66 lines
1.7 KiB
Python
66 lines
1.7 KiB
Python
"""
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'analog_in.py'
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==================================
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Example of sending analog sensor
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values to an Adafruit IO feed.
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Author(s): Brent Rubell
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Dependencies:
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- Adafruit_Blinka
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(https://github.com/adafruit/Adafruit_Blinka)
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- Adafruit_CircuitPython_MCP3xxx
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(https://github.com/adafruit/Adafruit_CircuitPython_MCP3xxx)
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"""
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# Import standard python modules
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import time
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# import Adafruit Blinka
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import board
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import digitalio
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import busio
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# import Adafruit IO REST client
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from Adafruit_IO import Client, Feed, RequestError
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# import Adafruit CircuitPython MCP3xxx library
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from adafruit_mcp3xxx.mcp3008 import MCP3008
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from adafruit_mcp3xxx.analog_in import AnalogIn
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# Set to your Adafruit IO key.
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# Remember, your key is a secret,
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# so make sure not to publish it when you publish this code!
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ADAFRUIT_IO_KEY = 'YOUR_AIO_KEY'
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# Set to your Adafruit IO username.
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# (go to https://accounts.adafruit.com to find your username)
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ADAFRUIT_IO_USERNAME = 'YOUR_AIO_USERNAME'
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# Create an instance of the REST client
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aio = Client(ADAFRUIT_IO_USERNAME, ADAFRUIT_IO_KEY)
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try: # if we have a 'analog' feed
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analog = aio.feeds('analog')
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except RequestError: # create a analog feed
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feed = Feed(name='analog')
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analog = aio.create_feed(feed)
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# Create an instance of the `busio.spi` class
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spi = busio.SPI(board.SCLK, board.MOSI, board.MISO)
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# create the cs (chip select)
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cs = digitalio.DigitalInOut(board.D12)
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# create a mcp3008 object
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mcp = MCP3008(spi, cs)
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# create an an adc (single-ended) on pin 0
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chan = AnalogIn(mcp, MCP3008.pin_0)
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while True:
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sensor_data = chan.value
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print('Analog Data -> ', sensor_data)
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aio.send(analog.key, sensor_data)
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# avoid timeout from adafruit io
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time.sleep(0.5)
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