The ESP32-WROOM-32E is a high-performance, student-friendly development board specifically engineered for STEM education and LEGO robotics. Featuring the latest 2023 version of the ESP32-WROOM-32E module, this board combines powerful dual-core processing with unique mechanical and electrical compatibility for LEGO ecosystems.
Technical Specifications
| Parameter | Specification |
| Main Module | ESP32-WROOM-32E |
| Processor | Dual-core Xtensa 32-bit LX6 |
| Clock Frequency | 240MHz |
| Operating Voltage | 3.3V |
| Recommended Input Voltage | 6–9V DC |
| Supported Input Voltage | 6–12V DC |
| Power Input Interface | LEGO Battery Box Input |
| Digital I/O Pins | 20 |
| Analog Input Pins | 6 |
| Analog GPIO Pins | GPIO32, GPIO33, GPIO34, GPIO35, GPIO36, GPIO39 |
| Wireless Protocol | WiFi 802.11 b/g/n |
| Bluetooth | Bluetooth 4.2 BR/EDR/BLE |
| Flash | 4MB / 8MB / 16MB optional |
| SRAM | 520KB |
| RTC SRAM | 16KB |
| ROM | 448KB |
| Programming Interface | USB Type-C |
| Expansion Interface | 2.54mm G/V/S Headers |
| Programming Environment | Arduino IDE and other common programming platforms |
| Protection Design | Onboard circuit protection and power selection circuit |
| Recommended Users | Students, teachers, makers, robotics learners, STEM education providers |
Key Features
- Core Chip: ESP32-WROOM-32E (Dual-core Xtensa® 32-bit LX6, 240MHz)
- Memory: 448KB ROM, 520KB SRAM, 16MB/8MB/4MB Flash options
- Wireless: 2.4GHz WiFi (802.11 b/g/n) + Bluetooth 4.2 (BR/EDR/BLE)
- Input Voltage: 6V – 9V (Supports LEGO standard battery boxes and Lithium batteries)
- Output Power: Integrated 5V/2A (10W) high-current module for driving multiple servos and motors
- Interfaces: USB Type-C (reversible), G|V|S 3-pin headers, I2C, SPI, DC LEGO Battery Port
- Safety: Built-in PTC Resettable Fuse & reverse polarity protection
Projects You Can Build
- LEGO Compatible Intelligent Robot: Build a multi-functional robot using LEGO Technic parts and control it via WiFi or Bluetooth.
- Multi-DOF Robotic Arm: Use the 5V/2A high-current output to drive 4-6 SG90 servos simultaneously for complex grasping and movement tasks.
- AI Voice-Controlled Home: Leverage the dual-core 240MHz speed to process local voice commands or connect to cloud AI services to control household appliances.
- Autonomous Obstacle-Avoiding Car: Combine ultrasonic sensors and DC motors using the GVS interface for a high-speed, responsive smart vehicle.
Application Scenarios
- STEM Education: Designed for students learning programming, electronics, IoT, and robotics through hands-on projects.
- Building Block Robotics: Ideal for building block robots, smart cars, and programmable mechanical models that require battery-powered control.
- Maker and DIY Projects: Suitable for makers who need a compact ESP32 controller board with WiFi, Bluetooth, and easy sensor expansion.
- IoT Smart Home Projects: Can be used for smart lights, sensor monitoring, wireless switches, alarm systems, and remote control devices.
Why Choose Us
We provide reliable factory-direct supply for STEM education hardware, IoT development boards, robotics kits, and electronic modules. From product assembly to quality inspection, we focus on stable performance and consistent delivery for schools, distributors, and project-based learning programs.
FAQ
Q1: Can I plug my LEGO® battery box directly into this board?
A: Yes. The board is equipped with a specialized power port that is electronically and mechanically compatible with standard LEGO battery boxes (e.g., 8881, 88000). This allows students to power their intelligent robots using existing LEGO power sources without any wire cutting or soldering.
Q2: Is the board “Student-Proof”? What happens if a student shorts the wires?
A: We’ve integrated several safety features for the classroom:
PTC Resettable Fuse: Automatically disconnects the circuit if a short occurs, protecting the student’s laptop USB port.
Reverse Polarity Protection: Prevents damage if the battery box or power source is connected backward.
GVS Color-Coding: Ground (Black), Voltage (Red), and Signal (Yellow) headers make wiring errors easy to spot and avoid.
Q3: Which programming languages are supported for this board?
A: It is fully compatible with the most popular STEM platforms:
Graphical/Block-based: Perfect for beginners.
MicroPython/CircuitPython: Ideal for learning real-world coding.
Arduino IDE (C++): For advanced students and professional developers.
ESP-IDF: For high-end industrial-level development.
Q4: Does the module use a PCB antenna or an external antenna?
A: This board uses the ESP32-WROOM-32EA module. The “A” designation means it includes an IPEX/U.FL connector for an external antenna. This is critical for MOC robots where the controller might be buried deep inside a dense plastic LEGO structure, as it allows you to lead the antenna out for much better WiFi/Bluetooth range.
Q5: Can this board be used for IoT projects, or is it only for robots?
A: It is a full-featured IoT powerhouse. Because it uses the original ESP32-WROOM-32E core, it has built-in WiFi and Dual-mode Bluetooth. You can use it as an IoT gateway, a smart home controller, or a data logger while still utilizing the high-power GVS headers for sensors.
