74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
"""
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`mqtt_shared_feeds.py`
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---------------------------------------------------------
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Example of reading and writing to a shared Adafruit IO Feed.
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learn.adafruit.com/adafruit-io-basics-feeds/sharing-a-feed
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Author: Brent Rubell for Adafruit Industries 2018
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"""
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# Import standard python modules.
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import sys
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import time
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import random
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# Import Adafruit IO MQTT client.
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from Adafruit_IO import MQTTClient
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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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# Shared IO Feed
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# Make sure you have read AND write access to this feed to publish.
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IO_FEED = 'SHARED_AIO_FEED_NAME'
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# IO Feed Owner's username
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IO_FEED_USERNAME = 'SHARED_AIO_FEED_USERNAME'
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# Define callback functions which will be called when certain events happen.
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def connected(client):
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"""Connected function will be called when the client connects.
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"""
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client.subscribe(IO_FEED, IO_FEED_USERNAME)
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def disconnected(client):
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"""Disconnected function will be called when the client disconnects.
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"""
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print('Disconnected from Adafruit IO!')
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sys.exit(1)
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def message(client, feed_id, payload):
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"""Message function will be called when a subscribed feed has a new value.
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The feed_id parameter identifies the feed, and the payload parameter has
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the new value.
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"""
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print('Feed {0} received new value: {1}'.format(feed_id, payload))
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# Create an MQTT client instance.
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client = MQTTClient(ADAFRUIT_IO_USERNAME, ADAFRUIT_IO_KEY)
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# Setup the callback functions defined above.
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client.on_connect = connected
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client.on_disconnect = disconnected
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client.on_message = message
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# Connect to the Adafruit IO server.
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client.connect()
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client.loop_background()
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print('Publishing a new message every 10 seconds (press Ctrl-C to quit)...')
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while True:
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value = random.randint(0, 100)
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print('Publishing {0} to {1}.'.format(value, IO_FEED))
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client.publish(IO_FEED, value, IO_FEED_USERNAME)
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time.sleep(10)
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