Cloudio contains on-board RGB LED.
RGB LEDs consist of one red, one green, and one blue LED. By independently adjusting each of the three, these can produce a wide range of colors.

Block description

This block is used to control the on-board RGB LED and set it on at a desired color.

Hardware interface

Led Hardware

App interface and usage


You can use the Swatches option to select from 9 colors besides the Off option.
Led 1

Alternately, you can use the Custom option to set RGB values of your choice to create custom colours for the LED.
Led 2


The LED once turned ON continues to be on till you turn it off. So, if you turn it on inside a conditional block, it does not automatically turn off when the condition ceases to be true; you’d need to set it off as part of the code in your project.


This example runs a loop where the LED continuously switches between red and green with a gap of 500 milliseconds between the two.
Led Example