/*
Temperature proof of concept.
Using a LM35 and Arduino to read Temp to LCD.
Eventual use for weather station and/or home automation routines.
Need to redesign to eliminate useage of delay()
Author:  Brutus 
 */

#define ledPin 13                // LED connected to digital pin 13
#define lm35 0                   // LM35 on Analog 0

//Defines will use less memory.  Not as crucial here, but future sketches.

void sendlcd(byte command)  //Quick function to send LCD commands.
{
  Serial.print(command, BYTE);
}


void setup()                    // run once, when the sketch starts
{
  analogReference(INTERNAL);
  pinMode(ledPin, OUTPUT);      // sets the digital pin as output
  pinMode(lm35, INPUT);
  digitalWrite(ledPin, HIGH);
  digitalWrite(lm35, LOW);
  delay(1000);
  
  Serial.begin(9600);  
  delay(1000);  //Let Ports Stabilize
  //Reset Command For LCD
  sendlcd(27);
  sendlcd(122);
  
  delay(500); //Full Reset takes a bit
  
  //Backlight Command For LCD
  sendlcd(27);
  sendlcd(42);
  sendlcd(75);
  delay(50);  
  
  //Clear and Go Home on LCD
  sendlcd(254);
  sendlcd(1);
  digitalWrite(ledPin, LOW);    
  delay(250);
}

void loop()                     // run over and over again
{
  long temp;
  long temp1;
  long temp2;
  long temp_x;
  int lm35_val=0;
  
  digitalWrite(ledPin,HIGH);
  delay(500); //After digital write, delay to allow stabilized analog read
  lm35_val=analogRead(lm35);
  //temp = ((long)lm35_val*1100/1024);
  // Above changed.. using internal ref the read value seems closer to the truth
  temp = lm35_val;
  temp1=temp/10;
  temp2=temp%10;
  
  if (temp2 >= 5)
  {
    temp_x++;
  }
  
  //Clear LCD Screen
  sendlcd(254);
  sendlcd(1);
  //Print Obligitory Message
  Serial.println("brutusweb.com");
  //Print Temp
  Serial.print(temp1);
  Serial.print(".");
  Serial.print(temp2);
  sendlcd(223);
  Serial.print("C");
  
  digitalWrite(ledPin,LOW);
  delay(9500);
}