# Adafruit IO provides some built-in MQTT topics # for obtaining the current server time, if you don't have # access to a RTC module. import time import board import busio from digitalio import DigitalInOut from adafruit_esp32spi import adafruit_esp32spi from adafruit_esp32spi import adafruit_esp32spi_wifimanager import adafruit_esp32spi.adafruit_esp32spi_socket as socket import neopixel import adafruit_minimqtt.adafruit_minimqtt as MQTT from adafruit_io.adafruit_io import IO_MQTT ### WiFi ### # Get wifi details and more from a secrets.py file try: from secrets import secrets except ImportError: print("WiFi secrets are kept in secrets.py, please add them there!") raise # If you are using a board with pre-defined ESP32 Pins: esp32_cs = DigitalInOut(board.ESP_CS) esp32_ready = DigitalInOut(board.ESP_BUSY) esp32_reset = DigitalInOut(board.ESP_RESET) # If you have an externally connected ESP32: # esp32_cs = DigitalInOut(board.D9) # esp32_ready = DigitalInOut(board.D10) # esp32_reset = DigitalInOut(board.D5) spi = busio.SPI(board.SCK, board.MOSI, board.MISO) esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset) """Use below for Most Boards""" status_light = neopixel.NeoPixel( board.NEOPIXEL, 1, brightness=0.2 ) # Uncomment for Most Boards """Uncomment below for ItsyBitsy M4""" # status_light = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2) # Uncomment below for an externally defined RGB LED # import adafruit_rgbled # from adafruit_esp32spi import PWMOut # RED_LED = PWMOut.PWMOut(esp, 26) # GREEN_LED = PWMOut.PWMOut(esp, 27) # BLUE_LED = PWMOut.PWMOut(esp, 25) # status_light = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED) wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light) # Define callback functions which will be called when certain events happen. # pylint: disable=unused-argument def connected(client): # Connected function will be called when the client is connected to Adafruit IO. # This is a good place to subscribe to feed changes. The client parameter # passed to this function is the Adafruit IO MQTT client so you can make # calls against it easily. print("Connected to Adafruit IO!") # Subscribe to time/seconds topic # https://io.adafruit.com/api/docs/mqtt.html#time-seconds io.subscribe_to_time("seconds") # Subscribe to time/millis topic # https://io.adafruit.com/api/docs/mqtt.html#time-millis io.subscribe_to_time("millis") # Subscribe to time/ISO-8601 topic # https://io.adafruit.com/api/docs/mqtt.html#time-iso-8601 io.subscribe_to_time("iso") # Subscribe to time/hours topic # NOTE: This topic only publishes once every hour. # https://io.adafruit.com/api/docs/mqtt.html#adafruit-io-monitor io.subscribe_to_time("hours") # pylint: disable=unused-argument def disconnected(client): # Disconnected function will be called when the client disconnects. print("Disconnected from Adafruit IO!") # pylint: disable=unused-argument def message(client, feed_id, payload): # Message function will be called when a subscribed feed has a new value. # The feed_id parameter identifies the feed, and the payload parameter has # the new value. print("Feed {0} received new value: {1}".format(feed_id, payload)) # Connect to WiFi print("Connecting to WiFi...") wifi.connect() print("Connected!") # Initialize MQTT interface with the esp interface MQTT.set_socket(socket, esp) # Initialize a new MQTT Client object mqtt_client = MQTT.MQTT( broker="io.adafruit.com", username=secrets["aio_user"], password=secrets["aio_key"], ) # Initialize an Adafruit IO MQTT Client io = IO_MQTT(mqtt_client) # Connect the callback methods defined above to Adafruit IO io.on_connect = connected io.on_disconnect = disconnected io.on_message = message # Connect to Adafruit IO io.connect() # Start a blocking message loop... # NOTE: NO code below this loop will execute # NOTE: Network reconnection is handled within this loop while True: try: io.loop() except (ValueError, RuntimeError) as e: print("Failed to get data, retrying\n", e) wifi.reset() io.reconnect() continue time.sleep(1)