add back removed digital in..

examples/basics/digital_in.py

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+"""
+'digital_in.py'
+==================================
+Example of sending button values
+to an Adafruit IO feed.
+
+Author(s): Brent Rubell, Todd Treece
+"""
+# Import standard python modules
+import time
+
+# import Adafruit Blinka
+import board
+import digitalio
+
+# import Adafruit IO REST client.
+from Adafruit_IO import Client, Feed, RequestError
+
+# Set to your Adafruit IO key.
+# Remember, your key is a secret,
+# so make sure not to publish it when you publish this code!
+ADAFRUIT_IO_KEY = 'YOUR_AIO_KEY'
+
+# Set to your Adafruit IO username.
+# (go to https://accounts.adafruit.com to find your username)
+ADAFRUIT_IO_USERNAME = 'YOUR_AIO_USERNAME'
+
+# Create an instance of the REST client.
+aio = Client(ADAFRUIT_IO_USERNAME, ADAFRUIT_IO_KEY)
+
+try: # if we have a 'digital' feed
+    digital = aio.feeds('digital')
+except RequestError: # create a digital feed
+    feed = Feed(name="digital")
+    digital = aio.create_feed(feed)
+
+# button set up
+button = digitalio.DigitalInOut(board.D12)
+button.direction = digitalio.Direction.INPUT
+button.pull = digitalio.Pull.UP
+button_current = 0
+
+
+while True:
+    if not button.value:
+        button_current = 1
+    else:
+        button_current = 0
+
+    print('Button -> ', button_current)
+    aio.send(digital.key, button_current)
+
+    # avoid timeout from adafruit io
+    time.sleep(1)