FridgeHound - The Smart Tupperware

Authors:

Orlando G. Rodriguez, Pedro Henrique Ribeiro Pinto

Description

Have you ever forgotten something on the fridge and by time you opened it the food had gone bad? Or maybe you opened a tupperware and wasn't too sure if the food was still good? Well, you are not alone. The average american household wastes around 25% of the food they purchase. This was the main reason why we decide to create FridgeHound. FridgeHound is a Smart Tupperware that uses the mq-135 gas sensor to track your food. With an easy to use interface you can store different type of foods and the sensor will estimate how much time you have left. We also added a thermometer so you can keep track of your fridge's temperature. The best part is that you can access all this information from a web application anywhere you go. The gas sensor and thermometer send information via serial usb to a Raspberry Pi 2, which sends that information to our web application's database. This way, you always have the most up to date information anywhere you go.

System Diagram

Hardware Components

Hardware Prototype

Pin-out Connections

• Gas Sensor (MQ-135):

Mbed	SD
p15	out
GND	GND
Vout	Vcc
VU	5V

• Temperature sensor (TMP-36):

Mbed	MQ-135
GND	GND
Vout	3.3V
P18	Out

• uLCD Connections:

Mbed	uLCD
VU	5V
GND	GND
Tx=P9	RX
Rx=P10	TX
P11	Reset

• Up Pushbutton Connections:

Mbed	Up Pushbutton
P8	P1
GND	P2

• Down Pushbutton Connections:

Mbed	Down Pushbutton
P28	P1
GND	P2

• Left Pushbutton Connections:

Mbed	Left Pushbutton
P29	P1
GND	P2

• Right Pushbutton Connections:

Mbed	Right Pushbutton
P24	P1
GND	P2

• Select Pushbutton Connections:

Mbed	Select Pushbutton
P20	P1
GND	P2

• Homepage Pushbutton Connections:

Mbed	Homepage Pushbutton
P19	P1
GND	P2

• USB Serial Connection:

Mbed	Raspberry Pi
USB mini Out	USB 2.0 In

Demos

• Smart Tupperware:

• Web Interface: