Adafruit Feather HUZZAH ESP8266 User Manual

Add the breakout board:
Place the breakout board over the pins
so that the short pins poke through the
breakout pads
And Solder!
Be sure to solder all pins for reliable
electrical contact.
(For tips on soldering, be sure to check
out our Guide to Excellent
Soldering(https://adafru.it/aTk)).
©Adafruit Industries Page 17 of 53

Adafruit Feather HUZZAH ESP8266 Specifications

General

Brand	Adafruit
Model	Feather HUZZAH ESP8266
Category	Microcontrollers
Language	English

Summary

Pinout Guide

Power Pins

Details pins for power and logic, including GND, BAT, USB, and EN.

Logic Pins

General purpose I/O pins with 3.3V logic, not 5V safe.

Serial Pins

Pins for serial communication and bootloading via USB-Serial chip.

I2C & SPI Pins

GPIO Pins

Details 9 general purpose GPIO pins, their special functions and boot mode behavior.

Power Management

Battery and USB Power

Powering the Feather via MicroUSB or LiPo battery with auto-switching.

Power Supply Options

Alternative Power Sources

NodeMCU Lua Programming

Serial Console Setup

Guide to connecting and using serial terminal programs like PuTTY.

WiFi Scanning and Connection

WebClient HTTP Example

Arduino IDE Usage

USB Driver Installation

Instructions for installing CP2104 USB-Serial drivers, especially for macOS.

IDE and ESP8266 Board Setup

ESP8266 Board Configuration

Arduino WiFi Connection

ESP8266 Troubleshooting FAQ

Pin Behavior and Boot Modes

Explains pin behavior during boot and potential issues.

Board Crashing and Resetting

Discusses power failure as a common cause for board crashes.

Serial Port Detection Issues

Troubleshooting steps for finding the serial port on a computer.

Mac Compilation Error Fix

Fixes for 'no such file' errors when compiling on macOS.

Serial Console Gibberish

Arduino IDE Upload Problems

Stuck in Bootloader Mode

Solutions for being stuck in bootloader mode and unable to upload.

Lua Command Response Fixes