1  # SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
  2  #
  3  # SPDX-License-Identifier: MIT
  4  
  5  """
  6  'adafruit_io_adt7410.py'
  7  ==================================
  8  Example of sending temperature
  9  values to an Adafruit IO feed using
 10  an ADT7410 breakout.
 11  
 12  Dependencies:
 13      - Adafruit_Blinka
 14          (https://github.com/adafruit/Adafruit_Blinka)
 15      - Adafruit_CircuitPython_SSD1306
 16          (https://github.com/adafruit/Adafruit_CircuitPython_SSD1306)
 17      - Adafruit_CircuitPython_ADT7410
 18          (https://github.com/adafruit/Adafruit_CircuitPython_ADT7410)
 19  """
 20  # Import standard python modules
 21  import time
 22  
 23  # import Adafruit SSD1306 OLED
 24  from PIL import Image, ImageDraw, ImageFont
 25  import adafruit_ssd1306
 26  
 27  # import Adafruit IO REST client
 28  from Adafruit_IO import Client
 29  
 30  # import Adafruit CircuitPython adafruit_adt7410 library
 31  import adafruit_adt7410
 32  
 33  # import Adafruit Blinka
 34  import board
 35  import busio
 36  import digitalio
 37  
 38  # Delay between sensor reads, in seconds
 39  DELAY_SECONDS = 30
 40  
 41  # Set to your Adafruit IO key.
 42  # Remember, your key is a secret,
 43  # so make sure not to publish it when you publish this code!
 44  ADAFRUIT_IO_KEY = 'ADAFRUIT_IO_KEY'
 45  
 46  # Set to your Adafruit IO username.
 47  # (go to https://accounts.adafruit.com to find your username)
 48  ADAFRUIT_IO_USERNAME = 'ADAFRUIT_IO_USERNAME'
 49  
 50  # Create an instance of the REST client
 51  aio = Client(ADAFRUIT_IO_USERNAME, ADAFRUIT_IO_KEY)
 52  
 53  # Set up `temperature` feed
 54  pi_temperature = aio.feeds('temperature')
 55  
 56  # Set up OLED
 57  i2c_bus = busio.I2C(board.SCL, board.SDA)
 58  oled_reset = digitalio.DigitalInOut(board.D21)
 59  disp = adafruit_ssd1306.SSD1306_I2C(128, 32, i2c_bus, reset=oled_reset)
 60  # Clear display.
 61  disp.fill(0)
 62  disp.show()
 63  
 64  # Create blank image for drawing.
 65  # Make sure to create image with mode '1' for 1-bit color.
 66  width = disp.width
 67  height = disp.height
 68  image = Image.new('1', (width, height))
 69  # Get drawing object to draw on image.
 70  draw = ImageDraw.Draw(image)
 71  # `sudo apt-get install ttf-mscorefonts-installer` to get these fonts
 72  font_big = ImageFont.truetype('/usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf', 16)
 73  font_small = ImageFont.truetype('/usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf', 12)
 74  
 75  adt = adafruit_adt7410.ADT7410(i2c_bus, address=0x48)
 76  adt.high_resolution = True
 77  time.sleep(0.25)  # wait for sensor to boot up and get first reading
 78  
 79  while True:
 80      # clear screen
 81      draw.rectangle((0, 0, width, height), outline=0, fill=0)
 82  
 83      # Read the temperature sensor
 84      tempC = adt.temperature
 85      tempC = round(tempC, 2)
 86  
 87      # display the temperature on the OLED
 88      draw.text((0, 0), "Temp: %0.2F *C" % tempC, font=font_big, fill=255)
 89  
 90      # Send temperature to Adafruit IO
 91      print('Sending temperature {0} C to Adafruit IO'.format(tempC))
 92      draw.text((0, 16), "Sending...", font=font_small, fill=255)
 93      disp.image(image)
 94      disp.show()
 95  
 96      aio.send(pi_temperature.key, tempC)
 97      draw.text((0, 16), "Sending...Done!", font=font_small, fill=255)
 98      disp.image(image)
 99      disp.show()
100  
101      # Delay for DELAY_SECONDS seconds to avoid timeout from adafruit io
102      time.sleep(DELAY_SECONDS)