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ESP8266 WiFi Module

The ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that's just out of the box)! The ESP8266 module is an extremely cost effective board with a huge, and ever growing, community.

This module has a powerful enough on-board processing and storage capability that allows it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, including the front-end module, is designed to occupy minimal PCB area. The ESP8266 supports APSD for VoIP applications and Bluetooth co-existance interfaces, it contains a self-calibrated RF allowing it to work under all operating conditions, and requires no external RF parts.

There is an almost limitless fountain of information available for the ESP8266, all of which has been provided by amazing community support. In the Documents section below you will find many resources to aid you in using the ESP8266, even instructions on how to transforming this module into an IoT (Internet of Things) solution!

Instructables Tutorial
http://www.instructables.com/id/Using-the-ESP8266-module

Features
     802.11 b/g/n
     Wi-Fi Direct (P2P), soft-AP
     Integrated TCP/IP protocol stack
     Integrated TR switch, balun, LNA, power amplifier and matching network
     Integrated PLLs, regulators, DCXO and power management units
     +19.5dBm output power in 802.11b mode
     Power down leakage current of <10uA
     Integrated low power 32-bit CPU could be used as application processor
     SDIO 1.1 / 2.0, SPI, UART
     STBC,    1x 1 MIMO,    2x 1 MIMO
     A-MPDU & A-MSDU aggregation & 0.4ms guard interval
     Wake up and transmit packets in < 2ms
     Standby power consumption of < 1.0mW (DTIM3)
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