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).

Hardware: -

No.	Components	Quantity
1.	Arduino Uno R3 (Master & Slave)	2
2.	LCD 16X2	1
3.	Potentiometer (250K)	2
4.	Jumper Wire	20
5.	Resistor (0.5K)	1

Code (MASTER) :-

//MASTER
#include<Wire.h>

void setup()
{
pinMode(A1, INPUT);
Serial.begin(9600);
Wire.begin();

}

void loop()
{
float value=analogRead(A1);
signed int voltage=(value*5)/1024;
// int temp=(voltage-0.5)*100;
Wire.beginTransmission(1);
Wire.write(voltage);
Wire.endTransmission();
delay(50);
}

Code (SLAVE):-

//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(ruso);
lcd.begin(16,2);
}
void loop()
{
delay(50);
}

void ruso(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\n");
//Serial.println(5);
delay(50);

}

Project Prototype :-