Bluetooth Controlled Robot

We can control this robot with our smartphone using an Arduino, a Bluetooth module and an Android app downloaded from the Play Store.

Oct 29, 2017

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2 respects

robot

Devices & Components

Arduino Uno Rev3

Dual H-Bridge motor drivers L293D

Project description

Code

arduino sketch

arduino

upload the sketch into your arduino board

1
2char junk;
3String inputString="";
4
5void setup()                    
6{
7  Serial.begin(9600);            
8 pinMode(2, OUTPUT);
9pinMode(3,OUTPUT);
10pinMode(4,OUTPUT);
11pinMode(5,OUTPUT);
12}
13
14void  loop()
15{
16  if(Serial.available()){
17  while(Serial.available())
18    {
19      char inChar = (char)Serial.read(); 
20      inputString += inChar;       
21    }
22    Serial.println(inputString);
23    while (Serial.available() > 0)  
24    {
25 junk = Serial.read() ; 
26}      
27    if(inputString == "f")
28{         
29      digitalWrite(3, HIGH);  
30digitalWrite(2, LOW); 
31digitalWrite(4,  HIGH); 
32digitalWrite(5, LOW); 
33    }
34else if(inputString == "b")
35{  
36      digitalWrite(3, LOW);  
37digitalWrite(2, HIGH); 
38digitalWrite(4,  LOW); 
39digitalWrite(5, HIGH); 
40    }
41else if(inputString == "r")
42{  
43      digitalWrite(3, HIGH);  
44digitalWrite(2, LOW); 
45digitalWrite(4,  LOW); 
46digitalWrite(5, LOW); 
47    }
48else if(inputString == "l")
49{  
50digitalWrite(3, LOW);  
51digitalWrite(2, LOW); 
52digitalWrite(4, HIGH);  
53digitalWrite(5, LOW); 
54    }
55    inputString = "";
56  }
57}
58

char junk;
String inputString="";

void setup()                    
{
  Serial.begin(9600);            
 pinMode(2, OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
}

void  loop()
{
  if(Serial.available()){
  while(Serial.available())
    {
      char inChar = (char)Serial.read(); 
      inputString += inChar;       
    }
    Serial.println(inputString);
    while (Serial.available() > 0)  
    {
 junk = Serial.read() ; 
}      
    if(inputString == "f")
{         
      digitalWrite(3, HIGH);  
digitalWrite(2, LOW); 
digitalWrite(4,  HIGH); 
digitalWrite(5, LOW); 
    }
else if(inputString == "b")
{  
      digitalWrite(3, LOW);  
digitalWrite(2, HIGH); 
digitalWrite(4,  LOW); 
digitalWrite(5, HIGH); 
    }
else if(inputString == "r")
{  
      digitalWrite(3, HIGH);  
digitalWrite(2, LOW); 
digitalWrite(4,  LOW); 
digitalWrite(5, LOW); 
    }
else if(inputString == "l")
{  
digitalWrite(3, LOW);  
digitalWrite(2, LOW); 
digitalWrite(4, HIGH);  
digitalWrite(5, LOW); 
    }
    inputString = "";
  }
}

Downloadable files

circuit diagram

connect the arduino,motor driver and bluetooth module as shown in the figure

circuit diagram

connect the arduino,motor driver and bluetooth module as shown in the figure

circuit diagram

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Vaisakh1997

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