Description
The Adafruit Feather HUZZAH ESP8266 is Adafruit’s take on an ‘all-in-one’ ESP8266 WiFi development board with built in USB and battery charging. It’s an ESP8266 WiFi module with all the extras you need, ready to go!
At the Feather HUZZAH’s heart is an ESP8266 WiFi microcontroller clocked at 80 MHz and at 3.3V logic. This microcontroller contains a Tensilica chip core as well as a full WiFi stack. You can program the microcontroller using the Arduino IDE for an easy-to-run Internet of Things core. We wired up a USB-Serial chip that an upload code at a blistering 921600 baud for fast development time. It also has auto-reset so no noodling with pins and reset button pressings.
To make it easy to use for portable projects, they added a connector for any of the 3.7V Lithium polymer batteries we stock and included a built in battery charging circuit. You don’t need a battery, it will run just fine straight from the micro USB connector. But, if you do have a battery, you can take it on the go, then plug in the USB to recharge. The Feather will automatically switch over to USB power when it is plugged in using a micro USB cable available.
As of January 2021 this is now Revision G, and includes a slightly improved power selection circuit. It will no longer back-power USB if a battery is plugged in.