so in this tutorial i will show you how to controll rgb led with android smartphone
 RGB leds work on the basic concept of combination of the basic colors of any shade, that is, red, green and blue. All the colors have these elementary color components in them. Thus, we can make any color we want using a RGB LED
so i am going to controll the colours with my android smarphone .
things needed
1.arduino nano

2.hc 05 bluetooth module

3. common cathode rgb led

circuit diagram

breadboard testing

code and circuit diagram
dowload remotexy from playstore and pair with bluetooth module
watch video