#include <OneWire.h>
#include <DallasTemperature.h>
// Data wire is plugged into pin 2 on the Arduino
#define ONE_WIRE_BUS 2
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

#include "LedControl.h" //  need the library
LedControl lc=LedControl(12,11,10,2); //

// pin 12 is connected to the MAX7219 pin 1
// pin 11 is connected to the CLK pin 13
// pin 10 is connected to LOAD pin 12
// 1 as we are only using 1 MAX7219, 2 is 2xMAX...

int teplota = 30;
byte a;
byte segment1;
byte segment2;
byte znak[8];
unsigned int jas = 15;
unsigned int jas_old = 15;
byte pin_aud = 8;
unsigned int ton1 = 3000;

// definování znaků
byte nula[8] = {B00111100,
                B01000010,
                B01000010,
                B01000010,
                B01000010,
                B01000010,
                B01000010,
                B00111100,};

byte jedna[8] = {0x08,
                 0x18,
                 0x28,
                 0x08,
                 0x08,
                 0x08,
                 0x08,
                 0x08,};

byte dva[8] = {0x3C,
               0x42,
               0x02,
               0x04,
               0x18,
               0x20,
               0x42,
               0x7E,};

byte tri[8] = {0x3C,
               0x42,
               0x02,
               0x1C,
               0x02,
               0x02,
               0x42,
               0x3C,};

byte ctyri[8] = {0x08,
                 0x18,
                 0x28,
                 0x48,
                 0x7E,
                 0x08,
                 0x08,
                 0x08,};

byte pet[8] = {0x7E,
               0x40,
               0x40,
               0x7C,
               0x02,
               0x02,
               0x42,
               0x3C,};

byte sest[8] = {0x3C,
               0x40,
               0x40,
               0x7C,
               0x42,
               0x42,
               0x42,
               0x3C,};

byte sedum[8] = {0x7E,
               0x42,
               0x04,
               0x04,
               0x08,
               0x10,
               0x10,
               0x20,};

byte osum[8] = {0x3C,
               0x42,
               0x42,
               0x3C,
               0x42,
               0x42,
               0x42,
               0x3C,};

byte devet[8] = {0x3C,
               0x42,
               0x42,
               0x3C,
               0x02,
               0x02,
               0x42,
               0x3C,};

void setup()
{
  jas = analogRead(A0);
  jas = 15-(jas/68);
  lc.shutdown(0,false);// turn off power saving, enables display
  lc.setIntensity(0,jas);// sets brightness (0~15 possible values)
  lc.clearDisplay(0);// clear screen
  lc.shutdown(1,false);// turn off power saving, enables display
  lc.setIntensity(1,jas);// sets brightness (0~15 possible values)
  lc.clearDisplay(1);// clear screen
  sensors.begin();
  Serial.begin(9600);
}

void loop()
{
  // Nastavení jasu disp.
  jas = analogRead(A0);
  jas = 15-(jas/68);
  if (jas != jas_old) {
  lc.setIntensity(0,jas);// sets brightness (0~15 possible values)
  lc.setIntensity(1,jas);// sets brightness (0~15 possible values)
  jas_old =jas;
  }

   sensors.requestTemperatures();
   teplota = sensors.getTempCByIndex(0);

   if (teplota < 0) teplota = 0;
   if (teplota > 99) teplota = 99;

if (teplota > 29 || teplota == 0) {

   segment1 = teplota / 10;
   segment2 = teplota - (segment1*10);

   // Zápis segmentu 1
   if (segment1 == 0) memcpy( znak, nula, 8);
   if (segment1 == 1) memcpy( znak, jedna, 8);
   if (segment1 == 2) memcpy( znak, dva, 8);
   if (segment1 == 3) memcpy( znak, tri, 8);
   if (segment1 == 4) memcpy( znak, ctyri, 8);
   if (segment1 == 5) memcpy( znak, pet, 8);
   if (segment1 == 6) memcpy( znak, sest, 8);
   if (segment1 == 7) memcpy( znak, sedum, 8);
   if (segment1 == 8) memcpy( znak, osum, 8);
   if (segment1 == 9) memcpy( znak, devet, 8);
   for (byte row=0; row <= 7; row++){
     for (byte col=0; col <= 7; col++){
       lc.setLed(0,col,row, bitRead(znak[row], col));
     }
   }

   // Zápis segmentu 2
   if (segment2 == 0) memcpy( znak, nula, 8);
   if (segment2 == 1) memcpy( znak, jedna, 8);
   if (segment2 == 2) memcpy( znak, dva, 8);
   if (segment2 == 3) memcpy( znak, tri, 8);
   if (segment2 == 4) memcpy( znak, ctyri, 8);
   if (segment2 == 5) memcpy( znak, pet, 8);
   if (segment2 == 6) memcpy( znak, sest, 8);
   if (segment2 == 7) memcpy( znak, sedum, 8);
   if (segment2 == 8) memcpy( znak, osum, 8);
   if (segment2 == 9) memcpy( znak, devet, 8);
   for (byte row=0; row <= 7; row++){
     for (byte col=0; col <= 7; col++){
       lc.setLed(1,col,row, bitRead(znak[row], col));
     }
   }
}
else {
  lc.clearDisplay(0);// clear screen
  lc.clearDisplay(1);// clear screen
  lc.setLed(1,0,7,1);
}

// --- signalizace přehřátí ------------------------
 if (teplota > 85) {
   for(a=0; a<3; a++) {
     tone(pin_aud, ton1, 100);
     delay(200);
   }
   for(a=0; a<3; a++) {
     tone(pin_aud, ton1, 300);
     delay(400);
   }
   for(a=0; a<3; a++) {
     tone(pin_aud, ton1, 100);
     delay(200);
   }
   noTone(pin_aud);
 }

   delay(5000);
}