#include <U8g2lib.h>
#include <DHT.h>
#define SENSOR_TEMP 15  //fijarse bien el numero
#define LED 16
#define P1 0
#define P2 1
#define BOTON1 26
#define BOTON2 25

DHT dht(15, DHT22);
U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/U8X8_PIN_NONE);

int temp;
int umbral = 23;
int estadoActivo = P1;
char stringumbral[5];
char stringtemp[5];

void setup() {
  Serial.begin(9600);
  u8g2.begin();
  dht.begin();
  pinMode(SENSOR_TEMP, INPUT);
  pinMode(LED, OUTPUT);
}

void loop() {
  maquinaEstado();

  if (dht.readTemperature() >= umbral) {
    digitalWrite(LED, HIGH);
  } else {
    digitalWrite(LED, LOW);
  }
  delay(1000);
}

void maquinaEstado() {
  Serial.println(estadoActivo);
  switch (estadoActivo) {
    case P1:
      temp = dht.readTemperature();
      Serial.println(temp);

      u8g2.clearBuffer();  // clear the internal memory

      u8g2.setFont(u8g2_font_ncenB08_tr);  // choose a suitable font
      sprintf(stringtemp, "%d", temp);     ///convierto el valor float a string
      u8g2.drawStr(15, 20, "Temp:");
      u8g2.drawStr(70, 20, stringtemp);
      u8g2.drawStr(90, 20, "C");
      u8g2.drawStr(15, 50, "Umbral:");
      sprintf(stringumbral, "%d", umbral);  ///convierto el valor float a string
      u8g2.drawStr(70, 50, stringumbral);
      u8g2.drawStr(90, 50, "C");
      u8g2.sendBuffer();  // transfer internal memory to the display
      if (digitalRead(BOTON1) == 0 && digitalRead(BOTON2) == 0) {
        estadoActivo = P2;
      }
      break;
    case P2:
      if (digitalRead(BOTON1) == 0) {
        umbral++;
      }
      if (digitalRead(BOTON2) == 0) {
        umbral--;
      }
      if (digitalRead(BOTON1) == 0 && digitalRead(BOTON2) == 0) {
        estadoActivo = P1;
      }
      break;
  }
}