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

PROJECT-1

I2C communication

Aim-

Use I2C communication to send data from master to slave and print it on the LCD.

Circuit diagram-

Master code-

//Master
#include<Wire.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);
char c[11];
void setup()
{
Wire.begin();
lcd.begin(16,2);
}//setup
void loop()
{
for(int i=0;i<=12;i++)
{
char a[]="be Carefull"; //message
c[i]=a[i];
}

lcd.print(c);
Wire.beginTransmission(8); //start transmission to adress 8
Wire.write(c); //transmitt c
Wire.endTransmission(); //end transmission
delay(8000);
lcd.clear(); //clear screen
}

Slave code-

//Slave
#include<Wire.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);
char w[24];
int i=0;
void setup()
{
Wire.begin(8);
Wire.onReceive(doit); //call the function 'doit' when data is received
lcd.begin(16,2);
}//setup
void loop()
{
delay(20);
}

void doit(int howMany) //called function
{
lcd.clear();
for(i=0;i<11;i++)
{
char a=Wire.read(); //Reading the transmitted data
w[i]=a;
}//reading all the data and stored in array
lcd.print(w); //printing on screen
delay(9000);
delay(10);
}

Output-

link-

https://www.tinkercad.com/things/1ybnVFJHcwd-terrific-krunk-snicket/editel?sharecode=smiG2HfNXba50nOi-hBQDBM7uxqbCthmimajcSTXh0Q

(it may expire)