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

Master code:

#include<Wire.h>
void setup()
{
pinMode(A1, INPUT); //Potentiometer as input
Serial.begin(9600); //Serial monitor output
Wire.begin(); //I2C enable
}

void loop()
{
float value=analogRead(A1);
signed int voltage=(value*5)/1024;
/*I2C transmission*/
Wire.beginTransmission(1);
Wire.write(voltage);
Wire.endTransmission();
Serial.println(voltage);
delay(50);
}

Slave code:

#include<Wire.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2); //Enabling lcd
void setup()
{
Serial.begin(9600);
Wire.begin(1); //I2C transmission for address 1
Wire.onReceive(ruso);
lcd.begin(16,2);
}
void loop()
{
delay(50);
}

void ruso(int y)
{
int voltage=Wire.read();
lcd.setCursor(0,0); //First line od lcd
lcd.print("the voltage is"); //lcd out
lcd.print(voltage);
Serial.print("voltage value:"); //Serial monitor out
Serial.println(voltage);
delay(50);
}