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

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.