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 progam the microcontroller using the Arduino IDE for an easy-
to-run Internet of Things core. We wired up a USB-Serial chip that can 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, we added a connector for any of our 3.7V
Lithium polymer batteries and built in battery charging. 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 its available.
©Adafruit Industries Page 6 of 53
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