Espressif ESP8266 Matching Guide

About This Guide
This document introduces frequency offset tuning and antenna impedance matching for
ESP8266 in order to achieve optimum RF performance.
Release Notes
Chapter
Title
Subject
Chapter 1
Overview
Relevance of frequency offset adjustment and impedance
matching.
Chapter 2
Frequency Offset Tuning
Introduction to frequency offset testing and tuning methods.
Chapter 3
Antenna Matching
Introduction to antenna impedance matching.
Date
Version
Release note
2016.06
V1.0
First release.

Espressif ESP8266 Specifications

General

Digital I/O Pins	17
Analog Input Pins	1
Wi-Fi	802.11 b/g/n
Operating Voltage	3.0V - 3.6V
Clock Speed	80 MHz / 160 MHz
Operating Temperature	-40°C to 125°C
Dimensions	24mm x 14mm
Processor	Tensilica L106 32-bit micro controller