/*
 * Coke Bottle Head
 * Photocell Values on LED
 * by John Douglas
 * 
 */
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

//PhotoResistor Pin
int PCPin0 = 0; //the analog pin the photoresistor is 
int PCPin1 = 1; //connected to
int PCPin2 = 2; //the photoresistor is not calibrated to any units so
                //this is simply a raw sensor value (relative light)

int LED1 = 7;
int LED2 = 8;

LiquidCrystal_I2C lcd(0x27,16,2); //Connect SDA (Rightmost, #4) to Analog 4, and SCL (#3) to Analog 5

void setup()
{
  pinMode(LED1, OUTPUT); //sets the led pin to output
  pinMode(LED2, OUTPUT); //sets the led pin to output
  
  lcd.init();                      // initialize the lcd 
  lcd.backlight();
  lcd.print("Coke Bottle Head");
  lcd.setCursor(0, 1);
  lcd.print("by John Douglas");
  delay(1000);
  
}
 /*
 * loop() - this function will start after setup 
 * finishes and then repeat
 */
void loop()
{
 int lightLevel0 = analogRead(PCPin0);
 int lightLevel1 = analogRead(PCPin1);
 int lightLevel2 = analogRead(PCPin2);
 
 
 //Map input value (0-900) to 0-100
 int mapLL0 = map(lightLevel0, 0, 1023, 0, 100); 
 int mapLL1 = map(lightLevel1, 0, 1023, 0, 100); 
 int mapLL2 = map(lightLevel2, 0, 1023, 0, 100); 

 mapLL0 = constrain(mapLL0, 0, 100);
 mapLL1 = constrain(mapLL1, 0, 100);
 mapLL2 = constrain(mapLL2, 0, 100);
 
 
 //lcd.clear();
 lcd.scrollDisplayLeft();
 lcd.setCursor(0, 0);
 lcd.print("PC1:");
 lcd.print(lightLevel0);
 lcd.print("  PC2:");
 lcd.print(lightLevel1);
 lcd.print("  PC3:");
 lcd.print(lightLevel2);
 lcd.setCursor(0, 1);
 lcd.print("MP1:");
 lcd.print(mapLL0);
 lcd.print("MP2:");
 lcd.print(mapLL1);
 lcd.print("MP3:");
 lcd.print(mapLL2);
delay(100);
}