Android Aplication for Robot Control Using HC-05 and Arduino ( Android Studio )

Hello everyone, this time I will show you how to control robot using your phone, please follow this instruction carefully. Actually, this project is still under development.

Step 1: What We Need for Robot

Before we go to android application, we need to prepare the robot,

1. HC-05 (Bluetooth Module)

2. Arduino Nano (Control)

3. L293 (Driver Motor)

4. 2 motorDC include wheel

5. Battery

Step 2: Circuit HC-05

HC-05 Bluetooth Connection:

Arduino => HC-05

5V => VCC

GND => GND

7 => TXD

8 => RXD

We are not using port tx rx arduino, so we can check bluetooth data in Serial Monitor.

Step 3: Motor Driver

L293 Connection:

PWM Left = 11

DIR1 Left = 13

DIR2 Left = 2

PWM Rigt = 3

DIR1 Right = 9

DIR2 Right = 4

Step 4: Software

1. Arduino IDE

2. Android Studio

Arduino IDE for programming arduino and Android studio for android.

Step 5: Programming Robot

Declaration or give a name for each pin:

const byte PWMKI = 11;

const byte DIR1KI = 13;

const byte DIR2KI = 2;

const byte PWMKA = 3;

const byte DIR1KA = 9;

const byte DIR2KA = 4;

setup program, set output arduino pin for out motor driver:

pinMode(PWMKI,OUTPUT);

pinMode(DIR1KI,OUTPUT);

pinMode(DIR2KI,OUTPUT);

pinMode(PWMKA,OUTPUT);

pinMode(DIR1KA,OUTPUT);

pinMode(DIR2KA,OUTPUT);

Klik New tab, give name motor.ino:

When DIR1 and DIR2 have diferent logic motor run. just using digitalWrite (digital pin,HIGH/LOW) for outpur DIR and analogWrite(analog pin,0-255) for output PWM.

In motor.ino have program cekMotor to check your motor drive, uncomment cekMotor() and comment play() to check motor drive then upload program, the program is: Forward => Backward => Turn Right => Turn Left. If the robot don't do it, so check your hardware and cable connection.

Klik New tab, give name BT.ino:

In BT.ino have two program:

1. cekBluetooth ( to check bluetooth data in Serial Monitor )

2. play ( to play robot using phone )

*Be carefull to open file program, open bluetooth_robot.ino don't open motor.ino and BT.ino.

*Some comment is use Indonesia lenguage.