//LIBRARY ============================================================
#include <LiquidCrystal_I2C.h>//libray LCD
#include "DHT.h"//library DHT22
//====================================================================

//DHT 22 SESNOR ======================================================
// Defines the DHT22 PIN and DHT sensor type.
#define DHTPIN  23
// #define DHTTYPE DHT22
#define DHTTYPE DHT22
String Status_Read_Sensor = "";
int Temp;
int Humd;

#define BUTTON1 34 //mendefinisikan pin 34 sebagai BUTTON1
#define BUTTON2 35 //mendefinisikan pin 35 sebagai BUTTON2

bool button1 = 0; //variabel untuk button1
bool button2 = 0; //variabel untuk button2

int menu = 0;
int masukMenu = 0;
bool k1 = 0;
bool k2 = 0;

DHT dht22(DHTPIN, DHTTYPE);
//====================================================================

//LCD 16x2 ===========================================================
LiquidCrystal_I2C lcd(0x27, 16, 2);
//====================================================================

//FUNCTION MEMBACA DATA SENSOR DHT 22 ================================
void bacaDHT22() {
  Humd = dht22.readHumidity();
  Temp = dht22.readTemperature();

  if (isnan(Humd) || isnan(Temp)) {
    Serial.println();
    Serial.println(F("Failed to read from DHT sensor!"));
    Serial.println();

    Status_Read_Sensor = "Failed";
    Temp = 0;
    Humd = 0;
  } else {
    Status_Read_Sensor = "Success";
  }

  Serial.println();
  Serial.println("-------------");
  Serial.print(F("Status_Read_Sensor : "));
  Serial.print(Status_Read_Sensor);
  Serial.print(F(" | Humidity : "));
  Serial.print(Humd);
  Serial.print(F("% | Temperature : "));
  Serial.print(Temp);
  Serial.println(F("°C"));
  Serial.println("-------------");
}
//====================================================================

//MAIN SETUP =========================================================
void setup() {
  Serial.begin(115200);

  pinMode(BUTTON1, INPUT);
  pinMode(BUTTON2, INPUT);

  lcd.init();
  lcd.backlight();

  lcd.setCursor(0,0);
  lcd.print("SMKN 39 JAKARTA");
  lcd.setCursor(0,1);
  lcd.print("TAV");
  delay(2000);
  lcd.clear();
}
//=====================================================================

//MAIN LOOP ===========================================================
void loop() {
  button1 = digitalRead(BUTTON1);
  button2 = digitalRead(BUTTON2);

  //Button 1
  if(button1 == 1 && k1 == 0){
    k1 = 1;
  }
  if(button1 == 0 && k1 == 1){
    //isi program
    menu++;
    if(menu > 1){
      menu = 0;
    }
    k1 = 0;
  }
  //Button 2
  if(button2 == 1 && k2 == 0){
    k2 = 1;
  }
  if(button2 == 0 && k2 == 1){
    //isi program
    if(menu == 0){
      masukMenu = 1;//masuk temperatur
    }
    if(menu == 1){
      masukMenu = 2;//masuk humidity
    }
    k2 = 0;
  }

  if(menu == 1){
    lcd.setCursor(0,0);
    lcd.print("  Temperatur    ");
    lcd.setCursor(0,1);
    lcd.print("> Humidity      ");
  }
  else{
    lcd.setCursor(0,0);
    lcd.print("> Temperatur    ");
    lcd.setCursor(0,1);
    lcd.print("  Humidity      ");
  }

  while(masukMenu == 1){
    bacaDHT22();
    lcd.setCursor(0,0);
    lcd.print("      Mode      ");
    lcd.setCursor(0,1);
    lcd.print("Temperatur: ");
    lcd.print(Temp);
    lcd.print("C");
  }

  while(masukMenu == 2){
    bacaDHT22();
    lcd.setCursor(0,0);
    lcd.print("      Mode      ");
    lcd.setCursor(0,1);
    lcd.print("Humidity: ");
    lcd.print(Humd);
    lcd.print("%");
  }
}
//=====================================================================