An Easy Way to Control Servo Motor

Introduction

Controlling a servo motor remotely is a foundational project for anyone interested in robotics, automation, or remote control systems. Servos offer precise position control, making them ideal for applications like robotic arms, camera mounts, or door locks. This project is perfect for beginners because it involves straightforward wiring, simple Arduino code, and intuitive control via BluetooIno’s Buttons or Terminal Controller. You’ll gain hands-on experience with PWM signals and Bluetooth serial communication while building something practical and fun.

How it works

You start by connecting your phone to the HC-05 Bluetooth module through BluetooIno. Selecting the Buttons Controller lets you assign specific commands to buttons that correspond to servo positions. When you press a button, BluetooIno sends the matching command wirelessly over Bluetooth. The Arduino receives these commands via its serial interface and translates them into PWM signals to set the servo’s angle. For example, sending the command "90"instructs the servo to move to the 90-degree position. This live control loop enables smooth, wireless manipulation of the servo motor from your phone.

Wiring the project

1.Connect the HC-05 module’s TX pin to Arduino RX (pin 0) and the RX pin to Arduino TX (pin 1).

2.Connect the HC-05’s VCC and GND to the Arduino’s 5V and GND.

3.Connect the servo motor’s signal wire (usually yellow or white) to Arduino pin 9.

4.Connect the servo motor’s power (red) and ground (black or brown) to a 5V power source and GND respectively.

5.It’s recommended to use an external power supply for the servo to avoid drawing too much current from the Arduino board.

Ensure all grounds (Arduino, servo, HC-05) are connected to a common ground to prevent erratic behavior.

Before powering up, double-check that the servo can rotate freely without obstructions.

Upload an Arduino sketch that reads incoming serial commands and uses the Servo library to set the servo’s angle based on the received command values.

Conclusion

Controlling a servo motor via Bluetooth with BluetooIno is a rewarding beginner project that combines hardware, software, and wireless communication fundamentals. Whether you want to build a robotic arm, automated pet feeder, or just experiment with servo control, this project provides an accessible, hands-on introduction. BluetooIno simplifies the command interface, making it easy to get started and customize controls. Download BluetooIno and bring your servo projects to life with your phone today!