// Sketch to read temperature and altitude values and display them on an LCD. 
// 
// email: thomas@xief.net
// projects.xief.net

// BMP085 code from Adafruit: https://github.com/adafruit/Adafruit-BMP085-Library
// Connect VCC of the BMP085 sensor to 3.3V (NOT 5.0V!)
// Connect GND to Ground
// Connect SCL to i2c clock - on '168/'328 Arduino Uno/Duemilanove/etc thats Analog 5
// Connect SDA to i2c data - on '168/'328 Arduino Uno/Duemilanove/etc thats Analog 4
#include "Wire.h"
#include "BMP085.h"
BMP085 bmp;
 

#include <OneWire.h> // One-wire devices
#include <DallasTemperature.h> // DS18B20
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 
// code for DS18B20 taken from https://gist.github.com/brooksware2000/3628594 
#define DS18B20_BUS  10// Dallas DS18B20 temperature sensors
 
 



//set up temp sensor
OneWire oneWire(DS18B20_BUS);    // Setup One-wire instance to communicate with DS18B20 sensors
DallasTemperature temperatureSensors(&oneWire);     // Pass oneWire reference to DallasTemperature library
DeviceAddress DS18B20[3];   // Create an array for DS18B20 sensor addresses


const char degree = 223; // Degree symbol

byte snowflake[8] = {
  B00000,
  B10001,
  B01010,
  B00100,
  B11111,
  B00100,
  B01010,
  B10001,
};


void setup()
{
// Initialize DS18B20 temperature sensors with precision set to 9
INIT_DS18B20(12);

lcd.createChar(0, snowflake);
lcd.begin(16, 2);
Serial.begin(9700);
bmp.begin(BMP085_HIGHRES); //ULTRAHIGHRES does not work
lcd.setCursor(0,0);
lcd.print("Gentlemen start");
lcd.setCursor(0,1);
lcd.print("your engines.");
delay(5000);
lcd.clear();
}

 
void loop()
{
// Read values from the sensor at address 0
float tempOUT = DS18B20_CELSIUS(0);
 
//read data from pressure sensor
float tempIN = bmp.readTemperature();
float altitude = bmp.readAltitude(); //101325 is sealevel pressure
    
Serial.println();
Serial.println(tempOUT);
Serial.println(tempIN);
Serial.println(altitude);


//Serial.println("C     ");
//Serial.setCursor(10, 2);
 
 
 
 

lcd.setCursor(0, 0);
lcd.print("O:");
lcd.print(tempOUT,1);
lcd.print("C   ");

lcd.setCursor(7,0);
lcd.print("  I:");
lcd.print(tempIN,1);
lcd.print("C   ");

lcd.setCursor(0,1);
lcd.print("Alt:");
lcd.print(altitude,0);
lcd.print("m   ");


lcd.setCursor(15,1);
if (tempOUT < 4) {
lcd.write(byte(0));
}
else {
 lcd.write(" "); 
}
 
delay(1000);
}


 

 
/*-----------------------------------------------------------------------------------------------
* Function: INIT_DS18B20
* Description: Initialize DS18B20 Temperature sensor(s)
* Ins: Integer value for sensor precision. Can be 9, 10, 11 or 12 bits

* ----------------------------------------------------------------------------------------------*/
void INIT_DS18B20(int precision)
{
temperatureSensors.begin();
 
int available = temperatureSensors.getDeviceCount();
 
for(int x = 0; x!= available; x++)
{
if(temperatureSensors.getAddress(DS18B20[x], x))
{
temperatureSensors.setResolution(DS18B20[x], precision);
}
}
}
 
/*-----------------------------------------------------------------------------------------------
* Function: DS18B20_CELSIUS
* Description: Get celsius reading from DS18B20 Temperature sensor
* ----------------------------------------------------------------------------------------------*/
float DS18B20_CELSIUS(int address)
{
if (temperatureSensors.getAddress(DS18B20[address], address))
{
temperatureSensors.requestTemperatures();
return temperatureSensors.getTempC(DS18B20[address]);
}
else
return 0;
}