The module has several spare General Purpose Input-Output (GPIO) pins available for you to use with your own sensors and actuators.
Controlling the GPIO pins of the modules is rather easy. In the example below, we can let the orange LED on the expansion board blink.
from machine import Pin import time led = Pin('P9', mode=Pin.OUT) while True: print("high") led.value(1) time.sleep(1) print("low") led.value(0) time.sleep(1)
Sometimes, it would be useful to know the state of a pin. For example, you could use the button on the xpansion board to toggle the led
from machine import Pin import time led = Pin('P9', mode = Pin.OUT) button = Pin('P10', mode = Pin.IN) while True: if(button() == 1): led.value(1) else: led.value(0)