// Libraries for the Dallas Sensor
#include <OneWire.h>
#include <DallasTemperature.h>
//Control the MAX7219 
#include "LedControl.h"

//----------------------
//to create int values from the float temperature value
#define N_DECIMAL_POINTS_PRECISION (1000) // n = 3. Three decimal points.
#define TEMPERATURE_PRECISION 12

//----------------------
// Data wire is plugged to pin 2
#define ONE_WIRE_BUS 2
// Setup a oneWire instance to communicate
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);

//remember the devices for max 5 devices
DeviceAddress term[5];

//----------------------

// add the 7 Segment LED 
// pin 12 is connected to the DataIn 
// pin 11 is connected to the CLK 
// pin 10 is connected to LOAD 
// only one MAX72xx Chip
// LedControl(dataPin,clockPin,csPin,numDevices)
LedControl seg71=LedControl(12,11,10,1);

//----------------------
// globals
float tf=0;
int integerPart = 0;
int decimalPart = 0;

//----------------------
void setup() {

  // Open serial communications
  Serial.begin(57600);  
  // wait for serial port to connect. Needed for native USB port only
  while (!Serial) {
    ; 
  }
  Serial.println("Start reading temperature");

  // Start the Dallas Library
  sensors.begin(); 
  // set to asyncron
  sensors.setWaitForConversion(false);
  //set the resolution
  sensors.setResolution(TEMPERATURE_PRECISION);

  //Power Mode
  Serial.print("Sensors Power Mode :: ");
  if ( sensors.isParasitePowerMode() ) {
      Serial.println("Parasite Power Mode");
  }
  else {
      Serial.println("Power line connected");
  }

  //show settings
  int deviceCount=sensors.getDeviceCount();

  //sensor Count
  Serial.print("Sensors :: ");
  Serial.print(deviceCount, DEC);
  Serial.println(" connected");
 
 //loop over all sensors
 for (int i=0;i<deviceCount;i++) {

   Serial.print("Sensor Device :: ");
   Serial.print(i);
   Serial.println();
    
    // get the adress of the sensor
    if (!sensors.getAddress(term[i], i)) {
        Serial.print("Unable to find address for Device");
        Serial.println(i,DEC);
    } 
    else {
       Serial.print("Sensor Device ");
       Serial.print(i,DEC);
       Serial.print(" Address is     :: ");
       printAddress(term[i]);
       Serial.println();
    }
  
    //uint8_t* deviceAddress;
    //Serial.println(sensors.getAddress(deviceAddress, 1),HEX);
    
     Serial.print(" +Resolution Byte :: ");
     Serial.println(sensors.getResolution(term[i]),DEC);
     Serial.print(" +getLowAlarmTemp :: ");
     Serial.println(sensors.getLowAlarmTemp(term[i]),DEC);
     Serial.print(" +HighAlarmTemp   :: ");
     Serial.println(sensors.getHighAlarmTemp(term[i]),DEC);
     Serial.println("-----------------------");       
  }


  //The MAX72XX is in power-saving mode on startup,
  //we have to do a wakeup call
  seg71.shutdown(0,false);  
  //Set the brightness to a medium values
  seg71.setIntensity(0,8);
  //clear the display
  seg71.clearDisplay(0);
  
}


void loop() {  
    
  Serial.println("Read tempertaur ---------------");
  sensors.requestTemperatures(); // Send the command to get temperatures
  
  //progress dots
  printProgress(30);

  int deviceCount=sensors.getDeviceCount();
  //loop over all sensors
  for (int i=0;i<deviceCount;i++) {
    // read the first sensor on the bus
    //tf =sensors.getTempCByIndex(i);
    tf =sensors.getTempC(term[i]);
    integerPart = (int)tf;
    decimalPart = ((int)(tf*N_DECIMAL_POINTS_PRECISION)%N_DECIMAL_POINTS_PRECISION);
   
    Serial.print("Sensor Device temperature ");
    Serial.print(i);
    Serial.print(" :: ");
    Serial.println(tf,4);
  
    //write to 7Segment
    seg71.clearDisplay(0);
    printDigit(integerPart,decimalPart);
    delay(3000);
  } 
}

//progress dots
void printProgress(int t){
   //progress dot's 
   seg71.clearDisplay(0);
  for (int i=0;i<9;i++){
    seg71.setChar(0,i,'.',false);
    delay(t);
  }
}

//print digits
void printDigit(int t,int p) {  
    int tones;  
    int ttens;  
    int thundreds; 

    int pones;  
    int ptens;  
    int phundreds; 

    boolean negative=false;

    if(t < -999 || t > 999)  
        return;  
    if(t<0) {  
        negative=true; 
        t=t*-1;  
    }
    
    tones=t%10;  
    pones=p%10;  
    
    t=t/10;  
    p=p/10;
    
    ttens=t%10;
    ptens=p%10;
      
    t=t/10; 
    thundreds=t;  

    p=p/10; 
    phundreds=p;
    
    if(negative) {  
        //print character '-' in the leftmost column  
        seg71.setChar(0,7,'-',false);  } 
    else {
        //print a blank in the sign column  
        seg71.setChar(0,7,' ',false);  
    }  
    
    seg71.setDigit(0,6,(byte)thundreds,false);
    seg71.setDigit(0,5,(byte)ttens,false); 
    seg71.setDigit(0,4,(byte)tones,true); 
    seg71.setDigit(0,3,(byte)phundreds,false);
    seg71.setDigit(0,2,(byte)ptens,false); 
    seg71.setDigit(0,1,(byte)pones,false);     
    seg71.setChar(0,0,'C',false);

} 


// function to print a device address
// from https://github.com/adafruit/MAX31850_DallasTemp/blob/master/examples/Multiple/Multiple.pde
void printAddress(DeviceAddress deviceAddress)
{
  for (uint8_t i = 0; i < 8; i++){
    // zero pad the address if necessary
    if (deviceAddress[i] < 16) Serial.print("0");
    Serial.print(deviceAddress[i], HEX);
  }
}