Built-in LED

The built-in LED on the Pico board can be controlled with the led command. This is a simple way to confirm that you can control the board, and it’s also useful for indicating the board’s status. Here’s how to use it:

To turn the LED on and off:

L:/>led on
L:/>led off

Use the flip subcommand to toggle the LED at specified intervals. The following example blinks the LED every 100ms:

L:/>led on flip:100

The flip subcommand blinks the LED eternally in the background, so you can run other commands while the LED blinks. To stop the blinking, use the led off command:

L:/>led off

The following example blinks the LED for 50ms, off for 500ms, three times, then off for 2000ms, and repeats:

L:/>led on flip:50,500,50,500,50,2000

To stop flipping after a certain number of times, add * at the end. The following blinks three times, then turns off:

L:/>led on flip:50,500,50,500,50,*