How to use Arduino IDE with ESP8266 SupportWhen you download and install Arduino IDE already.( Now is Arduino IDE version 1.6.5 )Link to download https://www.arduino.cc/en/Main/SoftwareThen Open Arduino IDE1. Go to menu File -> Preferences Copy This link http://arduino.esp8266.com/stable/package_esp8266com_index.json and paste to Additional Board Manager URLs Then OK2.Go to Menu Tools -> Board -> Boards Manager...You will see Boards [...]