Product

Quick summary:

1. Three components: photoresistor (SENSOR, INPUT), beeper(OUTPUT), resistor

2. Sensor data is available on Particle cloud and can trigger TWILIO API to send messages to the user.

3. Local feedback: beeper generate NOKIA TONE

The product will alert you locally by playing NOKIA TONE for 3 times if you leave your door open for more than 5 mins (3s in my current code). If you close the fridge door, it will not play another time. If you fail to close the door before the 3rd NOKIA TONE ends, you will receive an SMS. If you ignore all of these alerts, you will hear the alert and receive SMS every 20mins (1 min in my current code).

Nice :)

Here are videos: