ESP32 Expansion Board 38 Pins – GPIO Breakout Board for ESP32-WROOM-32

The ESP32 Expansion Board 38 Pins is a versatile breakout and base board designed for 38-pin ESP32-WROOM-32 / ESP32-S development modules. It brings out all GPIO, power, and ground pins to labeled dual-row headers, making it easy to connect sensors, actuators, and peripheral modules for IoT, robotics, and embedded development projects.

Key Features

• Designed for 38-pin ESP32-WROOM-32 / ESP32-S development modules
• Compatible with both 0.9″ and 1.0″ wide ESP32 boards
• Dedicated VCC and GND pins alongside each GPIO signal pin
• Selectable 3.3V or 5V output via onboard jumper
• Three power input options: USB Type-C, Micro USB, and DC jack
• Onboard 5V voltage regulator with reverse polarity protection
• Onboard power-on LED indicator
• Breadboard-friendly, solder-free connection layout
• M3/M4 mounting holes for secure installation
• Easy integration with sensors, relays, displays, and industrial modules

Technical Specifications

Applications

• ESP32 IoT Development
• Home Automation Systems
• Robotics and Motor Control Projects
• Sensor and Relay Module Interfacing
• Rapid Prototyping and Breadboard Testing
• Educational and Learning Projects
• Wireless Wi-Fi and Bluetooth Applications
• Industrial and Embedded Control Systems

Important Notes

• Compatible only with 38-pin wide ESP32-WROOM-32/ESP32-S boards; not suitable for narrow 30-pin ESP32 DevKit V1 boards.
• The ESP32 development module is not included unless stated otherwise.
• USB connectors on the expansion board provide power only; program the ESP32 using its own onboard USB port.
• Set the voltage jumper correctly (3.3V or 5V) before connecting external modules.
• Keep DC jack input within a safe range to avoid excess heat in the onboard regulator; do not exceed the ESP32 module’s rated input voltage.
• Do not power the board through multiple input sources simultaneously.