#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.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)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define SENSOR_TEMP_1  4
#define SENSOR_TEMP_2   2

#define SENSOR_MOV  12
#define LED 13

int temp_1 = 0;
int temp_2 = 0;

double temp = 0;
double voltage = 0;
double Rt = 0;
double tempK = 0;
double tempC = 0;

int mov = 0;
int movState = LOW;             // we start, assuming no motion detected

String interp_mov = "Motion not detected";
String ar_cond = "Ar condicionado OFF";

String interp_temp = "";
String temp_arcond = "";

void setup() {
  Serial.begin(115200);
  pinMode(LED, OUTPUT); 
  digitalWrite(LED, 0);

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  delay(2000);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 10);


}

void loop() {
  display.clearDisplay();
  display.setCursor(0,0);             
  temperature(); //10 em 10 min medir a temperatura
  motion();  //sp que ha 1 mov garantir q o ar cond funciona durante + 30min
//criar um contador para o ar cond ficar igado durante 30min e so dps verificar o mov outra vez

  if(tempC >= 25){
    interp_temp = "calor";
    Serial.println(interp_temp);
  }
  else if(tempC > 15 && tempC < 25){
    interp_temp = "normal";
    Serial.println(interp_temp);
  }
  else if(tempC <= 15){
    interp_temp = "frio";
    Serial.println(interp_temp);
  }

 
  if(interp_mov == "Motion detected!")
    ar_cond = "Ar condicionado ON";
  else
     ar_cond = "Ar condicionado OFF";

  if(ar_cond == "Ar condicionado ON" && interp_temp == "frio" )
    temp_arcond = "Aumentar a temperatura";
  else if(ar_cond == "Ar condicionado ON" && interp_temp == "calor" )
    temp_arcond = "Diminuir a temperatura";
  else 
    temp_arcond = "";

  display.print("{ Temperatura:");
  display.println(tempC);
  display.println(interp_temp);
  display.print("movimento:");
  display.println(interp_mov);
  display.print("Ar condicionado:");
  display.println(ar_cond);
  display.print(temp_arcond);
  display.println("}");
  display.display();
  delay(5000);
}

double temperature(){

  temp_1 = analogRead(SENSOR_TEMP_1);
  temp_2 = analogRead(SENSOR_TEMP_2);                         //read ADC pin

  temp = (temp_1+temp_2)/2;

  voltage = (float)temp / 4095.0 * 3.3;                // calculate voltage
  Rt = 10 * voltage / (3.3 - voltage);                     //calculate resistance value of thermistor
  tempK = 1 / (1 / (273.15 + 25) + log(Rt / 10) / 3950.0); //calculate temperature (Kelvin)
  tempC = tempK - 273.15;                                  //calculate temperature (Celsius)

  Serial.printf("tempC: %.2f\n", tempC);
  return (tempC);

}

String motion(){
   mov = analogRead(SENSOR_MOV);
  if (mov == 4095) {            // check if the input is HIGH
    digitalWrite(LED, HIGH);  // turn LED ON
    if (movState == LOW) {
      // we have just turned on
      interp_mov = "Motion detected!";
      
      Serial.println(interp_mov);
      

      // We only want to print on the output change, not state
      movState = HIGH;
    }
  } else {

    digitalWrite(LED, LOW); // turn LED OFF
    if (movState == HIGH) {
      // we have just turned of
      interp_mov = "Motion not detected!";
      Serial.println(interp_mov);
      // We only want to print on the output change, not state
      movState = LOW;
    }
  }
  
  return interp_mov;
}