The Adafruit Feather HUZZAH ESP8266 is a compact Wi-Fi development board with fast USB programming, built-in battery charging, and full Arduino IDE support—perfect for portable IoT projects.
Feather is Adafruit’s lightweight, portable development board platform—thin, powerful, and designed to make battery-powered projects easy. The Adafruit Feather HUZZAH ESP8266 brings Wi-Fi into the Feather ecosystem, combining an ESP8266 module with built-in USB support and battery charging in a single, ready-to-use board.
At its core is the ESP8266 Wi-Fi microcontroller, running at 80 MHz with 3.3 V logic. This chip integrates a Tensilica processor and a complete Wi-Fi stack, making it an excellent choice for Internet-connected projects and IoT development. Programming is straightforward using the Arduino IDE, and the board also comes preloaded with the NodeMCU Lua interpreter for those who prefer Lua-based development.
For fast and reliable programming, the Feather HUZZAH uses a SiLabs CP2104 USB-to-Serial converter, capable of upload speeds up to 921600 baud. Auto-reset is built in, so there’s no need to manually toggle pins or press reset buttons. Compared to common alternatives like the CH340, the CP2104 offers better driver support and stable operation at high speeds.
Designed with portability in mind, the board includes a connector for 3.7 V lithium polymer batteries and onboard battery charging. It can run directly from the micro-USB connector, or switch automatically to USB power when available while recharging the battery. This makes it ideal for projects that need to move seamlessly between desk and field use.
Each Feather HUZZAH ESP8266 comes fully assembled and tested, with headers included so you can solder them on and plug the board straight into a breadboard. LiPo battery and USB cable are not included.
Features
ESP8266 @ 80MHz with 3.3V logic/power
4MB of FLASH (32 MBit)
Built in WiFi 802.11 b/g/n
3.3V regulator with 500mA peak current output
CP2104 USB-Serial converter onboard with 921600 max baudrate for speedy uploading
Auto-reset support for getting into bootload mode before firmware upload
9 x GPIO pins - can also be used as I2C and SPI
1 x analogue inputs 1.0V max
Built-in 100mA LiPoly charger with charging status indicator LED, can also cut a trace to disable the charger
Pin #0 red LED for general purpose blinking. Pin #2 blue LED for bootloading debug & general purpose blinking
Power/enable pin
4 mounting holes
Reset button
Specifications
22.8mm x 51mm x 7.2mm
Weight: 6.1g
Revision History
As of June 14, 2024 - We updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen. You may get the new PCB or the older version with vector fonts; both are identical other than the fancy silkscreen.
As of Oct 30, 2020 - we've revised the ESP8266 Feather to revision code G, and now has a better power selection circuit and will not back-power USB if a battery is plugged in!
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