#include <Arduino.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Servo.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);
DHT dht(2, DHT22);  // Assuming the DHT22 sensor is connected to digital pin 2
Servo myservo;      // Declare the Servo object

long duration, inches;
int set_val, percentage;
bool state, pump;

void setup() {
  lcd.begin(16, 2);
  lcd.print("WATER LEVEL:");
  lcd.setCursor(0, 1);
  lcd.print("PUMP: OFF MANUAL");

  pinMode(8, OUTPUT);
  pinMode(9, INPUT);
  pinMode(10, INPUT_PULLUP);
  pinMode(11, INPUT_PULLUP);
  pinMode(12, OUTPUT);

  dht.begin();  // Initialize the DHT sensor
  myservo.attach(3);  // Assuming the servo is connected to digital pin 3

  set_val = analogRead(A0);
  if (set_val > 150) set_val = 150;
}

void loop() {
  digitalWrite(8, HIGH);
  delayMicroseconds(10);
  digitalWrite(8, LOW);
  duration = pulseIn(9, HIGH);
  inches = microsecondsToInches(duration);

  percentage = (set_val - inches) * 100 / set_val;

  lcd.setCursor(12, 0);
  if (percentage < 0) percentage = 0;
  lcd.print(percentage);
  lcd.print("%   ");

  // DHT22 Sensor
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  lcd.setCursor(0, 3);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C  Humid: ");
  lcd.print(humidity);
  lcd.print("%");

  // Servo Control
  if (humidity > 60) {
    myservo.write(90);  // Move the servo to 90 degrees (or your desired position)
  } else {
    myservo.write(0);   // Move the servo to 0 degrees (or another position)
  }

  // Pump Control
  if (percentage < 30 && digitalRead(11)) pump = true;
  if (percentage > 99) pump = false;
  digitalWrite(12, !pump);

  lcd.setCursor(5, 1);
  if (pump) lcd.print("ON  ");
  else lcd.print("OFF ");

  lcd.setCursor(9, 1);
  if (!digitalRead(11)) lcd.print("MANUAL");
  else lcd.print("AUTO   ");
}

long microsecondsToInches(long microseconds) {
  return microseconds / 74 / 2;
}