#include <LiquidCrystal.h>
#include <SoftwareSerial.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>
#define SCREEN_WIDTH 128    // OLED display width, in pixels
#define SCREEN_HEIGHT 64    // OLED display height, in pixels
#define OLED_RESET -1       // Reset pin # (or -1 if sharing Arduino reset pin)
#define RE 8
#define DE 7
// Define pin numbers
#define DHT_PIN 2      // Pin to which DHT22 sensor is connected
#define BUZZER_PIN 7   // Pin to which the buzzer is connected
// Define the type of DHT sensor
#define DHT_TYPE DHT22 // Change to DHT11 if using DHT11 sensor
//const byte code[]= {0x01, 0x03, 0x00, 0x1e, 0x00, 0x03, 0x65, 0xCD};
const byte nitro[] = {0x01, 0x03, 0x00, 0x1e, 0x00, 0x01, 0xe4, 0x0c};
const byte phos[] = {0x01, 0x03, 0x00, 0x1f, 0x00, 0x01, 0xb5, 0xcc};
const byte pota[] = {0x01, 0x03, 0x00, 0x20, 0x00, 0x01, 0x85, 0xc0};
// byte values[11];
SoftwareSerial mod(2, 3);
DHT dht(DHT_PIN, DHT_TYPE);
// Initialize the LCD (pins connected to the LCD: RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(13, 12, 11, 10, 9, 8);
// LiquidCrystal lcd2(13, 12, 11, 10, 9, 8);
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
int red_led = 11;
int green_led = 10;
int blue_led = 9;

void setup() {

  pinMode(RE, OUTPUT);
  pinMode(DE, OUTPUT);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); //initialize with the I2C addr 0x3C (128x64)
  delay(500);
  display.clearDisplay();
  display.setCursor(25, 15);
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.println(" NPK Sensor");
  display.setCursor(25, 35);
  display.setTextSize(1);
  display.print("Menghitung ...");
  display.display();
  delay(3000);
  // Initialize the LCD
  lcd.begin(16, 2);
  lcd.print("Temp:");
  lcd.setCursor(0, 1);
  lcd.print("Humidity:");
  // Initialize the DHT sensor
  dht.begin();
  // Set up the buzzer pin
  pinMode(BUZZER_PIN, OUTPUT);
  // Initialize serial communication
  Serial.begin(9600);
  // Set up the pins for the moisture sensor LEDs
  pinMode(5, OUTPUT); // High moisture LED
  pinMode(6, OUTPUT);  // Medium moisture LED
  pinMode(3, OUTPUT);  // Low moisture LED
  // Set up the pin for the moisture sensor
  pinMode(A0, INPUT);
}
void loop() {
  byte val1, val2, val3;
  val1 = random(0, 350); // Generate random value for nitrogen (0-255)
  delay(250);
  val2 = random(0, 350); // Generate random value for phosphorous (0-255)
  delay(250);
  val3 = random(0, 330); // Generate random value for potassium (0-255)
  delay(250);
  Serial.println();
  Serial.print("Nitrogen: ");
  Serial.print(val1);
  Serial.println(" mg/kg");
  Serial.print("Phosphorous: ");
  Serial.print(val2);
  Serial.println(" mg/kg");
  Serial.print("Potassium: ");
  Serial.print(val3);
  Serial.println(" mg/kg");
  Serial.println();
 
  delay(2000);
  display.clearDisplay();
  display.setTextSize(2);
  display.setCursor(0, 5);
  display.print("N: ");
  display.print(val1);
  display.setTextSize(1);
  display.print(" mg/kg");
  display.setTextSize(2);
  display.setCursor(0, 25);
  display.print("P: ");
  display.print(val2);
  display.setTextSize(1);
  display.print(" mg/kg");
  display.setTextSize(2);
  display.setCursor(0, 45);
  display.print("K: ");
  display.print(val3);
  display.setTextSize(1);
  display.print(" mg/kg");
  display.display();
  // Read the moisture sensor value
  int moistureValue = analogRead(A0);
  if(moistureValue<=100){
    pinMode(red_led, OUTPUT);
    pinMode(green_led, OUTPUT);
    pinMode(blue_led, OUTPUT);
    }
  // Determine moisture level and set LEDs accordingly
  if (moistureValue >= 100 && moistureValue <= 499) {
    digitalWrite(5, LOW);
    digitalWrite(6, HIGH);
    digitalWrite(3, LOW);
    Serial.println("Medium amount of Moisture");
    delay(1000);
  } else if (moistureValue >= 500 && moistureValue <= 1023) {
    digitalWrite(5, HIGH);
    digitalWrite(6, LOW);
    digitalWrite(3, LOW);
    Serial.println("High Moisture");
    delay(1000);
  } else {
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
    digitalWrite(3, HIGH);
    Serial.println("Low Moisture");  
  delay(500);
  led_color(255,0,255);
  delay(500);
  led_color(255,255,0);
  delay(500);
    // Delay for stability
    delay(1000);
  }


  // Read temperature and humidity from the DHT sensor
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Display temperature on the LCD
  lcd.setCursor(6, 0);
  lcd.print(temperature, 1);
  lcd.print("C");

  // Display humidity on the LCD
  lcd.setCursor(10, 1);
  lcd.print(humidity, 1);
  lcd.print("%");

  // Check if temperature is above a threshold value and activate the buzzer
 if (temperature > 30.0 || temperature<0.0) {
    digitalWrite(BUZZER_PIN, HIGH);
    tone(BUZZER_PIN, 10000); // Generate a tone of 1000 Hz
    
} else {
    digitalWrite(BUZZER_PIN, LOW);
    noTone(BUZZER_PIN); // Stop the tone
    
}
  // Delay before next loop iteration
  // delay(1000);
  
}
void led_color(int red_value, int green_value,int blue_value)
{
analogWrite(red_led,red_value);
analogWrite(green_led,green_value);
analogWrite(blue_led,blue_value);
}