ECE 477 Team 4: Ultimate Vending Machine Project
This project by Team 4 explores the implementation of an ultimate vending machine with a new payment system. The machine offers two methods for users to acquire items: via an Android app for ordering and paying, or by scanning generated QR codes. The team faced design challenges such as PCB design, transmission protocols, and software integration, with each member contributing expertise in hardware, system engineering, and software development to bring the project to life.
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Presentation Transcript
<Add team picture or relevant project picture here> ECE 477 FINAL REVIEW: TEAM 4
OUTLINE Project Overview Block Diagram Design Challenges Individual Contributions Project Demonstration Q & A
PROJECT OVERVIEW Ultimate vending machine implementing with new payment system Provides two methods to pick up merchandise. Order and pay for items through an Android app. QR code and receipt code will be generated on Android app. Scan the QR code or enter the receipt code to pick up item. A mechanism can detect failure of dropping item.
DESIGN CHALLENGES PCB design Transmission Protocols UART Microcontroller to Raspberry Pi Raspberry Pi Google cloud message usage Camera libraries installation Raspberry Pi Wi-Fi connection Android application Information auto update QR code generation and recognition
INDIVIDUAL CONTRIBUTIONS Team member position Team member position Team Leader - Ruotong Ji Hardware engineer - Yaqin Huang System engineer - Renjun Zheng Software engineer - Xingyu Zhou
INDIVIDUAL CONTRIBUTIONS Ruotong Ji Ruotong Ji PCB Design Schematic and trace routing of PCB PCB troubleshooting Microcontroller Whole microcontroller algorithm design and framework setup Microcontroller programming including ATD, SPI, UART Test UART send and receive data with RPi Packaging Prepared the materials for vending machine Aided in assembling the box Packaging troubleshooting
INDIVIDUAL CONTRIBUTIONS Yaqin Huang Yaqin Huang PCB design Designed the circuits for LCD screen, force sensor, Keypad, motor driver and motor Checked the design of PCB Soldered the PCB Microcontroller Programed code for motor and motor driver part with PWM Packaging Prepared the materials for vending machine Aided in assembling the case Packing troubleshooting
INDIVIDUAL CONTRIBUTIONS Xingyu Zhou Xingyu Zhou Raspberry Pi Configure pins to send data to microcontroller Test UART send and receive data with microcontroller Associate Renjun with RPi Database Create the database and design the layout of the database Server Write functions to interact with the database Packaging Aided in designing the layout Aided in assembling the box
INDIVIDUAL CONTRIBUTIONS Renjun Zheng Renjun Zheng Android App Design and created user interface. Integrated QR code generation with ordering system. Implemented item quantity and purchase history auto update. Server Realized communication between server and Android app. Utilized Raspberry Pi camera module for QR code recognition. Database Refactored some server and database communication code. Packaging Drafted and drawn vending machine structure. Prepared and assembled part of the machine.
PROJECT DEMONSTRATION 1. An ability to generate a unique encrypted receipt code when users order on the phone using the mobile app. 2. An ability to accept receipt code using keypad input on the machine. 3. An ability to select correct item and push the item to the output port by rotating spring. 4. An ability to use weight sensor to detect item dropped. 5. An ability to transmit receipt code between microcontroller and Raspberry Pi
