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

// Mahanmadijaj Shekh

Project Objective -

To send a meaasge from slave to master using Inter-Integrated Circuit (I2C) communication protocol in arduino and Displaying the message sent by Master and received by slave i.e. LCD display.

Circuit -

Schematic Circuit -

Code -

//MASTER
#include<LiquidCrystal.h> // Header to use LCD functions
#include<Wire.h> // Header to use I2C communication

LiquidCrystal lcd(2,3,4,5,6,7); //pins connected to LCD
char Master_Receive[16]; //String to get the message

void setup()
{
Serial.begin(9600);
Wire.begin(); //To begin I2C communication
lcd.begin(16,2);
lcd.clear();
}

void loop()
{
Wire.requestFrom(8,16); //8 address 16 characters
lcd.setCursor(0,0); //To move the cursor to the begining
lcd.print("Master"); //To print in display
lcd.setCursor(0,1); //To move the cursor to the next line
int i=0;
while(0<Wire.available()) //To check the number of bytes available
{
Master_Receive[i]=Wire.read(); //To print character by character
i++;
}
lcd.print( "MSG Received"); //To print the received message
delay(1000); //Delay for 1 second
Wire.end(); //To end the I2C transmission
}

//SLAVE
#include<LiquidCrystal.h> // Header to use LCD functions
#include<Wire.h> // Header to use I2C communication LiquidCrystal lcd(2,3,4,5,6,7);

//pins connected to LCD
void setup()
{
Serial.begin(9600);
Wire.begin(8); //To begin I2C communication
Wire.onRequest(send); //To call the send function
lcd.begin(16,2); //To start the LCD display
lcd.clear(); //To clear the display
}

void loop()
{
lcd.setCursor(0,0); //To move the cursor to the begining
lcd.print("Slave"); //To display in LCD
lcd.setCursor(0,1); //To move the cursor to the next line
lcd.println("MSG sent "); //To display in LCD
}
void send()
{
char ch[17]="Slave Message "; //creating string
Wire.write(ch); //To send message to Master
}

OUTPUT -