Control LED with Bluetooth!

This tutorial explains how to connect Arduino and Bluetooth module (HC-06, but HC-05 can be used too).

Feb 22, 2019

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3 respects

Devices & Components

Arduino Uno Rev3

9V battery (generic)

Resistor 220 ohm

Breadboard (generic)

LED (generic)

HC-06 Bluetooth Module

Software & Tools

Arduino IDE

Cover art Smart Bluetooth - Arduino Bluetooth Serial ⚡

Project description

Code

smartbluetooth_blink

c_cpp

This is the main code for this project

1/* Made by Tomas Kopunec
2 *  2.22.2019
3 *  
4 *  By default SMART   BLUETOOTH app
5 *  sends 'a' when turning ON and 'b' when turning OFF
6 * 
7   *  If you have any questions or issues
8 *  don't hesitate and send me a message   here: devkopunec@gmail.com
9 *  
10 *  Don't forget to leave a 5-star rating   and nice feedback
11 *  
12 *  Thanks, Kopunec
13 */
14
15
16const int led   = 2;
17
18void setup() {
19  Serial.begin(9600);
20  pinMode(led, OUTPUT);
21}
22
23void   loop() {
24  char c = Serial.read();
25  if(c == 'a'){
26    digitalWrite(led,   HIGH);
27  }
28  else if(c == 'b'){
29    digitalWrite(led, LOW);
30  }
31   else{
32      
33  }
34  delay(25);
35}
36

/* Made by Tomas Kopunec
 *  2.22.2019
 *  
 *  By default SMART   BLUETOOTH app
 *  sends 'a' when turning ON and 'b' when turning OFF
 * 
   *  If you have any questions or issues
 *  don't hesitate and send me a message   here: devkopunec@gmail.com
 *  
 *  Don't forget to leave a 5-star rating   and nice feedback
 *  
 *  Thanks, Kopunec
 */


const int led   = 2;

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}

void   loop() {
  char c = Serial.read();
  if(c == 'a'){
    digitalWrite(led,   HIGH);
  }
  else if(c == 'b'){
    digitalWrite(led, LOW);
  }
   else{
      
  }
  delay(25);
}

smartbluetooth_blink

c_cpp

This is the main code for this project

1/* Made by Tomas Kopunec
2 *  2.22.2019
3 *  
4 *  By default SMART  BLUETOOTH app
5 *  sends 'a' when turning ON and 'b' when turning OFF
6 * 
7  *  If you have any questions or issues
8 *  don't hesitate and send me a message  here: devkopunec@gmail.com
9 *  
10 *  Don't forget to leave a 5-star rating  and nice feedback
11 *  
12 *  Thanks, Kopunec
13 */
14
15
16const int led  = 2;
17
18void setup() {
19  Serial.begin(9600);
20  pinMode(led, OUTPUT);
21}
22
23void  loop() {
24  char c = Serial.read();
25  if(c == 'a'){
26    digitalWrite(led,  HIGH);
27  }
28  else if(c == 'b'){
29    digitalWrite(led, LOW);
30  }
31  else{
32      
33  }
34  delay(25);
35}
36

/* Made by Tomas Kopunec
 *  2.22.2019
 *  
 *  By default SMART  BLUETOOTH app
 *  sends 'a' when turning ON and 'b' when turning OFF
 * 
  *  If you have any questions or issues
 *  don't hesitate and send me a message  here: devkopunec@gmail.com
 *  
 *  Don't forget to leave a 5-star rating  and nice feedback
 *  
 *  Thanks, Kopunec
 */


const int led  = 2;

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}

void  loop() {
  char c = Serial.read();
  if(c == 'a'){
    digitalWrite(led,  HIGH);
  }
  else if(c == 'b'){
    digitalWrite(led, LOW);
  }
  else{
      
  }
  delay(25);
}

Downloadable files

Schematic EasyEDA

This is the schematic for this project made in EasyEDA

Schematic EasyEDA

This is the schematic for this project made in EasyEDA

Schematic EasyEDA

Schematics Fritzing

This is the schematic for this project made in Fritzing

Schematics Fritzing

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