This demo shows controlling an LED from Adafruit IO. The same kind of control can be used for relays, lights, motors, or solenoids.
One of the first programs you typically write to get used to embedded programming is a sketch that repeatably blinks an LED. IoT projects are wireless, so after completing this section, you'll be able to turn on (or off) the LED built into your board from anywhere in the world.
A little red LED is just beneath the pin labelled BAT on the board, above the USB connector (when on the left side).
It's connected to pin GPIO13 (D13)
Create a LED Component on Adafruit IO
On the device page, click the New Component (or "+") button to open the component picker.
Search for the component name by entering LED into the text box on the component picker, the list of components should update as soon as you stop typing.
Since WipperSnapper supports such a large number of components, there is keyword filtering. Try searching for various keywords, like:
- component names:
aht20,servo,buzzer,button,led, etc - sensor types:
light,temperature,pressure,humidity, etc - interface:
i2c,uart,ds18x20,pin, etc (also I2C addresses e.g.0x44) - vendor:
Adafruit,ASAIR,Infineon,Bosch,Honeywell,Sensirion, etc
There are also product and documentation links to every component. Follow the links beneath the component descriptions to be taken to the appropriate product page or Learn Guide
On the Create LED Component form, the board's LED pin is pre-selected.
Click Create Component.
Behind the scenes, Adafruit IO sends send a command to your board running WipperSnapper telling it to configure "LED Pin" as a digital output.
Your board's page on Adafruit IO shows a new LED component.
On the board page, toggle the LED component by clicking the toggle switch. This should turn your board's built-in LED on or off.
The built-in LED pin (D13) also supports PWM, and can instead be used as a Dimmable LED component as shown here:
Page last edited March 26, 2024
Text editor powered by tinymce.
