Mom’s Tray is a dietary monitoring system that integrates smart tray with embedded sensors, pre-arranged and RFID-tagged food packages, and a mobile app to provide a real-time feedback on food ordering and conumption in a school cafeteria setup. The smart tray deploys ESP8266 microcontroller board, MFRC522 RFID reader module (13.56 MHz), and FSR-406 force sensor. It uses passice RFIDNFC tags to track food products placed on the tray. Additionally, a smartphone was equipped with a NSF tag is used to associate it with the tray--matching trays and users. The force sensor measures the weight of the dish. Microcontroller collects and transmits sensor data and food IDs to the MySQL database. On the server side, dish IDs are matched with types of food and their nutritional information.
An Android app provides real-time interactions between Mom’s Tray users and the tray hardware. The application imports sensor data from an outside database and shows it to the user in an interactive way. The app’s user interface (UI) is composed of three vignettes-tabs personal record, statistics, and user settings. The record tab shows total amount of each each nutritious category that is present on the tray. Nutritious information includes energy in kilocalories, carbohydrate, protein, fat, sodium, and cholesterol. The statistics tab shows user’s history of consumption both as a daily and weekly tallies. Users can interact with the charts to get additional information.
The app can be customized using settings tab, which allows the users to input their personal information such as their physical state (e.g., gender, height, weight, and physical activities in usual) and goal of weight management. With the values, the application calculates the recommended intake of calories and uses it in other tabs. Additionally, users can specify their food-related constraints such as the type of allergies. Based on the information, the app warns users if they choose foods that may cause allergic reactions.
Student Developer: Gyuwon Jung (KAIST)
Instructors: Andrzej Zarzycki (NJIT) & Ji-Hyun Lee (KAIST)
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