Datasheet

Download Arduino IDE from Arduino.cc (1.6.8 or greater) from Arduino.cc
The latest is usually the best
Install the ESP8266 Board Package
Enter http://arduino.esp8266.com/stable/package_esp8266com_index.json into
Additional Board Manager URLs
field in the
Arduino v1.6.4+ preferences.
Visit our guide for how to add new boards to the Arduino 1.6.4+ IDE for more info about adding third party boards.
Next, use the Board manager to install the ESP8266 package.
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