if (waterLevelPumpState) {
    if (!isMotor2On) {
      stepper2.step(808);
      isMotor2On = true;
    }
  } else {
    if (isMotor2On) {
      stepper2.step(-808);
      isMotor2On = false;
    }
  }

  delay(2000);

  Blynk.run();
  timer.run();
}