Bluetooth Motor & Servo Control with BBC Micro:bit

This project was developed as part of UQD10801 – ROBOCON I coursework.
It demonstrates real-time hardware control using a BBC Micro:bit, receiving commands over Bluetooth and driving DC motors and a servo.

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Overview

The Micro:bit interprets UART commands over Bluetooth (e.g., up, down, left, right, stop) and converts them into PWM and digital signals to control motors and a servo.
This setup can be used to control small robotic vehicles or prototypes requiring simple remote actuation.

Features

• Bluetooth UART command handling
• PWM-based DC motor speed and direction control
• Servo angle control
• Real-time response suitable for small robotic platforms

Hardware Example

BBC Micro:bit starter kit used for the project.

• vehicle*

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Development Environment

• Platform: Microsoft MakeCode (TypeScript)
• Target Device: BBC Micro:bit
• Hardware: DC motors, standard hobby servo, motor driver module

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Getting Started

To explore or modify the firmware:

1. Go to MakeCode for Micro:bit
2. Click Import → Import URL
3. Paste: https://github.com/alnezar/kart-microbit-motor-control
4. Open the project and view or edit the code directly in the browser

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Key Learnings

• Parsing and handling Bluetooth UART commands on a constrained device
• Implementing PWM for motor speed and servo angle control
• Understanding timing and responsiveness limitations of Micro:bit hardware
• Basic integration of software commands to physical actions

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