RGB LED Light with HC 05 Bluetooth Module and Arduino

1/*
2  This program reads the the data received
3  by the HC-05 Bluetooth  Module from the Android
4  app and writes the specific values to the RGB
5  LED.  This creates different colors on the LED.
6 
7  This program is made by Shreyas  for
8  Electronics Champ YouTube Channel.
9  Please subscribe to this channel
10  Thank You
11*/
12 
13//Including the library
14#include <SoftwareSerial.h>
15  
16//Creating a SoftwareSerial object
17SoftwareSerial HC05(3, 4);
18 
19//Initialize  the variables
20String data = "";
21int red;
22int green;
23int blue;
24  
25void setup() {
26 
27  //Start Serial Communication
28  Serial.begin(9600);
29  HC05.begin(9600);
30 
31  //Assign modes to the specific pins
32  pinMode(A0,  OUTPUT);
33  pinMode(A1, OUTPUT);
34  pinMode(A2, OUTPUT);
35 
36}
37 
38void  loop() {
39 
40  //If HC-05 has received data...
41  if (HC05.available()){
42  
43    //Reads the data
44    data = HC05.readString();
45 
46    //Gets the  value of each color
47    red = data.substring(0, 3).toInt();
48    green = data.substring(3,  6).toInt();
49    blue = data.substring(6, 9).toInt();
50 
51    //Writes the  values to the specific pins
52    analogWrite(A0, red);
53    analogWrite(A1,  green);
54    analogWrite(A2, blue);
55    
56  }
57 
58}