Final Year Project (P2P Payment System using Light Communication)

This is a final year project for implementing p2p payment application using visible light communication for android.

Environment

• Python 3.10
• MS SQL database server on Azure
• Android Studio Dolphin | 2021.3.1 Patch 1 Build #AI-213.7172.25.2113.9123335, built on September 30, 2022
• 2 x Samsung S20 FE(SM-G7810) Android Version 13

Installation

1. Set Up Database and Authority Server

1. Set up MS SQL database server.
2. Use setup_database.sql to inject the database schema
3. Change environment variables in ./authority server/.env to connect to the database

db_server = address to the database server
db_database = database name
db_username = username to connect to the database
db_password = password to connect to the database
db_driver = driver used for python to connect to SQL server

3. install required packages for authority server using requirements.txt

pip install -r requirements.txt

2. Install Application on Android Device

1. Using Android Studio, open ./VLC P2P Payment/MyApplication/ directory
2. After opening the project, open app/java/com.example.myapplication/APIRequest.java
3. Modify the server address in the code to point to the authority server's address with port 8000 in line 33

public class APIRequest {
    private String server = "http://{your server IP address}:8000";
...

4. Connect Android device to the computer and run the application

Usage

1. Run the Authority Server

Run the main.py to start the FastAPI server

python3 main.py

2. Run the Android Application

1. Tap on the application on the main screen
2. Application Main

3. Receive Money

1. Login to the application first
2. Tap on Receive button
3. Enter the amount and tap confirm
4. After camera starts, align it with the payer's camera
5. After completion, check the transaction result

4. Send Money

1. Align the camera with the receiver's camera
2. Tap on the send button on the main page
3. Receive data through VLC
4. After checking payment detail, tap on Confirm to send moeny, or Reject to reject the transfer request