Sends sensor data and relay status from the thermostat/temperature node over the serial port.

Serial_Sensor_Demo2.ino

/*
 Demonstration sketch for the Hobbybotics Wireless Thermostat/Temperature Node.
 
 Sends sensor data and relay status over the serial port.
*/

#include <MCP23008.h>             // MCP23008 I/O Expander (I2C)
#include <LCD.h>                  // I2C LCD
#include <Wire.h>                 // I2C functions
#include <OneWire.h>              // One-wire devices
#include <DallasTemperature.h>    // DS18B20
#include <MAX6675.h>              // MAX6675 Thermocouple
#include <SHT15.h>                // SHT15 humidity/temperature sensor
#include <TEMT6000.h>             // TEMT6000 light sensor
#include <SPI.h>                  // DS3234 RTC
#include <DS3234.h>               // DS3234 RTC

/*-----------------------------------------------------------------------------------------------
 * Pin definitions
 * ----------------------------------------------------------------------------------------------*/

// Dallas DS18B20 temperature sensors
#define    DS18B20_BUS     A0     

// TEMT6000 light sensor pin
#define    TEMT6000_PIN    A1     

/*-----------------------------------------------------------------------------------------------
 * Create object references
 * ----------------------------------------------------------------------------------------------*/

// Default I2C address for LCD is 0
LCD lcd;

// Setup One-wire instance to communicate with DS18B20 sensors
OneWire  oneWire(DS18B20_BUS);

// Pass oneWire reference to DallasTemperature library
DallasTemperature  _DS18B20(&oneWire);

// Create an array for DS18B20 sensor addresses
DeviceAddress  DS18B20[3];

// Setup MCP23008 I/O Expander instance to communicate with the relays--address 2
MCP23008  relays;

// Setup MAX6675 instance to communicate with Type-K Thermocouple
MAX6675 _MAX6675;

// Setup light sensor object
TEMT6000 _TEMT6000;

// Setup SHT15 humidity/temperature sensor object
SHT15 _SHT15;

// Setup instance of DS3234 _DS3234
DS3234 _DS3234;

/*-----------------------------------------------------------------------------------------------
 * Serial packet data structure
 * ----------------------------------------------------------------------------------------------*/
 
 struct{
   int light;            // TEMT6000 measured light intensity
   int humidity;         // SHT15 humidity 0..100%
   int temperature[5];   // Celcius: SHT15, DS18B20[1..4], MAX6675
   int relays[7];        // Relay status1..7
   int date_time[5];     // DS3234 day/month/year/hour/min/sec
 } txdata;
/*-----------------------------------------------------------------------------------------------
 * LCD custom characters
 * ----------------------------------------------------------------------------------------------*/

// make a degree symbol
const char degree = 223;

/*-----------------------------------------------------------------------------------------------
 * Function: init_relays
 * Description: Initialize relays. Relays are connected to MCP23008 I/O Expander (address 2)
 * Ins: none
 * Outs: none
 * ----------------------------------------------------------------------------------------------*/
void init_relays(){
  relays.begin(2);
  
  for(int x = 0; x <= 7; x++){
    relays.pinMode(x, OUTPUT);
  }
}

/*-----------------------------------------------------------------------------------------------
 * Function: get_relay_state
 * Description: Get relay state(ON = 1/OFF = 0) 
 * Ins: Integer value for relay (0-7)
 * Outs: relay state (1 = ON, 0 = OFF)
 * ----------------------------------------------------------------------------------------------*/
int get_relay_state(int relaynum){
  return relays.digitalRead(relaynum);
}

/*-----------------------------------------------------------------------------------------------
 * Function: init_DS18B20
 * Description: Initialize DS18B20 Temperature sensor(s)
 * Ins: Integer value for sensor precision.  Can be 9, 10, 11 or 12 bits
 * Outs: none
 * ----------------------------------------------------------------------------------------------*/
void init_DS18B20(int precision){
  _DS18B20.begin();

  int available = _DS18B20.getDeviceCount();

  for(int x = 0; x <= available; x++){
    if(_DS18B20.getAddress(DS18B20[x], x)){
      _DS18B20.setResolution(DS18B20[x], precision);
    }
  }
}

/*-----------------------------------------------------------------------------------------------
 * Function: DS18B20_CELSIUS
 * Description: Get celsius reading from DS18B20 Temperature sensor
 * Ins: Integer value for sensor address
 * Outs: Returns celsius reading
 * ----------------------------------------------------------------------------------------------*/
int DS18B20_CELSIUS(int address){
  if (_DS18B20.getAddress(DS18B20[address], address)){
    _DS18B20.requestTemperatures();
    return _DS18B20.getTempC(DS18B20[address]);
  }
  else
    return 0;
}

/*-----------------------------------------------------------------------------------------------
 * Function: DS18B20_FAHRENHEIT
 * Description: Get fahrenheit reading from DS18B20 Temperature sensor
 * Ins: Integer value for sensor address
 * Outs: Returns fahrenheit reading
 * ----------------------------------------------------------------------------------------------*/
//int DS18B20_FAHRENHEIT(int address){
//  if (_DS18B20.getAddress(DS18B20[address], address)){
//    _DS18B20.requestTemperatures();
//    return DallasTemperature::toFahrenheit(_DS18B20.getTempC(DS18B20[address]));
//  }
//  else
//    return 0;
//}

/*-----------------------------------------------------------------------------------------------
 * Function: init_DS3234
 * Description: initialize the _DS3234 and check if date/time has already been set
 * Ins: none
 * Outs: none
 * ----------------------------------------------------------------------------------------------*/
void init_DS3234(){
  SPI.begin();
  _DS3234.begin();
  if (! _DS3234.isrunning()) // set _DS3234 to date & time this sketch was compiled
    _DS3234.adjust(DateTime(__DATE__, __TIME__));
}

/*-----------------------------------------------------------------------------------------------
 * Function: init_DS3234
 * Description: initialize the _DS3234 and check if date/time has already been set
 * Ins: none
 * Outs: none
 * ----------------------------------------------------------------------------------------------*/
void get_datetime(){
  DateTime now = _DS3234.now();
  
  txdata.date_time[0] = now.hour();
  txdata.date_time[1] = now.minute();
  txdata.date_time[2] = now.second();
  txdata.date_time[3] = now.day();
  txdata.date_time[4] = now.month();
  txdata.date_time[5] = now.year();
  txdata.date_time[6] = now.dayOfWeek();
}

/*-----------------------------------------------------------------------------------------------
 * Function: set_cursor
 * Description: Set LCD cursor to column and row
 * Ins: Integer value for column and row
 * Outs: none
 * ----------------------------------------------------------------------------------------------*/
void set_cursor(int col, int row){
  lcd.setCursor(col, row);
}

/*-----------------------------------------------------------------------------------------------
 * Function: print_string
 * Description: Set LCD cursor to column and row and print string
 * Ins: Integer value for column and row. Pointer to string to print
 * Outs: none 
 * ----------------------------------------------------------------------------------------------*/
void print_string(char *str, int col, int row){
  lcd.setCursor(col, row);
  lcd.print(str);
}

/*-----------------------------------------------------------------------------------------------
 * Function: print_custom_char
 * Description: Set LCD cursor to column and row and print custom LCD character
 * Ins: Integer value for column, row and address.
 * Outs: none
 * ----------------------------------------------------------------------------------------------*/
void print_custom_char(int address, int col, int row){
  lcd.setCursor(col, row);
  lcd.write(address);
}

/*-----------------------------------------------------------------------------------------------
 * Function: print_int
 * Description: Set LCD cursor to column and row and print a Integer
 * Ins: Integer value for column, row and number
 * Outs: none 
 * ----------------------------------------------------------------------------------------------*/
void print_int(int num, int col, int row){
  lcd.setCursor(col, row);
  lcd.print(num);
}

/*-----------------------------------------------------------------------------------------------
 * Function: splash_screen
 * Description: 
 * Ins: none
 * Outs: none
 * ----------------------------------------------------------------------------------------------*/
void splash_screen(){
  lcd.clear();
  print_string("Hobbybotics", 0, 0);
  print_string("Serial Sensor Test 1", 0, 1);
}

/*-----------------------------------------------------------------------------------------------
 * Main routines
 * ----------------------------------------------------------------------------------------------*/
 
void setup(){
  Serial.begin(9600);
  
  // Init LCD
  lcd.begin(20, 4);                 
  
  // Init light sensor 
  _TEMT6000.init(TEMT6000_PIN);     
  
  // Init MAX6675
  _MAX6675.init(4, 5, 6);           
  
  // Init SHT15 sensor. SDA = D16 (A2), SCL = D17 (A3)
  _SHT15.init(16, 17);              
               
  // Init relays (I2C)
  init_relays();                    
  
  // Init DS18B20 sensors with precision set to 9
  init_DS18B20(9);                  
  
  // Init DS3234
  init_DS3234();                    
  
  splash_screen();
  
  delay(3000);  
}
 
void loop(){ 
  // TEMT6000 : Light 0..100%
  Serial.print("TEMT6000: "); 
  Serial.print(txdata.light = _TEMT6000.get_lux_int());
  Serial.print("%");
  
  // SHT15 : Humidity 0..100%, Temperature Celsius
  Serial.print("   SHT15: ");
  Serial.print(txdata.humidity = _SHT15.measure(HUMI));
  Serial.print("%  ");
  
  Serial.print(txdata.temperature[0] = _SHT15.measure(TEMPC));
  Serial.write(degree);
  Serial.print("C");
  
  // DS18B20 : Temperature Celsius
  Serial.print("   DS18B20: ");
  Serial.print(txdata.temperature[1] = DS18B20_CELSIUS(0));
  Serial.write(degree);
  Serial.print("C  ");

  Serial.print(txdata.temperature[2] = DS18B20_CELSIUS(1));
  Serial.write(degree);
  Serial.print("C  ");

  Serial.print(txdata.temperature[3] = DS18B20_CELSIUS(2));
  Serial.write(degree);
  Serial.print("C  ");

//  Serial.print(txdata.temperature[4] = DS18B20_CELSIUS(3));
//  Serial.write(degree);
//  Serial.print("C");
  
  // MAX6675 : Temperature Celsius
  Serial.print("  MAX6675: ");
  Serial.print(txdata.temperature[5] = _MAX6675.measure(_MAX6675.TEMPC));
  Serial.write(degree);
  Serial.print("C");

  // Relays : 0..7
  Serial.print("   Relays: ");
  Serial.print(txdata.relays[0] = get_relay_state(0));
  Serial.print("  ");
  Serial.print(txdata.relays[1] = get_relay_state(1));
  Serial.print("  ");
  Serial.print(txdata.relays[2] = get_relay_state(2));
  Serial.print("  ");
  Serial.print(txdata.relays[3] = get_relay_state(3));
  Serial.print("  ");
  Serial.print(txdata.relays[4] = get_relay_state(4));
  Serial.print("  ");
  Serial.print(txdata.relays[5] = get_relay_state(5));
  Serial.print("  ");
  Serial.print(txdata.relays[6] = get_relay_state(6));
  Serial.print("  ");
  Serial.print(txdata.relays[7] = get_relay_state(7));
  
  // DS3234 : hh:mm:ss  dd:mm:yyyy  d
  DateTime now = _DS3234.now();
  
  Serial.print("   Time: ");
  
  // Hour
  txdata.date_time[0] = now.hour();
  
  // Pad if necessary for double-digit
  if (txdata.date_time[0] < 10)
    Serial.print("0");
  Serial.print(txdata.date_time[0]);
  
  Serial.print(":");
  
  // Minutes
  txdata.date_time[1] = now.minute();
  
  // Pad if necessary for double-digit
  if (txdata.date_time[1] < 10)
    Serial.print("0");
  Serial.print(txdata.date_time[1]);
  
  Serial.print(":");
  
  // Seconds
  txdata.date_time[2] = now.second();
  
  // Pad if necessary for double-digit
  if (txdata.date_time[2] < 10)
    Serial.print("0");
  Serial.print(txdata.date_time[2]);
   
  Serial.print(" Date: ");
  
  // Day of month
  txdata.date_time[3] = now.day();
  
  // Pad if necessary for double-digit
  if (txdata.date_time[3] < 10)
    Serial.print("0");
  Serial.print(txdata.date_time[3]);
  
  Serial.print("/");
  
  // Month
  txdata.date_time[4] = now.month();
  
  // Pad if necessary for double-digit
  if (txdata.date_time[4] < 10)
    Serial.print("0");
  Serial.print(txdata.date_time[4]);
  
  Serial.print("/");
  
  // Year
  Serial.print(txdata.date_time[5] = now.year());
  
  Serial.print("  Day: ");
  
  // Day of week
  Serial.print(txdata.date_time[6] = now.dayOfWeek());
  
  Serial.println();
  
  delay(3000);
}