Androids Apps controlled Robot with project Demo.

It is the special type of Robot which is controlled via Android phone using special Apps. Here we use Bluetooth for the communication between Robot and the Remote (i.e Mobile).
Robot changes its direction according to the instruction given to it.
Bluetooth is the standard Wireless technology  used for exchange the data  over the short distance.

Android Apps Control Robot

Component Required :-

1. Bluetooth Module[HC05]
2. Arduino UNO
3. Motor Driver
4. Motors
5. Wheels 
6. Robot Chasis
7. Jumper Wires

Here we use Bluetooth module HC05 for sending the data from Transmitter device.It has 6 Pins but we use only 4 out of 6 pins they are VCC,GND,TX,RX.

Image:- Bluetooth Module HC05

VCC and GND are used for power supply and TX and RX  for transmitting and receiving the data.

Circuit Diagram:-

         Fig :- Bluetooth Controlled Robot Circuit diagram

 Connect the circuit as shown in the figure
Output From The motor driver to 6,7,8,9 pin of Arduino. RXD and TXD pin to the 10,11 pin of Arduino.

Code :-
#include <SoftwareSerial.h>
SoftwareSerial myserial(10,11);
int lm1=6;
int lm2=7;
int rm1=8;
int rm2=9;
void setup()
{
pinMode(lm1,OUTPUT);
pinMode(lm2,OUTPUT);
pinMode(rm1,OUTPUT);
pinMode (rm2,OUTPUT);
Serial.begin(9600);
myserial.begin(9600);
myserial.println("connect A B C or any other");
}
void loop()
{
if (myserial.available())
{
      int val=myserial.read();
      Serial.println(val);

if(val=='A')
 {
      digitalWrite(lm1,HIGH);
      digitalWrite(lm2,LOW);
      digitalWrite(rm1,HIGH);
      digitalWrite(rm2,LOW);
      Serial.println("\n Moving Forward");
 }
 else if(val=='B')
 {
      digitalWrite(lm1,LOW);
      digitalWrite(lm2,HIGH);
      digitalWrite(rm1,LOW);
      digitalWrite(rm2,HIGH);
      Serial.println("\n moving backward");
 }
 else if(val=='C')
 {
      digitalWrite(lm1,HIGH);
      digitalWrite(lm2,LOW);
      digitalWrite(rm1,LOW);
      digitalWrite(rm2,HIGH);
      Serial.println("\n moving left");
 }
 else if(val=='D')
 {
    digitalWrite(lm1,LOW);
    digitalWrite(lm2,HIGH);
    digitalWrite(rm1,HIGH);
    digitalWrite(rm2,LOW);
    Serial.println("\n now moving right");
 }
 else
{
  digitalWrite(lm1,LOW);
  digitalWrite(lm2,LOW);
  digitalWrite(rm1,LOW);
  digitalWrite(rm2,LOW);
  Serial.println(" \n now stop");
}
}
}
For Demo Click here
Feel free to comment about your problem.