Website: https://ece4180.sousys.com

Introduction

In this project, we designed and implemented a GPS Tracker with a backend server and UI. The GPS tracker is a mbed LPC1768 based device equipped with GPS and Wifi module. This project allows a user to visualize their history trips and running trips at realtime.

Team Members

• Nan Qin
• Charles Austin

Implementation

The project contains three components, the mbed device with a GPS module, a backend server with an SQLite database, a frontend webpage. Besides the GPS module, the mbed device is also equipped with a Wifi module to have Internet access. Moreover, each device has a hardcoded deviceId. When a device starts running, it sends an HTTP GET request /home/startnewtrip/{deviceId} to the server to obtain a tripId. After the server receives the request, the server initializes a trip and return its tripId to the mbed device. Once the mbed acquires a tripId, it can send GPS location by HTTP GET /realtime/uploadposition/{tripId}/{latitude}/{longtitude}.

There are two types of trips in our design. The first type is realtime trip, meaning the trip is in running state. Realtime trip the default type after a trip is initialized by the server. The second type is terminated trip. When a user decides to end a trip, the mbed can send an HTTP GET /home/endtrip/{tripId}.

The frontend webpage allows users to visualize a trip by selecting its tripId. For a realtime trip, the webpage pulls the latest GPS data from the server periodically. For a terminated trip, the pulling only happens once.

Parts

• Mbed LPC1768
• Adafruit HUZZAH ESP8266 Breakout
• u-blox NEO-6M GPS Module

Wiring

Mbed Code

Frontend and Server Code

https://github.com/Nan0416/ECE4180-GPS-tracker

Demo