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

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

Objective: To send a message from slave to master using Inter-Integrated Circuit (I2C) communication protocol in arduino and display the message on 16*2 LCD screen.

//MASTER

#include //(Header for starting I2C communication protocol)

void setup()

{

pinMode(A1, INPUT); //(A1 pin is configured as input )

Serial.begin(9600); //(No. of bits transmitting per second)

Wire.begin(); //(To begin I2Cprotocol)

}

void loop()

{

float value=analogRead(A1); // reads the value from A1 pin

signed int voltage=(value*5)/1024;

// int temp=(voltage-0.5)*100;

Wire.beginTransmission(1); //Communication to be started

Wire.write(voltage); // writing down the voltage what we got

Wire.endTransmission(); // communication to be ended here

delay(50); // time delay

}

//SLAVE

#include<Wire.h> //header file for i2C communication

#include<LiquidCrystal.h> // header file for LCD display

LiquidCrystal lcd(12,11,5,4,3,2); //pins connected to LCD display

void setup()

{

Serial.begin(9600); // no. of bits transmitting per second

Wire.begin(1); //to begin with I2c protocol

Wire.onReceive(ruso); // request call to receive data

lcd.begin(16,2); //LCD initialization

}

void loop()

{

delay(50);

}

void ruso(int y)

{

signed int voltage=Wire.read(); //voltage captured

lcd.setCursor(0,0); // to set cursor position

lcd.print("the voltage is");

//lcd.setCursor(0,1);

lcd.print(voltage);

//Serial.print("voltage value\n");

//Serial.println(5);

delay(50);

}

OUTPUT ATTACHED BELOW IN FORM OF SCREENSHOT:

SCREENSHOT-1 CIRCUIT DIAGRAM CONNECTION BELOW:

SCREENSHOT-2 SHOWING CIRCUIT DIAGRAM WITH MASTER CODE:

SCREENSHOT-3 SHOWING CICUIT DIAGRAM WITH SLAVE CODE:

SCREENSHOT-4 GIVES OUTPUT: