Building an ESP32-Based RC Car Using Design Patterns

Introduction

Creating an RC car with an ESP32, TT motors, and a game controller is an exciting project that combines software engineering principles with embedded systems. To ensure our code is scalable, maintainable, and configurable, we will employ key software design patterns such as Strategy, Observer, Singleton, Factory, and Command. This project provides a structured approach to building an object-oriented and highly modular RC car system.

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Project Overview

Our RC car consists of the following components:

• ESP32 microcontroller (handles motor control, servos, and Bluetooth communication).
• Two Arduino TT Motors (one for the front wheels, one for the rear wheels).
• Two Servos (one for front steering, one for rear steering).
• L298N Motor Driver (controls the motors based on ESP32 signals).
• Game Controller (provides user input via Bluetooth; can be PS4, Xbox, or other controllers).
• 2 Pairs of 2.7V Batteries (power supply for motors and electronics).

Challenges:

• Making the system configurable (e.g., different pin assignments).
• Keeping the code clean and extensible.
• Managing different components efficiently.
• Implementing an event-driven architecture for smooth control.

To solve these, we structure our code using design patterns that promote reusability and modularity.