1  """
 2  Example of using Adafruit IO's
 3  random data service.
 4  """
 5  import time
 6  import board
 7  import busio
 8  from digitalio import DigitalInOut
 9  
10  # ESP32 SPI
11  from adafruit_esp32spi import adafruit_esp32spi, adafruit_esp32spi_wifimanager
12  
13  # Import NeoPixel Library
14  import neopixel
15  
16  # Import Adafruit IO HTTP Client
17  from adafruit_io.adafruit_io import IO_HTTP
18  
19  # Get wifi details and more from a secrets.py file
20  try:
21      from secrets import secrets
22  except ImportError:
23      print("WiFi secrets are kept in secrets.py, please add them there!")
24      raise
25  
26  # ESP32 Setup
27  try:
28      esp32_cs = DigitalInOut(board.ESP_CS)
29      esp32_ready = DigitalInOut(board.ESP_BUSY)
30      esp32_reset = DigitalInOut(board.ESP_RESET)
31  except AttributeError:
32      esp32_cs = DigitalInOut(board.D9)
33      esp32_ready = DigitalInOut(board.D10)
34      esp32_reset = DigitalInOut(board.D5)
35  
36  spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
37  esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
38  status_light = neopixel.NeoPixel(
39      board.NEOPIXEL, 1, brightness=0.2
40  )  # Uncomment for Most Boards
41  """Uncomment below for ItsyBitsy M4"""
42  # status_light = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
43  wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)
44  
45  # Set your Adafruit IO Username and Key in secrets.py
46  # (visit io.adafruit.com if you need to create an account,
47  # or if you need your Adafruit IO key.)
48  aio_username = secrets["aio_username"]
49  aio_key = secrets["aio_key"]
50  
51  # Create an instance of the Adafruit IO HTTP client
52  io = IO_HTTP(aio_username, aio_key, wifi)
53  
54  # Random Data ID
55  # (to obtain this value, visit
56  # https://io.adafruit.com/services/words
57  # and copy over the location ID)
58  random_data_id = 1234
59  
60  while True:
61      try:
62          print("Fetching random data from Adafruit IO...")
63          random_data = io.receive_random_data(random_data_id)
64          print("Random Data: ", random_data["value"])
65          print("Data Seed: ", random_data["seed"])
66          print("Waiting 1 minute to fetch new randomized data...")
67      except (ValueError, RuntimeError) as e:
68          print("Failed to get data, retrying\n", e)
69          wifi.reset()
70          continue
71      time.sleep(60)