Control LEDs Using Arduino And Bluetooth

Arduino and Bluetooth modules control the LEDs. And we can replace these LEDs with relays so we can also control other appliances, too.

Oct 22, 2017

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project

home automation

Devices & Components

Arduino Uno Rev3

SparkFun Bluetooth Modem - BlueSMiRF Silver

Software & Tools

Arduino IDE

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(13, OUTPUT);
9pinMode(10,OUTPUT);
10pinMode(7,OUTPUT);
11}
12
13void  loop()
14{
15  if(Serial.available()){
16  while(Serial.available())
17    {
18      char inChar = (char)Serial.read(); 
19      inputString += inChar;       
20    }
21    Serial.println(inputString);
22    while (Serial.available() > 0)  
23    {
24 junk = Serial.read() ; 
25}      
26    if(inputString == "a")
27{         
28      digitalWrite(13, HIGH);  
29    }
30else if(inputString ==  "b")
31{  
32      digitalWrite(10, HIGH);
33    }
34else if(inputString ==  "c")
35{  
36      digitalWrite(7, HIGH);
37    }
38else if(inputString ==  "x")
39{  
40      digitalWrite(10, LOW);
41 digitalWrite(13, LOW);
42 digitalWrite(7,  LOW);
43    }
44    inputString = "";
45  }
46}
47

char junk;
String inputString="";

void setup()                    
{
  Serial.begin(9600);            
 pinMode(13, OUTPUT);
pinMode(10,OUTPUT);
pinMode(7,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 == "a")
{         
      digitalWrite(13, HIGH);  
    }
else if(inputString ==  "b")
{  
      digitalWrite(10, HIGH);
    }
else if(inputString ==  "c")
{  
      digitalWrite(7, HIGH);
    }
else if(inputString ==  "x")
{  
      digitalWrite(10, LOW);
 digitalWrite(13, LOW);
 digitalWrite(7,  LOW);
    }
    inputString = "";
  }
}

Downloadable files

Circuit diagram

connect the arduino and Bluetooth module as show in the picture

Circuit diagram

connect the arduino and Bluetooth module as show in the picture

Circuit diagram

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Vaisakh1997

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