pcf8575_simpletest.py

# SPDX-FileCopyrightText: Copyright (c) 2022 ladyada for Adafruit Industries
#
# SPDX-License-Identifier: Unlicense

import time
import board
import adafruit_pcf8575

print("PCF8575 digitalio LED blink test")

i2c = board.I2C()  # uses board.SCL and board.SDA
# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
pcf = adafruit_pcf8575.PCF8575(i2c)

# get a 'digitalio' like pin from the pcf
led = pcf.get_pin(0)

# Setup pin 15 as an output that's at a high logic level default
led.switch_to_output(value=True)

while True:
    led.value = True
    time.sleep(0.2)
    led.value = False
    time.sleep(0.2)