GPIO

The F1 smart module has more than twenty spare General Purpose Input-Output (GPIO) pins available for you to use with your own sensors and actuators. Below outlines the basics for configuring and controlling the GPIO as output and input pins.

Output

Controlling the GPIO pins of the module is straightforward. The example below shows how to generate a 1 Hz clock signal at Pin 9.

from machine import Pin
import time

Pin9 = Pin(Pin.P9, mode=Pin.OUT)

while True:
    print("high")
    Pin9.value(1)
    time.sleep(1)
    print("low")
    Pin9.value(0)
    time.sleep(1)

Input

Sometimes, it is useful to know the state of a pin. For example, you could use the SBOOT button on the Starter Kit to toggle the LED.

from machine import Pin
import rgbled

button = Pin(Pin.P12, mode=Pin.IN)  # SBOOT button on Starter Kit

while True:
    if button() == 1:
        rgbled.color(0x00003300)  # turn LED to Green
    else:
        rgbled.color(0x00000000)  # turn off LED