FRIDGE MONITORING PROJECT

#include "liquidcrystal_i2c.h"
#include "onewire.h"
#include "dallastemperature.h"

LiquidCrystal_I2C lcd(0x27,16,2);

#define ONE_WIRE_BUS 2

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
 
unsigned long currentTime;
unsigned long cloopTime;

union {
  float fVal;
  byte bVal[4];  
}float32Bytes;

byte serBuffer[4];
byte serBuffer2[4];
float tempNormalize;

void setup()
{
   pinMode(anlogOut,OUTPUT);
   
   lcd.init();
   lcd.backlight();
   lcd.setCursor(0,0);
    
   Serial.begin(9600);

   currentTime = millis();
   cloopTime = currentTime;

   //Start up library
   sensors.begin();
}
void loop ()
{
    
    // call sensors.requestTemperatures() to issue a global temperature   
    // request to all devices on the bus  
    sensors.requestTemperatures(); // Send the command to get temperatures  
    
    float tempC = sensors.getTempCByIndex(0);
 
   currentTime = millis();
   if(currentTime >= (cloopTime + 5000))
   {
      cloopTime = currentTime; // Updates cloopTime     
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("Temp:  ");
      lcd.print(tempC); // Print litres/hour
      lcd.print(" deg");

      float32Bytes.fVal=tempC;
      
      Serial.write("s");
      Serial.write(float32Bytes.bVal[0]);
      Serial.write(float32Bytes.bVal[1]);
      Serial.write(float32Bytes.bVal[2]);
      Serial.write(float32Bytes.bVal[3]);
      Serial.write(-1);
      delay(100);
      Serial.flush();
      
   }
}

/*
 * Project FreezerMonitor
 * Description:
 * Author:
 * Date:
 */
char* buffer;
float temp;
float prevReportedValue=999.0;
unsigned long oldTime=0;
byte serBuffer[4];
// setup() runs once, when the device is first turned on.
void setup() {
  Serial.begin();
  Serial1.begin(9600);
  // Put initialization like pinMode and begin functions here.

}

// loop() runs over and over again, as quickly as it can execute.
void loop() {
  // The core of your code will likely live here.
  //Serial.println("Attempting Serial Read");
  bool serialSucces=false;
   if (Serial1.available()>0)
      {
        char cStart=(char)Serial1.read();
        //Serial.print("Start = ");
        //Serial.println(cStart);       
        if (cStart=='s')
        {
          int iCnt=0;
          byte next = Serial1.read();
          while ((Serial1.available()>0)&&(iCnt<4)&&(char)next!=-1)
          {     
            //Serial.print("Available =");
            //Serial.println(Serial1.available());                  
            serBuffer[iCnt]=next;            
            next = Serial1.read();
            iCnt++;
          }   
          serialSucces=true;         
        }
        else
        {
          Serial1.flush();
        }
      }
      Serial1.flush();

      float tempf;
      memcpy(&tempf, &serBuffer, sizeof(tempf));
      if (serialSucces)
      {
        if (prevReportedValue==999.0)
        {          
          prevReportedValue=tempf;
        }
        else
        {
          if (((tempf-prevReportedValue)>0.5) || ((tempf-prevReportedValue)<-0.5))
          {
            prevReportedValue=tempf;
            Particle.publish("Freeser Temperature",(String)tempf,PUBLIC);
          }
          else
          {
            //prevReportedValue=tempf;
            if ((oldTime+120000)<millis())
            {
              oldTime=millis();
              Particle.publish("Freeser Temperature",(String)tempf,PUBLIC);
            }
          }
        }          
      }
      
      //Serial.println(tempf);
      delay(100);
}