test_signal.py

from machine import Pin, Signal

led_pin = Pin(25, Pin.OUT)

# 灯亮 表示高电平
led = Signal(led_pin, invert=False)
led.value(1)
led.on()

# 灯亮 表示低电平有效
# led = Signal(led_pin, invert=True)
# led.value(0)
# led.off()