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Blinky

Overview

The Blinky sample is a simple application which blinks an LED forever using the digitalio module. The source code shows how to configure the LED, then turn it on and off.

The table below shows the available LEDs on the nRF52840 Connect Kit:

LED Alias
Green LED LED0
RGB LED - Red LED1 or RED_LED
RGB LED - Green LED2 or GREEN_LED
RGB LED - Blue LED3 or BLUE_LED

Requirements

Before you start, check that you have the required hardware and software:

Running the code

To run the code, complete the following steps:

  1. Connect nRF52840 Connect Kit to your computer using the USB-C Cable.
  2. Start Mu Editor, click Load to open code.py in the CIRCUITPY drive.

  3. Copy and paste the following code into code.py and click Save:

    CIRCUITPY/code.py
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    import time
import digitalio
import board

# Green LED
led = digitalio.DigitalInOut(board.LED0)
led.direction = digitalio.Direction.OUTPUT
while True:
    led.value = True
    time.sleep(0.1)
    led.value = False
    time.sleep(0.1)

  4. Your code will run as soon as the file is done saving. Observe that the Green LED starts to blink.