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Projects/Catch_A_Lunch_Thief/catch_a_lunch_thief.py

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+#! /usr/local/bin/python
+# This project by Dexter Industries will help you figure out who's stealing your lunch!  In 
+# this project, we will use the GrovePi to take a picture of the culprit when the light in 
+# your fridge turns on.  We will use the light detector for Grove to detect when the fridge
+# door has been opened.
+#
+# Hardware Setup: 
+# - Use the Raspberry Pi and GrovePi.  	(http://www.dexterindustries.com/shop/grovepi-starter-kit-2/)
+# - Use the Raspberry Pi camera.	(http://www.dexterindustries.com/shop/raspberry-pi-camera/)
+# - Connect the light sensor to A0. (http://www.dexterindustries.com/shop/grove-light-sensor/)
+# You can adjust the threshold value if you have a bright environment.  
+# Change the email_destination to change the destination you send an e-mail to.  
+
+import time
+import datetime
+import grovepi
+import picamera
+import send_email_pic
+
+email_destination = 'examples@dexterindustries.com'		# Change this to the destination e-mail.
+destination = [email_destination] 						# We put it into an array.
+
+# Connect the Grove Light Sensor to analog port A0
+# SIG,NC,VCC,GND
+light_sensor = 0										# Connect the light sensor to A0 Port.
+grovepi.pinMode(light_sensor,"INPUT")					# Set the A0 port to input.
+
+# Send a picture once sensor exceeds threshold resistance
+threshold = 600											# Adjust this threshold higher or lower
+														# Depending on how bright your fridge is.
+
+camera = picamera.PiCamera()							# Setup the Pi Camera
+
+# Simple function to get the date as a string.
+def get_time_string():
+    dateString = '%Y-%m-%d_%H-%M-%S'
+    return_string = datetime.datetime.now().strftime(dateString)
+    return return_string
+
+while True:
+    try:
+        # Get sensor value.  Read the light sensor.
+        sensor_value = grovepi.analogRead(light_sensor)
+
+        # Sense the light coming on, within the target range
+        if sensor_value > threshold:
+            print ('The fridget light is on!')	# Print a note to let us know how it goes.
+            file_name = "lunch_status-"+str(get_time_string())+".jpg"
+            camera.capture(file_name)			# Take a picture and save it to file_name
+            # Now send an e-mail
+            send_email_pic.send_email("The fridge has been opened!", destination, "The fridge has been opened!", file_name)
+        else:
+            print ('.')	# Do nothing!  It's still dark.
+        
+        time.sleep(.5)	# If your hold time is less than this, you might not see as many detections
+
+    except IOError:
+        print ("Error")