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

#define LCD_ADDR 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2
#define DHT_PIN 7

#define DHT_TYPE DHT22
DHT dht(DHT_PIN, DHT_TYPE);

LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLUMNS, LCD_ROWS);

const int pHSensorPin = A1;          // Analog pin connected to the pH sensor
const int turbiditySensorPin = A2;   // Analog pin connected to the turbidity sensor

const float pHOffset = 7.0;
const float voltageNeutral = 2.5;
const float sensitivity = 0.59;

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.backlight();
  dht.begin();
}

void loop() {
  int sensorValue_pH = analogRead(pHSensorPin);
  float voltage_pH = sensorValue_pH * (5.0 / 1023.0);

  int sensorValue_turbidity = analogRead(turbiditySensorPin);
  float actual_pH = pHOffset - (voltage_pH - voltageNeutral) / sensitivity;

  float temperature = dht.readTemperature();

  Serial.print("Temp: ");
  Serial.print(temperature);
  Serial.println("C");

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp:");
  lcd.setCursor(6, 0);
  lcd.print(temperature, 1);
  lcd.print(0xDF);
  lcd.print("C");

  if (temperature > 27.0) {
    lcd.setCursor(0, 1);
    lcd.print("Initiate cooling");
    Serial.println("Initiate cooling");
  } else if (temperature < 20.0) {
    lcd.setCursor(0, 1);
    lcd.print("Initiate heating");
    Serial.println("Initiate heating");
  } else {
    lcd.setCursor(0, 1);
    lcd.print("Normal temp");
    Serial.println("Normal temp");
  }

  delay(2000); // Delay between readings (adjust as needed)

  // Check turbidity value, pH value, and water level to determine water condition
  if (sensorValue_turbidity > 500 || actual_pH < 6.5 || actual_pH > 7.5) {
    // If turbidity is high or pH is outside the safe range
    Serial.println("Water condition: Not clean");

    // Check pH level to determine acidity, neutrality, or alkalinity
    if (actual_pH < 6.5) {
      Serial.println("Water pH is acidic");
    } else if (actual_pH > 7.5) {
      Serial.println("Water pH is alkaline");
    } else {
      Serial.println("Water pH is neutral");
    }

    // Add code here for the filtering process or any actions for not clean water
  } else {
    // If turbidity is low and pH is within the safe range
    Serial.println("Water is clean");
  }

  delay(2000);

  // dht22
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Turbid: ");
  lcd.print(sensorValue_turbidity);
  lcd.setCursor(0, 1);
  lcd.print("pH: ");
  lcd.print(actual_pH, 2); // Show pH with two decimal places
  delay(2000);

  lcd.clear();
  lcd.setCursor(0, 0);
  if (sensorValue_turbidity > 500 || actual_pH < 6.5 || actual_pH > 7.5) {
    // If turbidity is high or pH is outside the safe range
    lcd.print("Not clean");

    // Check pH level to determine acidity, neutrality, or alkalinity
    lcd.setCursor(0, 1);
    if (actual_pH < 6.5) {
      lcd.print("Water pH is acidic");
    } else if (actual_pH > 7.5) {
      lcd.print("Water pH is alkaline");
    } else {
      lcd.print("Water pH is neutral");
    }
  } else {
    lcd.print("Water is clean");
  }

  delay(2000);
}