Control LED with Bluetooth!

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

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