Convert to standard logging library

Increasing sliding window size makes it less sensitive to change, which
makes it take a little longer to register that the dryer is on. This
allows for short bursts of acceleration due to opening/closing the door
and loading clothes.

laundry_notifier/run.py

@@ -1,4 +1,5 @@
 import configparser
+import logging
 import math
 import smtplib
 import time
@@ -9,8 +10,6 @@ import requests
 from microstacknode.hardware.accelerometer.mma8452q import MMA8452Q
 
 
-EMAIL_USERNAME = 'noreply@ianonavy.com'
-EMAIL_PASSWORD = 'S2PENjQbO6=cHgchw@CXs.bJ'
 RECIPIENT_EMAILS = ['ianonavy@gmail.com']
 ALERT_EMAIL_TEXT = """Hi,
 
@@ -21,8 +20,9 @@ Ianonavy Bot
 """
 G_RANGE = 2
 INTERVAL = 0.005  # seconds
-WINDOW_SIZE = 400  # intervals
+WINDOW_SIZE = 1000  # intervals
 THRESHOLD = 0.025  # G's
+MAX_EMAIL_FREQUENCY = 60  # seconds
 MAX_NOTIFICATION_FREQUENCY = 60  # seconds
 CONFIG_FILE_PATH = '/home/pi/laundry-notifier/laundry_notifier/laundry_notifier.conf'
 
@@ -39,8 +39,8 @@ def stdev(s):
     return math.sqrt(average(list(variance)))
 
 
-def notify_user(recipient_email_address):
+def notify_user(username, password, recipient_email_address):
-    log("Alerting " + recipient_email_address)
+    logging.info("Alerting " + recipient_email_address)
 
     msg = MIMEText(ALERT_EMAIL_TEXT)
 
@@ -51,8 +51,6 @@ def notify_user(recipient_email_address):
     msg['To'] = recipient_email_address
 
     # Send the message via our own SMTP server.
-    username = EMAIL_USERNAME
-    password = EMAIL_PASSWORD
     server = smtplib.SMTP('smtp.gmail.com:587')
     server.starttls()
     server.login(username, password)
@@ -77,8 +75,7 @@ def amplitude_stdev(sliding_window):
 def send_notifications(last_notification_sent_at, iftttkey):
     seconds_since_last_notification = \
         (datetime.now() - last_notification_sent_at).seconds
-    # Log the time notifications were sent
+    logging.info("Sending notification after %ds" % seconds_since_last_notification)
-    log("Sending notification after %ds" % seconds_since_last_notification)
     # limit frequency of notifications
     if seconds_since_last_notification > MAX_NOTIFICATION_FREQUENCY:
         [notify_user(email) for email in RECIPIENT_EMAILS]
@@ -91,10 +88,16 @@ def send_notifications(last_notification_sent_at, iftttkey):
 
 
 def main():
-    log('started laundry notifier')
+    LOG_FORMAT = '%(asctime)-15s %(message)s'
+    logging.basicConfig(format=LOG_FORMAT)
+    logging.getLogger().setLevel(logging.INFO)
+    logging.info('Started laundry notifier')
     config = configparser.ConfigParser()
     config.read(CONFIG_FILE_PATH)
-    iftttkey = config['notifications']['ifttt_key']
+    notifications_section = config['notifications']
+    iftttkey = notifications_section['ifttt_key']
+    email_username = notifications_section['email_username']
+    email_password = notifications_section['email_password']
     with MMA8452Q() as accelerometer:
         # Configure accelerometer
         accelerometer.standby()
@@ -116,23 +119,21 @@ def main():
                 if sliding_stdev['x'] < THRESHOLD:
                     # Notify recipients on state transitions from 'on' to 'off'
                     if dryer_state == 'on':
-                        log('Dryer turned off; sliding stdev is %f' % sliding_stdev['x'])
+                        logging.info('Dryer turned off; sliding stdev is %f' % sliding_stdev['x'])
                         last_notification_sent_at = send_notifications(
                             last_notification_sent_at,
+                            email_username,
+                            email_password,
                             iftttkey)
                     dryer_state = 'off'
                 else:
                     # Log state transitions from 'off' to 'on'
                     if dryer_state == 'off':
-                        log('Dryer turned on; sliding stdev is %f' % sliding_stdev['x'])
+                        logging.info('Dryer turned on; sliding stdev is %f' % sliding_stdev['x'])
                     dryer_state = 'on'
 
             time.sleep(INTERVAL)
 
 
-def log(message):
-    print('%s\t%s' % (datetime.isoformat(datetime.now()), message))
-
-
 if __name__ == '__main__':
     main()