//Prototype Program siram tanaman otomatis
// inisialisasi & pengalamatan dht
#include <DHT.h>
#define DHTTYPE DHT22
#define DHTPIN 4
#include <Adafruit_SSD1306.h>
DHT dht (DHTPIN, DHTTYPE);
#include <Wire.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

int relay = 3; 

void setup() {
  pinMode(relay, OUTPUT);
Serial.begin(9600);
dht.begin();
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
 display.setTextSize(1);
  display.setTextColor(WHITE);
  display.clearDisplay();
 
}

void loop() {
//dht
delay(2000);
float temperature = dht.readTemperature();
 float humidity = dht.readHumidity();

// Cek pembacaan kelembapan
  if (!isnan(temperature) && !isnan(humidity)) {
    // Print the temperature and humidity values to the serial monitor
    Serial.print("Temperature (°C): ");
    Serial.println(temperature);
    Serial.print("Humidity (%): ");
    Serial.println(humidity);
  } else {
    // If there was an error reading data from the sensor, print an error message
    Serial.println("Error reading from DHT sensor");
  }
   
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 0);
  // Display static text
  display.println("Temp:");
  display.setCursor(65, 0);
  display.print(temperature);
  display.display();

  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 10);
  // Display static text
  display.println("Humi:");
  display.setCursor(65, 10);
  display.print(humidity);
  display.display();
  
//perintah untuk kondisi eksternal,jika kelembapan tidak terpenuhi

//Kelembapan kurang dari 65%
if ((humidity <=65)){
  digitalWrite(relay, HIGH);
  
    display.setCursor(30 ,25);
    display.println("Tanah Kering");
    display.setCursor(30, 40);
    display.print("Spray ON!");
    display.display();
  }

//Kelembapan 80 %
if ((humidity >=80)) {
digitalWrite(relay, LOW);
   
    display.setCursor(30 ,25);
    display.println("Tanah Basah");
    display.setCursor(30 ,35);
    display.print("Spray OFF");
     display.setCursor(20 ,50);
    display.println("HIGH HUMIDITY!");
     display.display();
  }
  display.clearDisplay();
}