#include <LiquidCrystal.h> 

int sensorPin = A0;    					// select the input pin for the potentiometer
int sensorValue = 0;  					// variable to store the value coming from the sensor

LiquidCrystal lcd(2, 3, 10, 11, 12, 13);// Pinout, RS=2, E=3, DB4=10, DB5=11, DB6=12, DB7=13
int numRows = 2;						// Number of rows of the LCD
int numCols = 16;						// Number of Columns of the LCD
 
void setup()							// We write the initial configuration of our program.
{

  lcd.begin(numRows, numCols);			// Allocates or initializes the number of rows and columns of the LCD.
  lcd.clear();							// Clean the LCD screen
  lcd.setCursor(0,0);					// Place the cursor at column 0, row 0.
  lcd.print("*    Arduino   *");		// Write on the screen that is indicated between quotes.
  lcd.setCursor(0,1);					// Place the cursor at column 0, row 1.
  lcd.print("*   Professor  *"); 		// Write on the screen that is indicated between quotes.
 
  delay(2000);							// Wait 2 seconds.
  
  lcd.clear();  						// Clean the LCD screen
  lcd.setCursor(0,0);					// Place the cursor at column 0, row 0.
  lcd.print("*  LCD Screen  *");		// Write on the screen that is indicated between quotes.
  lcd.setCursor(0,1);					// Place the cursor at column 0, row 1.
  lcd.print("* ADC Exercise *"); 		// Write on the screen that is indicated between quotes.
 
  delay(2000);							// Wait 2 seconds.
  lcd.clear();  						// Clean the LCD screen

}
 
void loop()
{
  										// Read the value from the sensor:
  sensorValue = analogRead(sensorPin);  // Reads the voltage on the corresponding pin and converts it into a digital value.
  										// which is stored in the variable "sensorValue".
  lcd.setCursor(0,0);					// Place the cursor at column 0, row 0.
  lcd.print("  A0 pin value: "); 		// Write on the screen that is indicated between quotes.
  lcd.setCursor(7,1);					// Place the cursor at column 7, row 1.
  lcd.print(sensorValue);				// It is written on the screen indicated between quotes.
  delay(100);							// Wait 50 milliseconds.	
  lcd.setCursor(7,1);					// Place the cursor at column 7, row 1.
  lcd.print("    "); 					// Clear LCD screen on the (7,1) position.

  }