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Wireless Control of BLDC Motor Using ESP32 and Web Interface

Build a wireless BLDC motor speed controller using an ESP32 microcontroller and a web-based interface.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

ESP32 WiFi+Bluetooth CP2102 Development Board Rs. 520.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
3–6V R140 DC Motor (High-Speed DIY & Toy Motor) Rs. 49.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Battery (generic / unspecified)
Drone Parts (ESC / propeller / flight controller / BLDC)

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How It Works

The Wireless Control of BLDC Motor project establishes a local Wi-Fi network using a NodeMCU ESP32 development kit, hosting a lightweight web server that is accessible from any browser-enabled device. When an undergraduate engineer or user interacts with the graphical interface on the web page, HTTP requests are sent to the ESP32. The microcontroller processes these incoming commands and translates them into precise Pulse Width Modulation (PWM) signals. These PWM signals are transmitted via jumper wires to the 30A Simonk Electronic Speed Controller (ESC). Because Brushless DC (BLDC) motors require specialized electronic commutation rather than simple DC voltage application, the Simonk ESC interprets the control pulses from the ESP32 to appropriately sequence power from the 3S 12V battery to the motor windings. This dynamic regulation allows the user to remotely start, stop, and vary the rotational speed of the BLDC motor in real time over the wireless connection.

Why Build This

Develop practical competence in deploying IoT-enabled embedded web servers for remote actuator control in autonomous robotics.

Gain hands-on experience interfacing microcontrollers with high-current electronic speed controllers (ESCs) and brushless DC motors.

Bridge theoretical knowledge of Pulse Width Modulation (PWM) and wireless communication protocols into a functional hardware application.

Real-World Application

Remote-controlled cars, drones, robots, and automated industrial systems.

Skills You'll Learn

ESP32 web server deployment

PWM signal generation

ESC motor control configuration

wireless IoT system integration

power distribution management

Safety Precautions

Exercise caution when working with 12V batteries and high-speed rotating motors.

Technology Tags

ESP32

BLDC MOTOR

PWM

WI-FI

WEB SERVER

ESC

ROBOTICS

Frequently Asked Questions

Can I power the ESP32 directly from the 3S 12V battery?

While the NodeMCU ESP32 development kit can sometimes accept higher voltages via its VIN pin, it is critical to verify the onboard voltage regulator limits or use a dedicated regulated power supply to avoid damaging the microcontroller.

Why is an ESC required instead of connecting the BLDC motor straight to the ESP32?

The ESP32 pins operate at 3.3V logic levels and can only supply minimal current, whereas BLDC motors require high currents and multi-phase AC-like commutation that only an Electronic Speed Controller (ESC) can provide.

How do I access the web interface once the code is uploaded?

You will connect your computer or smartphone to the Wi-Fi network hosted by the ESP32 (or connect the ESP32 to your local router) and navigate to the IP address printed in the Arduino IDE serial monitor.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

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