Drive Arduino Robot over Bluetooth with Android App

• Any of the following Arduino Bluetooth modules will work.

 JY-MCU Linvor 

HC-05

HC-06

Bluetooth device Images:

JY-MCU Linvor
HC-05
HC-06

! Disconnect RX en TX from the Bluetooth device when programming your Arduino!

I used the Arduino BT Joystick App, it has a free and pro version,

The app can be downloaded from the official google play store:
Download Here

Before connecting, make sure your device is connected and turned on,  a red led should be flashing when nothing is connected via Bluetooth. On your Android device, open your Bluetooth settings:

Scan for Bluetooth devices until you find your device in the list of available devices. To connect click the device in the list and enter the default pin code (usually 1234 or 0000)

When successfully connected, the device should say “Paired”:

Now open the BT Joystick app and click “Connect”, now fill in the exact name of your Bluetooth device and hit connect:

The dialog should close and when connected, the led on the Bluetooth module should stop flashing.

Joystick Mode: (Free + Pro app)

0 = no key pressed;
1 = UP key pressed;
2 = DOWN key pressed;
3 = LEFT key pressed;
4 = RIGHT key pressed;
5 = X button pressed;
6 = O key pressed;
7 = SQUARE button pressed;
8 = TRIANGLE button pressed;
9 = SELECT key pressed;
A = START key pressed;

void setup() {
  Serial.begin(9600); 
}

void loop() {
  //Read input from bluetooth module:
  if( Serial.available())
  {
    val = Serial.read();
  }
  //Input key switch
    switch (val) {
    case '0':    
      //Code when no key is pressed
      break;
    case '1':  
      //Code when UP key is pressed 
      break;
    case '2':    
      //Code when DOWN key is pressed 
      break;
    case '3':    
      //Code when LEFT key is pressed 
      break;   
    case '4':    
      //Code when RIGHT key is pressed 
      break;
    case '5':    
      //Code when X key is pressed 
      break;
    case '6':    
      //Code when O key is pressed 
      break;
    case '7':    
      //Code when SQUARE key is pressed 
      break;
    case '8':    
      //Code when TRIANGLE key is pressed 
      break;
    case '9':    
      //Code when SELECT key is pressed 
      break;
    case 'A':    
      //Code when START key is pressed 
      break;
    default:
      // default code (should never run)
    } 
  }
}

Drive mode: (Free + Pro app)

0 = no key pressed;
1 = UP key pressed;
2 = DOWN key pressed;
3 = LEFT key pressed;
4 = RIGHT key pressed;
5 = X button pressed;
6 = O key pressed;
7 = SQUARE button pressed;
8 = TRIANGLE button pressed;
9 = SELECT key pressed;
A = START key pressed;

KEY COMBO ONLY IN DRIVE KEYS (Only in Pro version with multitouch enabled):
B = LEFT key pressed and UP key pressed;
C = LEFT key pressed and DOWN key pressed;
D = RIGHT key pressed and UP key pressed;
E = RIGHT key pressed and DOWN key pressed;

void setup() {
  Serial.begin(9600); 
}

void loop() {
  //Read input from bluetooth module:
  if( Serial.available())
  {
    val = Serial.read();
  }
  //Input key switch
    switch (val) {
    case '0':    
      //Code when no key is pressed
      break;
    case '1':  
      //Code when UP key is pressed 
      break;
    case '2':    
      //Code when DOWN key is pressed 
      break;
    case '3':    
      //Code when LEFT key is pressed 
      break;   
    case '4':    
      //Code when RIGHT key is pressed 
      break;
    case '5':    
      //Code when X key is pressed 
      break;
    case '6':    
      //Code when O key is pressed 
      break;
    case '7':    
      //Code when SQUARE key is pressed 
      break;
    case '8':    
      //Code when TRIANGLE key is pressed 
      break;
    case '9':    
      //Code when SELECT key is pressed 
      break;
    case 'A':    
      //Code when START key is pressed 
      break;
    case 'B':    
      //Code when LEFT+UP key is pressed 
      break;
    case 'C':    
      //Code when LEFT+DOWN key is pressed 
      break;
    case 'D':    
      //Code when RIGHT+UP key is pressed 
      break;
    case 'E':    
      //Code when RIGHT+DOWN key is pressed 
      break;
    default:
      // default code (should never run)
    } 
  }
}