Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

//MASTER

#include
#include
LiquidCrystal lcd(12,11,5,4,3,2);

void setup()
{
lcd.begin(16,2);
lcd.setCursor(0,0);
lcd.print("Project 1");
lcd.setCursor(0,1);
lcd.print("Interface LCD I2C");

for(int i = 0; i<16 ; i++)
{
lcd.scrollDisplayLeft();
delay(100);
}
delay(2000);
lcd.clear();
Serial.begin(9600);
Wire.begin();
}

void loop()
{
Wire.requestFrom(8,1);
byte MasterReceive = Wire.read();
int potvalue = analogRead(A0);

byte MasterSend = map(potvalue,0,1023,0,255);
Wire.beginTransmission(8);
Wire.write(MasterSend);
Wire.endTransmission();
lcd.setCursor(0,0);
lcd.print("Master");
lcd.setCursor(0,1);
lcd.print("Slave");
lcd.print(MasterReceive);
Serial.println("Master received from Slave");
Serial.println(MasterReceive);
delay(500);
}

//SLAVE

#include
#include
LiquidCrystal lcd(12,11,5,4,3,2);
byte SlaveReceived = 0;

void setup()
{
lcd.begin(16,2);
lcd.setCursor(0,0);
lcd.print("project 1");
lcd.setCursor(0,1);
lcd.print("I2C project");
delay(2000);
lcd.clear();
Serial.begin(9600);
Wire.begin(8);
Wire.onReceive(receiveEvent);
Wire.onRequest(requestEvent);
}

void loop(void)
{
lcd.setCursor(0,0);
lcd.print("SLAVE");
lcd.setCursor(0,1);
lcd.print("MasterVal");
lcd.print(SlaveReceived);
Serial.println("Slave received from Master");
Serial.println(SlaveReceived);
delay(500);
lcd.clear();
}

void receiveEvent(int var)
{
SlaveReceived = Wire.read();
}

void requestEvent()
{
int potvalue = analogRead(A0);
byte SlaveSend = map(potvalue,0,1023,0,255);
Wire.write(SlaveSend);
}