Datasheet
Table Of Contents
- Guide Contents
- Overview
- Pinouts
- Power Pins
- Logic pins
- Serial pins
- I2C & SPI pins
- GPIO pins
- Analog Pins
- Other control pins
- NC Pins
- Assembly
- Header Options!
- Soldering in Plain Headers
- Soldering on Female Header
- Power Management
- Battery + USB Power
- Power supplies
- Measuring Battery
- ENable pin
- Using NodeMCU Lua
- Open up serial console
- Hello world!
- Scanning & Connecting to WiFi
- WebClient example
- Using Arduino IDE
- Install the Arduino IDE 1.6.8 or greater
- Setup ESP8266 Support
- Blink Test
- Connecting via WiFi
- Downloads
- Datasheets & Files
- More info about the ESP8266
- Schematic
- Fabrication Print
- ESP8266 F.A.Q.
- When I connect stuff to some of the pins, the Huzzah stops working. Whats up with that?
- My Huzzah board keeps crashing and resetting, whats up with that?
- I can't seem to find the Serial port on my computer for the Feather HUZZAH?
- I still can't seem to find the Serial port on my computer for the Feather Huzzah!
- So, I’m getting a 'no such file' error compiling for ESP8266 on my Mac
- Whenever I start or reset the ESP8226 there's a bunch of "gibberish" on the Serial console
- I'm having difficulties uploading to the HUZZAH with the Arduino IDE
- I tried that, but I'm still having difficulties uploading with the Arduino IDE
- I'm stuck in bootloader mode and can't upload
- I can't get Lua to respond to my commands
Power Management
Battery + USB Power
We wanted to make the Feather HUZZAH easy to power both when connected to a computer as well as via battery.
There's two ways to power a Feather. You can connect with a MicroUSB cable (just plug into the jack) and the Feather
will regulate the 5V USB down to 3.3V. You can also connect a 4.2/3.7V Lithium Polymer (Lipo/Lipoly) or Lithium Ion
(LiIon) battery to the JST jack. This will let the Feather run on a rechargable battery. When the USB power is powered,
it will automatically switch over to USB for power, as well as start charging the battery (if attached) at 100mA. This
happens 'hotswap' style so you can always keep the LiPoly connected as a 'backup' power that will only get used
when USB power is lost.
The JST connector polarity is matched to Adafruit LiPoly batteries. Using wrong polarity batteries can destroy
your Feather
© Adafruit Industries https://learn.adafruit.com/adafruit-feather-huzzah-esp8266 Page 23 of 42