KSMART is an abbreviation of Klati Smart which is a development project between Arduino and Android Studio. Like BoT or IoT project that develops remote electrical control.
Add the board url ESP8266, copy paste the url below, add to preferences Arduino.
https://arduino.esp8266.com/stable/package_esp8266com_index.json
Download KSmart and unzip in Arduino/libraries/KSmart. on sketch include libraries KSmart.