Merge pull request #492 from adafruit/Raspberry_Pi_E-mail_Notifier_Using_LEDs

Raspberry pi email notifier using leds

Raspberry_Pi_E-mail_Notifier_Using_LEDs/README.md

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+# Raspberry_Pi_E-mail_Notifier_Using_LEDs
+
+Code to accompany this tutorial:
+https://learn.adafruit.com/raspberry-pi-e-mail-notifier-using-leds

Raspberry_Pi_E-mail_Notifier_Using_LEDs/Raspberry_Pi_E-mail_Notifier_Using_LEDs.py

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+import time
+import board
+from imapclient import IMAPClient
+from digitalio import DigitalInOut, Direction
+
+HOSTNAME = 'imap.gmail.com'
+MAILBOX = 'Inbox'
+MAIL_CHECK_FREQ = 60        # check mail every 60 seconds
+
+# The following three variables must be customized for this
+# script to work
+USERNAME = 'your username here'
+PASSWORD = 'your password here'
+NEWMAIL_OFFSET = 1          # my unread messages never goes to zero, use this to override
+
+# setup Pi pins as output for LEDs
+green_led = DigitalInOut(board.D18)
+red_led = DigitalInOut(board.D23)
+green_led.direction = Direction.OUTPUT
+red_led.direction = Direction.OUTPUT
+
+def mail_check():
+    # login to mailserver
+    server = IMAPClient(HOSTNAME, use_uid=True, ssl=True)
+    server.login(USERNAME, PASSWORD)
+
+    # select our MAILBOX and looked for unread messages
+    unseen = server.folder_status(MAILBOX, ['UNSEEN'])
+
+    # number of unread messages
+    # print to console to determine NEWMAIL_OFFSET
+    newmail_count = (unseen[b'UNSEEN'])
+    print('%d unseen messages' % newmail_count)
+
+    if newmail_count > NEWMAIL_OFFSET:
+        green_led.value = True
+        red_led.value = False
+    else:
+        green_led.value = False
+        red_led.value = True
+
+    time.sleep(MAIL_CHECK_FREQ)
+
+while True:
+    mail_check()