#include <dht.h>
#include <U8g2lib.h>
#include <Wire.h>
#include <Arduino.h>
#define SLAVE_ADDRESS 0x0b

dht DHT;

#define DHT11_PIN 9

const int red = 7;
const int green = 6;
const int yellow = 5;

// U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE, /* clock=*/ A5, /* data=*/ A4);

void setup(){
  
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(yellow, OUTPUT);
  Serial.begin(9600);
  // u8g2.begin();
  Wire.begin(SLAVE_ADDRESS);
  Wire.onRequest(sendtemperature);
}

float temperature(uint16_t pin){
  float temp = 0;
  int chk = DHT.read11(pin);
  temp = DHT.temperature;
  return  temp;
}

float humidity(uint16_t pin){
  float hum = 0;
  int chk = DHT.read11(pin);
  hum = DHT.humidity;
  return hum;
}
void set_state(uint8_t state){
    digitalWrite(green,0);
    digitalWrite(red,0);
    digitalWrite(yellow,0);
  switch (state){
    case 0: digitalWrite(green,1); break;
    case 1: digitalWrite(red,1); break;
    case 2: digitalWrite(yellow,1); break;
   default:;
  }
  
}

void print4plotter(float temp,float hum){
  Serial.print("Temperatur:");
  Serial.print(temp);
  Serial.print(", Humidity:");
  Serial.println(hum);
}

/*
void print_screen_temp(float temp){
  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_unifont_t_symbols);
  u8g2.setFontRefHeightExtendedText();
  u8g2.setDrawColor(1);
  u8g2.setFontPosTop();
  u8g2.setFontDirection(0);
  u8g2.drawStr( 0, 0, "Temperatur:");
  char buff[6];
  dtostrf(temp, 4, 2, buff);
  u8g2.drawStr( 0, 18, buff);
  u8g2.drawUTF8(40, 18, "°C");
  u8g2.sendBuffer();
}

void print_screen_hum(float hum){
  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_unifont_t_symbols);
  u8g2.setFontRefHeightExtendedText();
  u8g2.setDrawColor(1);
  u8g2.setFontPosTop();
  u8g2.setFontDirection(0);
  u8g2.drawStr( 0, 0, "Humidity:");
  char buff[6];
  dtostrf(hum, 4, 2, buff);
  u8g2.drawStr( 0, 18, buff);
  u8g2.drawUTF8(40, 18, "%");
  u8g2.sendBuffer();
}
*/

uint8_t converttemp(float temp){
  temp += 75;
  return round(temp);  
}
float gtemp = 0;

void sendtemperature(){
  uint8_t dat = converttemp(gtemp);
  Wire.write(dat); 
}
uint32_t d_state = 0;
uint32_t display_time=10000;
uint32_t messure_time=100;
void loop() {
  for (int i=0; i< display_time/messure_time; i++){
  float temp=temperature(DHT11_PIN);
  float hum= humidity(DHT11_PIN);
  print4plotter(temp,hum);
  gtemp = temp;
  if (temp<=0) set_state(0); // green
  else if (temp <=40) set_state(2); // yellow
  else set_state(1); // red
  //if (d_state % 2) print_screen_temp(temp);
  //else print_screen_hum(hum); 
  delay(messure_time);
  }
  d_state ++;
}