Arduino 16

Arduino 8X8 LED Matrix Interface with Android Phone

Components Required

• Arduino UNO
• MAX7219 IC Board
• 8×8 LED Matrix
• HC-05 Bluetooth Module
• Android Phone with App installed

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);
	}
	}