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

Master:

#include<Wire.h> //Library for I2C Communication functionsvoid setup()
{
pinMode(A0, INPUT); // connect input as a potentiometer
Serial.begin(9600);
Wire.begin(); //I2C communication

}

void loop()
{
float reading=analogRead(A0);
float voltage=reading*(5.0/1024.0);
signed int temp=(voltage-0.5)*100;
Wire.beginTransmission(1);
Wire.write(temp);
Wire.endTransmission();
delay(50);
}

Slave:

#include<Wire.h>
#include<LiquidCrystal.h> //Library for I2C Communication functions
LiquidCrystal lcd(12,11,5,4,3,2); //Define LCD Module Pins (RS,EN,D4,D5,D6,D7)
void setup()
{
Serial.begin(9600);//Begins Serial Communication at 9600 baud rate
Wire.begin(1);
Wire.onReceive(LCD); // LCD desplay write
lcd.begin(16,2);
}
void loop()
{
delay(50);
}

void LCD(int y)
{

signed int temp=Wire.read();
lcd.setCursor(0,0);
lcd.print("the temp is");
lcd.setCursor(0,1);
lcd.print(temp);
lcd.print("\xC2\xB0");
Serial.print("temperature value in temp\n");
Serial.println(temp);
delay(50);

}