// Final Project EdSpert Bootcamp IoT
// Judul    : Smart IoT Farming Automation and Monitoring System 
// Kelompok : 5

// Referensi kebutuhan cahaya tanaman : 
// https://sustainablecampus.unimelb.edu.au/__data/assets/pdf_file/0005/2839190/Indoor-plant-workshop-Light-and-Moisture-Requirements.pdf

#include <WiFi.h>
#include <PubSubClient.h>
#include <Wire.h>
#include "LiquidCrystal_I2C.h"
#include "DHT.h"
#include <ESP32Servo.h>
#include <RTClib.h>
RTC_DS1307 rtc;

#define relayPin 18
#define ldrPin 35
#define DHT_PIN 15
#define DHTTYPE DHT22
#define LED_PIN 33
DHT dht(DHT_PIN, DHT22);
LiquidCrystal_I2C lcd(0x27, 20, 4);
LiquidCrystal_I2C lcd2(0x27, 20, 4);

// Representation of the FC28 sensor using a potentiometer
#include "FC28.h"
#define SensorFC28_Pin 34
float soil_moisture;
FC28Sensor mySensor;

const float gama = 0.7;
const float rl10 = 50;

void setup() {
  Serial.begin(9600);
  Serial.flush();
  pinMode(ldrPin, INPUT);
  pinMode(DHT_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(relayPin, OUTPUT);
  mySensor.initFC28Sensor(115200, SensorFC28_Pin);

  Wire.begin();
  if (!rtc.begin()) {
    Serial.println("RTC Not Connected");
    lcd.setCursor(0, 0);
    lcd.print("RTC Unable to Connect");
    while (1);
  }

  Serial.println("Smart Farming System");
  dht.begin();
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("IOT ");
  lcd.setCursor(0, 1);
  lcd.print("Project ");
  lcd.setCursor(0, 2);
  lcd.print("Smart Plant");
  lcd.setCursor(0, 3);
  lcd.print("Monitoring System");
  delay(2000);
  lcd.clear();
}

void loop() {
  // RTC serial print to display time
  DateTime now = rtc.now();
  int year = now.year() % 100;
  Serial.println("Date               : " + String() + now.day() + "/" + now.month() + "/" + year);
  Serial.println("Time               : " + String() + now.hour() + ":" + now.minute() + ":" + now.second());

  // DHT22 sensor data
  float hum = dht.readHumidity();
  float temp = dht.readTemperature();
  Serial.println("Temperature        : " + String(temp, 2) + " °C");
  Serial.println("Humidity           : " + String(hum, 1) + " %");

  // LDR sensor data
  int ldrValue = analogRead(ldrPin);
  ldrValue = map(ldrValue, 4095, 0, 1024, 0); // Convert LDR sensor reading from Arduino ADC value to ESP32 ADC value
  float ldrVoltage = ldrValue / 1024.0 * 5;
  float ldrResistance = 2000 * ldrVoltage / (1 - ldrVoltage / 5);
  float lux = pow(rl10 * 1e3 * pow(10, gama) / ldrResistance, (1 / gama));
  Serial.println("Brightness          : " + String(lux, 3) + " Lux");
  String luxmsg = lux < 807 ? "Low" : (lux > 808 && lux < 1614 ? "Medium" : "High");

  // FC28 Soil Moisture Sensor data
  soil_moisture = mySensor.getSoilMoisture();
  String msg = soil_moisture < 33.33 ? "Wet" : (soil_moisture > 66.66 ? "Dry" : "Normal");
  Serial.println("Soil Moisture Value : " + String(soil_moisture, 2) + " %");

  // Relay to control water supply to plants based on soil moisture condition
  if (soil_moisture > 66.66) {
    digitalWrite(relayPin, HIGH);
  } else {
    digitalWrite(relayPin, LOW);
  }

  // LCD output for monitoring plant conditions
  // Soil Condition
  lcd.setCursor(0, 0);
  lcd.print("Soil       :");
  lcd.setCursor(13, 0);
  lcd.print(msg);

  // Brightness Condition and LED On/Off
  if (lux < 807) {
    digitalWrite(LED_PIN, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("Brightness : ");
    lcd.setCursor(13, 1);
    lcd.print(luxmsg);
  } else if (lux > 808 && lux < 1614) {
    digitalWrite(LED_PIN, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Brightness : ");
    lcd.setCursor(13, 1);
    lcd.print(luxmsg);
  } else {
    digitalWrite(LED_PIN, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Brightness : ");
    lcd.setCursor(13, 1);
    lcd.print(luxmsg);
  }

  // Temperature
  lcd.setCursor(0, 2);
  lcd.print("Temperature :");
  lcd.setCursor(13, 2);
  lcd.print(temp);
  lcd.setCursor(19, 2);
  lcd.print("C");

  // Humidity
  lcd.setCursor(0, 3);
  lcd.print("Humidity   :");
  lcd.setCursor(13, 3);
  lcd.print(hum);
  lcd.setCursor(19, 3);
  lcd.print("%");

  Serial.println("--------------");
  delay(2000);
  lcd.clear();
}