This will teach you how to control individual led in 8X8 LED MATRIX using Android App. Video Link COMPONENTS REQUIRED 1. 8X8 LED MATRIX 2. Breadboard 3. Arduino Nano 4. Connecting Wires 5. Bluetooth HC-05 CONNECTION Connect as given in circuit Diagram ARDUINO Code #include <Led.h> int DIN = 2; int CS = 3; int CLK = 4; 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(); Serial.print(data);// 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')