Introduction

The GPIO driver for RGB LEDs is used in conjunction with an RGB LED either in common cathode or common anode layout.

Driver Parameters

The GPIO driver for RGB LEDs has four parameters that need to be configured:

Red Pin

This pin is connected to the red leg of the LED.

Green Pin

This pin is connected to the green leg of the LED.

Blue Pin

This pin is connected to the blue leg of the LED.

Layout

This determines whether the common connection of the LED is connected to GND (common cathode) or 3.3V (common anode).

Wiring

Common Cathode

GP1, GP2 and GP3 are connected to the color pins of the LED through a 100Ω current limiting resistor each. The common cathode leg is connected to GND.

Used Pins

Common Anode

GP1, GP2 and GP3 are connected to the color pins of the LED through a 100Ω current limiting resistor each. The common anode leg is connected to 3.3V.

Used Pins

How to write an App

Navigate to the App Builder and create a new application. You can find the “LED RGB” code object under the “Hardware” Tab in the object drop down menu on the left, or you can also use the search bar.

Drag the “LED RGB” object onto the canvas.

 Next, located under the interface tab find the “Color Picker” object and drag it onto the canvas.

Finally, connect the Color port from the “Color Picker” object to the RGB Color port on the “LED RGB” object, label your objects, and save your application.

How to create a firmware

Navigate to the Firmware Builder and create a new firmware file.

Click the “+ Add Hardware” button which will open a modal window. Scroll down in the list to find the “Display” section and select the “LED RGB” hardware option.

Give your device a name, and click “Add Hardware”

Next, select the “LED RGB” driver under the driver dropdown menu.

For this example we select:

Red Pin: GP0

Green Pin: GP1

Blue Pin: GP2

Layout: Common Cathode

You may now save your firmware file and upload it to one of your clients.

Supported Hardware

• RGB LED

Downloads