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ESP32-WROOM-32 38Pin Development Board WiFi+Bluetooth Ultra-Low Power Consumption Dual Core

ESP32-WROOM-32 38Pin Development Board WiFi+Bluetooth Ultra-Low Power Consumption Dual Core

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SpecificationDetails
MicrocontrollerDual-core Tensilica Xtensa LX6 (32-bit)
Clock SpeedAdjustable from 80 MHz to 240 MHz
SRAM / Flash520 KB / 4 MB
WirelessWiFi 802.11 b/g/n + Bluetooth 4.2 (BR/EDR/BLE)
GPIO Count38 Pins (Maximum breakout)
Operating Voltage3.3V (Logic level)
Input Voltage5V (USB) or 5V–12V (via VIN pin)
Interfaces3x UART, 3x SPI, 2x I2C, 16x PWM, 2x DAC, 18x ADC
                                 Price

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₹ 355.93 ₹ 355.93
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Barcode: 64661

Product Description

The 38-Pin ESP32 is a significant upgrade over the 30-pin variant, providing additional access to the chip's internal features, including more touch sensors and ADC channels. It is powered via a Micro-USB port which also handles programming through an onboard USB-to-Serial converter (typically CP2102 or CH340). Its dual-core architecture allows one core to manage wireless stacks while the other handles user applications, ensuring smooth performance even during heavy data transmission.

Key Features

  • Dual-Core Multi-Tasking: Execute complex logic on one core while maintaining a stable WiFi/Bluetooth connection on the second.

  • Hybrid Connectivity: Built-in WiFi for cloud integration and Bluetooth Low Energy (BLE) for interacting directly with smartphones or tablets.

  • Maximum I/O Access: The 38-pin layout exposes nearly every usable pin on the ESP-WROOM-32 module, perfect for high-density projects.

  • Ultra-Low Power: Advanced power-management features allow the chip to consume as little as 5µA in deep sleep, making it ideal for battery-powered remote sensors.

  • Security Features: Includes hardware acceleration for encryption (AES, SHA-2, RSA), ensuring secure data transmission for IoT devices.

Technical Details

  • Dimensions: ~55mm x 28mm (wider footprint than 30-pin versions).

  • Onboard Sensors: Hall effect sensor, internal temperature sensor, and 10 capacitive touch-sensing GPIOs.

  • Programming Support: Fully compatible with Arduino IDE, MicroPython, Espressif IDF, and Lua.

Prototyping and Engineering Tips from Robogears

  • Breadboard Spacing Note: The 38-pin version is wider than the 30-pin version. When placed on a standard breadboard, it will likely cover all the holes on both sides. To prototype efficiently, use two breadboards side-by-side or use Female-to-Male Jumper Wires to extend the pins to a working area.

  • The 3.3V Logic Hard Rule: Like all ESP32 boards, the I/O pins are not 5V tolerant. If you are using 5V sensors (like many Arduino modules), you must use a Logic Level Converter to avoid destroying the chip.

  • Stable Power for WiFi: WiFi peaks can draw up to 500mA. If your code crashes when trying to connect to a network, check your USB cable and power source. A dedicated 5V/1A supply connected to the VIN pin is often more stable than a laptop USB port.

  • GPIO 0 and Booting: GPIO 0 is used to determine the boot mode. If you have a sensor or pull-down resistor attached to this pin, the board may fail to start or enter "programming mode" unexpectedly. Keep GPIO 0, 2, 5, 12, and 15 clear of heavy loads during startup.

Package Includes

  • 1 x ESP32-WROOM-32 WiFi + Bluetooth Development Board (38-Pin)

Disclaimer

Always verify the pin labels on the bottom of your specific PCB before wiring, as different manufacturers may arrange the ground and power pins slightly differently on 38-pin layouts.

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