#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>

#define Led1 14
#define Led2 4
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define DHTPIN 13
#define DHTTYPE DHT22
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET 21 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
DHT dht(DHTPIN,DHTTYPE);

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  display.begin(SSD1306_SWITCHCAPVCC,0x3C);
  display.display();
  delay(2500);
  display.clearDisplay();
  dht.begin();
  pinMode(Led1, OUTPUT);
  pinMode(Led2, OUTPUT);
}

void loop() {
  sendSensorData();
  // put your main code here, to run repeatedly:
}
void sendSensorData(){
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  if(isnan(h)||isnan(t)){
    Serial.print("Fail to reead from DHT sensor");
    delay(1000);
    return;
  }
  
  display.setTextColor(WHITE);
  display.setTextSize(1.5);
  display.setCursor(13,0);
  display.print("Controller system");

  //Humidity monitor//
  display.setTextSize(1);
  display.setCursor(0,10);
  display.print("Hum.  --> ");//Humidity data//
  display.print(h);
  display.println("%");
  //Temperature Monnitor//
  display.setCursor(0,20);
  display.print("Temp. --> ");//Temperature data//
  display.print(t);
  display.print("^C");

  //Make editor//
  display.setTextSize(1);
  display.setCursor(0,55);
  display.print(".Edit by Wachira_aote.");
  if (t<=25){
    digitalWrite(Led1, HIGH);
    digitalWrite(Led2, LOW);
    display.setTextSize(1);
    display.setCursor(0,30);
    display.print("Led1 : On");
    display.setCursor(0,40);
    display.print("Led2 : Off");
  }
  else{
    digitalWrite(Led1, LOW);
    digitalWrite(Led2, HIGH);
    display.setTextSize(1);
    display.setCursor(0,30);
    display.print("Led1 : Off");
    display.setCursor(0,40);
    display.print("Led2 : On");
  }
  display.display();
  delay(100);
  display.clearDisplay();
  
  Serial.print(h);Serial.println("%");
  Serial.print(t);Serial.println("^C");
}