Control RGB Led Using Smartphone By Arduino and Bluetooth By Technoesolution | #arduinoprojects

Description 

This article will show you how to "Control RGB LED Using Bluetooth And Arduino With the Help of Smartphone App" in a few steps. First, collect all the material which is listed below. Refer to the circuit diagram to make connections.

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Material Required:- 

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Circuit Diagram:-

Refer to the above circuit diagram to make connections.

Arduino Code:-

/*
   Hello guys welcome back to "Techno-E-Solution"
   Project Name:- Control RGB Led Using Smartphone By Arduino and Bluetooth
   Project Video:- https://youtu.be/Rj1dEKGPtl8
*/

#include <SoftwareSerial.h>
#include <Wire.h>
SoftwareSerial mySerial(0,1); // RX and TX pins
int PIN_RED = 9;
int PIN_GREEN = 10;
int PIN_BLUE = 11;
String RGB = "";
String RGB_Previous = "255.255.255";
String ON = "ON";
String OFF = "OFF";
boolean RGB_Completed = false;
void setup()
{
pinMode (PIN_RED, OUTPUT);
pinMode (PIN_GREEN, OUTPUT);
pinMode (PIN_BLUE, OUTPUT);
Serial.begin(9600);
mySerial.begin(9600);
RGB.reserve(30);
}
void loop()
{
while(mySerial.available())
{
char ReadChar = (char)mySerial.read();
if(ReadChar == ')')
{
RGB_Completed = true;
}else{
RGB += ReadChar;
}
}
if(RGB_Completed)
{
Serial.print("RGB:");
Serial.print(RGB);
Serial.print(" PreRGB:");
Serial.println(RGB_Previous);
if(RGB==ON)
{
RGB = RGB_Previous;
Light_RGB_LED();
}
else if(RGB==OFF)
{
RGB = "0.0.0";
Light_RGB_LED();
}else{
Light_RGB_LED();
RGB_Previous = RGB;
}
RGB = "";
RGB_Completed = false;
}
}
void Light_RGB_LED()
{
int SP1 = RGB.indexOf(' ');
int SP2 = RGB.indexOf(' ', SP1+1);
int SP3 = RGB.indexOf(' ', SP2+1);
String R = RGB.substring(0, SP1);
String G = RGB.substring(SP1+1, SP2);
String B = RGB.substring(SP2+1, SP3);
Serial.print("R=");
Serial.println( constrain(R.toInt(),0,255));
Serial.print("G=");
Serial.println(constrain(G.toInt(),0,255));
Serial.print("B=");
Serial.println( constrain(B.toInt(),0,255));
analogWrite(PIN_RED, (R.toInt()));//comment if colors are inverted
analogWrite(PIN_GREEN, (G.toInt()));//and uncomment part below.
analogWrite(PIN_BLUE, (B.toInt()));
analogWrite(PIN_RED, (255-R.toInt()));//uncomment if colors are inverted
analogWrite(PIN_GREEN, (255-G.toInt()));//and comment above part.
analogWrite(PIN_BLUE, (255-B.toInt()));
}