Arduino Bluetooth Robot: Parts and Design Overview

An Arduino Uno, HC-05 Bluetooth module and dual-motor driver can form the basis of a phone-controlled rover. This article outlines the concept and does not present a tested circuit.

🛠️ Bill of Materials

Concept parts: Arduino Uno; HC-05 Bluetooth serial module; L298N dual-motor driver; two-wheel chassis with DC gear motors; prototype board and leads. Use a manufacturer-approved low-voltage power arrangement matched to the selected hardware. The earlier power suggestion was inconsistent and has been withdrawn. Check the exact module documentation before treating this as a build list.

🔌 Circuit Design & Connections

The motor driver controls the two motors while the Bluetooth module carries commands to the Arduino. Connections and voltage requirements depend on the exact module versions. The earlier pin list has not been validated as a complete circuit.

Connection checklist: identify the exact module revisions, verify their supply and logic requirements in manufacturer documentation, and draw a complete schematic before wiring. Have the power section reviewed separately. The earlier pin and power instructions were inconsistent and have been withdrawn. This page does not provide a build-ready pin map.

Firmware design checks

The earlier pasted code block was malformed and had no verified fail-safe behaviour. It has been withdrawn. A working sketch needs a validated pin map, a stopped initial state, command handling and a safe response to lost control.

Phone control considerations

Phone control is a separate software task. A suitable interface must send commands that match the verified firmware and provide an obvious stop control. The earlier app and pairing instructions were generic and untested for this specific build. Confirm compatibility with the exact Bluetooth module and phone before describing the project as complete.

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