You need to update to the latest ESP board files 2.0.0 by using Tools->Board->Boards-Manager. Select ESP8266 and press Update.
For information on installing libraries, see: http://arduino.cc/en/Guide/Libraries
You need to update to the latest ESP board files 2.0.0 by using Tools->Board->Boards-Manager. Select ESP8266 and press Update.
For information on installing libraries, see: http://arduino.cc/en/Guide/Libraries