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

Overview of the Project:

In this project implementing the Code for “Interfacing a 16*2 LCD with two Arduino’s (one for Master and one for Slave) using Inter-Integrated Circuit (I2C) communication protocol” by sending the message to LCD using I2C communication protocol and display the message on LCD screen.

Goals:

• Communication between Arduino and 16*2 LCD using I2C protocol.
• Displaying the message sent by Master and received by slave i.e. LCD display.

Key Highlights of the Project:

• Using the inter-integrated circuit communication protocol, transferring the data i.e. the message we want to display is sent to the LCD.
• Two Arduino’s connected to the LCD display and the communication is executed using I2C protocol between Arduino and the LDC display.

Deliverables of this project:

• Communication between the Arduino’s and LCD using I2C.
• The message passed from master to slave and displayed on the 16*2 LCD.

Expected Outcomes:

• Students will get the Knowledge of I2C communication Protocol and the Arduino.
• The Hardware connection of all components used in this project.
• Displaying the message sent by master (Arduino) and received by the slave (16*2 LCD display).

master sent voltage variation and recevied by the slave (16*2 LCD display).

//MASTER node code:-

#include<Wire.h> //Library for I2C Communication functions

void setup()
{
pinMode(A0, INPUT); // connect input as a potentiometer
Serial.begin(9600);
Wire.begin(); //I2C communication

}

void loop()
{
float value=analogRead(A0);
signed int voltage=(value*50)/1024;

Wire.beginTransmission(1);
Wire.write(voltage);
Wire.endTransmission();
delay(50);
}

//SLAVE node code

#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 voltage=Wire.read();
lcd.setCursor(0,0);
lcd.print("the voltage is");
lcd.setCursor(0,1);
lcd.print(voltage);
Serial.print("voltage value in Volt\n");
Serial.println(voltage);
delay(50);

}