Badgy

Abstract

1. Introduction

Since launching the first revision of Badgy, we have made various updates and fixes to the hardware and design. Refer to the diagram below to know which revision of Badgy you have. This is helpful for getting started and troubleshooting.

This is the latest revision of Badgy (September 2019) with a new display that supports 2-bit 4 color grayscale (Black/Dark Gray/Light Gray/White). It can be uniquely identified by the closed solder jumper on the back marked with the asterisk \. It also has a green tab on the screen protector film.

This revision of Badgy (May 2019) can be uniquley identified by the small green PCB on the bottom left corner. It supports programming over USB (updated from CH340 to CP2104, woohoo!) and WiFi OTA. It fixes the battery issue with Rev 2A.

2. Objective

Home of Badgy - IoT Badge

This project demonstrates how ESP8266, Arduino, Python can be applied to a real-world Internet of Things (IoT) problem.

4. Technology Stack

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

• Python 3.8 or later
• pip / virtualenv for dependencies
• VS Code, PyCharm or Jupyter Notebook
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/sqfmi/badgy.git
cd badgy

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

• Add a mobile dashboard using Blynk or Firebase
• Store readings in a cloud database for history charts
• Add alerts via SMS / Telegram when thresholds are crossed

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

1. Which microcontroller / board and sensors are used and why?
2. How does the device send data (Wi-Fi, MQTT, HTTP, Bluetooth)?
3. Where is the sensor data stored and visualised?
4. How is power consumption managed?
5. How would you secure the device and its communication?

9. Source Code & License

This project is developed by sqfmi and published on GitHub under the MIT License. Please follow the license terms and credit the original author when you use or modify this code.