Project Hub /Robotics & Autonomous Systems/Motor Drivers & Motion Control/Motor Controller Using Webserial

Intermediate

ESP32

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

Motor Controller Using Webserial

A web-controlled DC motor system using an ESP32 and WebSerial for remote operation, direction control, and speed regulation.

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
L298N Dual H-Bridge Motor Driver Module – 2A Rs. 195.00
3–6V R140 DC Motor (High-Speed DIY & Toy Motor) Rs. 49.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
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: 9V Battery + Snap

Browse all components

How It Works

This project creates a web-controlled motor system by combining the ESP32 DevKit v1 microcontroller with an L293D motor driver and dual 9V DC motors. The ESP32 acts as the central processing unit and hosts a local web server utilizing the ESPAsyncWebServer and WebSerial libraries. When a user interacts with the browser-based interface hosted by the ESP32, commands are sent over a Wi-Fi network to the microcontroller. The ESP32 processes these inputs and translates them into appropriate control signals. Because the microcontroller's digital output pins cannot supply enough current or voltage to drive DC motors directly, it uses the L293D motor driver as an intermediary power stage. The L293D receives low-power control logic from the ESP32 and uses the external 9V battery to supply the higher current necessary to drive the two 9V DC motors. By altering the logic signals sent to the L293D, the system can independently manage motor direction and regulate speed, allowing for remote operation entirely through a web browser.

Why Build This

Design responsive web-based control dashboards to operate physical hardware remotely over a local wireless network.

Implement bidirectional motor control and speed regulation using an intermediate H-bridge driver IC.

Integrate asynchronous web server frameworks with microcontroller firmware for real-time IoT applications.

Real-World Application

Robotics, home automation, and industrial systems requiring precise remote motor control over a web-based interface.

Skills You'll Learn

Asynchronous web server development

Wi-Fi microcontroller programming

H-bridge motor driver interfacing

pulse-width modulation speed regulation

power distribution management

Safety Precautions

Ensure robust power management to handle motor currents and prevent short circuits when connecting batteries and motor drivers.

Technology Tags

ESP32

WEBSERIAL

DC MOTOR

L293D

MOTOR DRIVER

H-BRIDGE

IOT

WEB SERVER

C++

ARDUINO

Frequently Asked Questions

Can I power the ESP32 and the motors using the same 9V battery?

While the 9V battery powers the L293D and the motors, the ESP32 should ideally be powered via its USB connection during programming and testing to ensure a stable logic voltage.

How do I access the web control interface?

Once the ESP32 connects to your local Wi-Fi network and runs the sketch, you can open the Arduino IDE Serial Monitor or WebSerial interface to view the assigned IP address, which you then enter into any web browser on the same network.

Why is an L293D motor driver necessary instead of connecting the motors directly to the ESP32?

ESP32 GPIO pins operate at 3.3V and can only supply a few milliamps of current, which is far too weak to drive 9V DC motors and would instantly damage the microcontroller.

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.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-00996