Arduino Bluetooth LED Controller

Chethana Vishmika March 03, 2025

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Circuit Diagram & App

CODE

char t;

void setup() {
  pinMode(13,OUTPUT);
  pinMode(12,OUTPUT);
  pinMode(11,OUTPUT);
  Serial.begin(9600);
}

void loop() {
  if(Serial.available()){
    t=Serial.read();
    Serial.println(t);
 }
 if(t=='R'){
  digitalWrite(13,HIGH);
  digitalWrite(12,LOW);
  digitalWrite(11,LOW);
 }
 else if(t=='G'){
  digitalWrite(13,LOW);
  digitalWrite(12,HIGH);
  digitalWrite(11,LOW);
 }
 else if(t=='B'){
  digitalWrite(13,LOW);
  digitalWrite(12,LOW);
  digitalWrite(11,HIGH);
 }
 else if(t=='W'){
  digitalWrite(13,HIGH);
  digitalWrite(12,HIGH);
  digitalWrite(11,HIGH);
 }
 else if(t=='O'){
  digitalWrite(13,LOW);
  digitalWrite(12,LOW);
  digitalWrite(11,LOW);
 }
}
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