2013050701.c

#include <LiquidCrystal.h>

const int lightPin = A0 ; // Light Sensor Pin
const int tempPin  = A1 ; // Temperature Sensor Pin

const int lcdRSPin = 13 ; // Select Pin
const int lcdENPin = 12 ; // Enable Pin
const int lcdD4Pin = 11 ; // Databus line 4
const int lcdD5Pin =  8 ; // Databus line 5
const int lcdD6Pin =  7 ; // Databus line 6
const int lcdD7Pin =  4 ; // Databus line 7
const int lcdBLPin =  5 ; // Backlight Pin
LiquidCrystal lcd( lcdRSPin , lcdENPin , lcdD4Pin , lcdD5Pin , lcdD6Pin , lcdD7Pin ) ;

void setup() {
  
  // setup sensors
  pinMode( lightPin , INPUT ) ;
  pinMode( tempPin , INPUT ) ;
  
  // setup lcd
  lcd.begin( 8 , 2 ) ;
  
  // turn lcd backlight on
  analogWrite( lcdBLPin , 255 ) ;
  
}

void loop() {
  
  int lightAnalog = analogRead( lightPin ) ;
  int tempAnalog = analogRead( tempPin ) ;
  
  int lightPerc = map( lightAnalog , 0 , 1023 , 1 , 100 ) ;
  int tempCalc = map( tempAnalog , 0 , 1023 , 0 , 499 ) - 50 ;
  
  lcd.setCursor( 0 , 0 ) ;
  lcd.print( "L: " ) ;
  lcd.print( lightPerc ) ;
  lcd.print( "%" ) ;
  lcd.setCursor( 0 , 1 ) ;
  lcd.print( "T: " ) ;
  lcd.print( tempCalc ) ;
  lcd.print( "C" ) ;
  
  // delay 1000ms
  delay( 1000 ) ;
  
  // clear lcd
  lcd.clear() ;
  
}