Espressif ESP8266 Series User Manual

About This Guide
This document provides technical description of ESP8266 series products including
ESP8266EX, ESP-LAUNCHER and ESP-WROOM, including the following topics:
Release Notes
Chapter
Title
Subject
Chapter 1
ESP8266EX
Hardware description on ESP8266EX chipset including.technical
specifications, pin definitions, layout, and typical applications.
Chapter 2
ESP-LAUNCHER
Technical description on ESP-LAUNCHER with ESP8266EX built-in.
Chapter 3
ESP-WROOM
Technical description on ESP-WROOM-01 and ESP-WROOM-02
with ESP8266EX.
Date
Version
Release notes
2015.12
V1.3
First release.
2016.01
V1.4
Sections 1.5.2, 1.5.3 & 1.6 updated.
2016.06
V1.5
Section 3.1 updated.

Espressif ESP8266 Series Specifications

General

RAM	50 KB
Wi-Fi	802.11 b/g/n
GPIO Pins	17
ADC	1
ADC Resolution	10-bit
I2S	Yes
Operating Temperature	-40°C to +125°C
Clock Speed	80 MHz (can be overclocked to 160 MHz)
Flash Memory	External, up to 16 MB
Operating Voltage	3.0V to 3.6V
I2C	Yes (software implementation)
UART	2
Deep Sleep Power Consumption	10 µA
Dimensions	Varies depending on module
Processor	Tensilica L106 32-bit