How to Control Led Matrix Using Bluetooth

Hi guys!today I have created a simple project by how to control led matrix using bluetooth

Materials needed:

1)arduino(uno,mega,nano,etc.)

2)ledmatrix 8x8 3)bluetooth module(HC-05) 4)wires 5)breadboard

Here is the code:

#include<LedControl.h>

int DIN = 12;

int CS = 10;

int CLK = 11;

int row=0;

int col=0;

int temp=0;

int data=0;

LedControl lc=LedControl(DIN,CLK,CS,1);

void setup() {

lc.shutdown(0,false);

lc.setIntensity(0,5);

lc.clearDisplay(0);

Serial.begin(9600); }

void loop() {

if(Serial.available() > 0)

{ data = Serial.read();// it returns ascii value if we send one in the phone

if(data < 96)

{

if(temp==0) {

row=data-48;

temp=1; }

else

col=data-48; }

else if(data=='n') {

lc.setLed(0,row,col,true);

Serial.println('n');

Serial.println(row);

Serial.println(col);

temp=0; }

else if(data=='f') {

lc.setLed(0,row,col,false);

Serial.println('f');

Serial.println(row);

Serial.println(col);

temp=0; }

else if(data=='r') lc.clearDisplay(0); }

}

Caution:If you are uploading the code,Please unwire the rx and tx pins from arduino or it will blow

Here is the schematics

Now you can draw anything in the led matrix