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

#define DHTPIN A1
#define DHTTYPE DHT22
#define BUTTON_PIN_A 2
#define BUTTON_PIN_B 3
#define BUTTON_PIN_C 4

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

int LDRPin = A0;
int sbA, sbB, sbC;
int buttonStateA = LOW, buttonStateB = LOW, buttonStateC = LOW;

void setup() {
  Serial.begin(9600);
  pinMode(LDRPin, INPUT);
  Serial.println("Sistem Monitoring Suhu");

  lcd.begin(16, 2);
  dht.begin();

  pinMode(BUTTON_PIN_A, INPUT);
  pinMode(BUTTON_PIN_B, INPUT);
  pinMode(BUTTON_PIN_C, INPUT);

  lcd.setCursor(0, 0);
  lcd.print("Sistem Monitor");
  lcd.setCursor(0, 1);
  lcd.print("Tanaman");
  delay(2000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Anda Ingin Ukur");
  lcd.setCursor(0, 1);
  lcd.print("Apa?");
  delay(2000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Tekan A Untuk");
  lcd.setCursor(0, 1);
  lcd.print("Suhu");
  delay(2000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Tekan B Untuk");
  lcd.setCursor(0, 1);
  lcd.print("Kelembaban");
  delay(2000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Tekan C Untuk");
  lcd.setCursor(0, 1);
  lcd.print("Ints. Cahaya");
  delay(2000);

  lcd.clear();
}

void loop() {
  sbA = digitalRead(BUTTON_PIN_A);
  sbB = digitalRead(BUTTON_PIN_B);
  sbC = digitalRead(BUTTON_PIN_C);

  buttonStateA = sbA;
  buttonStateB = sbB;
  buttonStateC = sbC;

  if (buttonStateA == HIGH && buttonStateB == LOW && buttonStateC == LOW) { 
    float t = dht.readTemperature();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Suhu= ");
    lcd.print(t);
    lcd.print(" C");

    Serial.print("Suhu = ");
    Serial.print(t);
    Serial.println(" C");
  } else if (buttonStateA == LOW && buttonStateB == HIGH && buttonStateC == LOW) { 
    float h = dht.readHumidity();

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Lembab = ");
    lcd.print(h);
    lcd.print(" %");

    Serial.print("Kelembaban = ");
    Serial.print(h);
    Serial.println(" %");
  } else if (buttonStateA == LOW && buttonStateB == LOW && buttonStateC == HIGH) { 
    int LDRStatus = analogRead(LDRPin);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Cahaya= ");
    lcd.print(LDRStatus);

    Serial.print("Intensitas Cahaya = ");
    Serial.print(LDRStatus);
  }
  delay(70);
}