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

Offline Batch

Circuit Connection:

Code:

//master

#include<Wire.h>
void setup()
{
pinMode(A2, INPUT);
Serial.begin(9600);
Wire.begin(3);
}
void loop()
{
float value=analogRead(A2);
signed int v=(value*5)/1024;
Wire.beginTransmission(1);
Wire.write(v);
Wire.endTransmission();
delay(50);
}

//slave

#include<Wire.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);
void setup()
{
Serial.begin(9600);
Wire.begin(1);
Wire.onReceive(LCD);
lcd.begin(16,2);
}
void loop()
{
delay(50);
}
void LCD(int y)
{
signed int v=Wire.read();
lcd.setCursor(0,0);
lcd.print("voltage is : ");
lcd.print(v);
Serial.print("PD voltage value is\n");
Serial.println(v);
delay(1000);
}

Output: