Adafruit HUZZAH32 ESP32 Feather Board

ESP32 Feather board based on the WROOM32 module with built-in USB-to-serial, auto-bootloader reset, and Li-Ion/Li-Po charging. Exposes most GPIOs for use with FeatherWings.

GND
Common ground for all power and logic on the HUZZAH32 Feather.
Type · groundVoltage · 0V
BAT
Positive voltage to or from the JST jack for an optional LiPo battery.
Type · powerVoltage · LiPo battery rail
USB
Positive voltage to or from the micro USB jack when connected.
Type · powerVoltage · USB supply rail
EN
3.3V regulator enable. Adafruit Learn states it is pulled up and can be connected to ground to disable the regulator.
Type · controlVoltage · 3.3V enable control
3V
Output from the 3.3V regulator. Adafruit Learn notes the regulator can supply 500mA peak, with the ESP32 drawing part of that budget.
Type · powerVoltage · 3.3V output

ESP32

110 other options

Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.

View all 110

ESP32-C3 Super Mini visual preview
ESP32-C3 Super Mini

Related groups

4 groups

Arduino

About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.

Boards · Arduino boards · 76 parts

Add-ons

About 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.

Boards · HATs, Shields & add-ons · 272 parts

Other MCUs

Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.

Boards · Other MCU boards · 226 parts

Pi Pico

The Raspberry Pi MCU line — Pico, Pico 2, and third-party boards on the same silicon — plus a deep bench of Pico-pinout displays, loggers, and radio modules that do nothing without a Pico plugged in.

Boards · Pico & RP2040 boards · 44 parts

Pin	Type	Function	Voltage
GND	ground	Common ground for all power and logic on the HUZZAH32 Feather.	0V
BAT	power	Positive voltage to or from the JST jack for an optional LiPo battery.	LiPo battery rail
USB	power	Positive voltage to or from the micro USB jack when connected.	USB supply rail
EN	control	3.3V regulator enable. Adafruit Learn states it is pulled up and can be connected to ground to disable the regulator.	3.3V enable control
3V	power	Output from the 3.3V regulator. Adafruit Learn notes the regulator can supply 500mA peak, with the ESP32 drawing part of that budget.	3.3V output
RX	signal	Additional Serial1 receive pin, input into the ESP32 module and not connected to the USB/serial converter.	3.3V logic, not 5V safe unless otherwise specified
TX	signal	Additional Serial1 transmit pin, output from the ESP32 module and not connected to the USB/serial converter.	3.3V logic, not 5V safe unless otherwise specified
I2C pins	signal	ESP32 I2C interface pins for sensors and peripherals. Adafruit Learn notes the I2C pins do not include onboard pullups.	3.3V logic, external pullups required for I2C
SPI pins	signal	ESP32 SPI interface pins for sensors, outputs, and peripherals using the standard SPI library.	3.3V logic, not 5V safe unless otherwise specified
A0-A12 / GPIO	signal	General-purpose GPIO and analogue input pins exposed on the Feather headers, as documented by the Adafruit Learn pinout.	3.3V logic; analogue input limits per ESP32 pinout
A13 / VBAT sense	signal	External analogue input A13 / GPIO35 through a resistor divider connected to the VBAT line.	scaled VBAT sense input

Pinout

Arduino

Add-ons

Other MCUs

Pi Pico