When you buy the ESP module it will most likely have the factory AT or NodeMCU (LUA) firmware inside. To get the ESP Easy running, you need to replace the firmware with the ESP Easy firmware first.
This can be done with a special flash upload tool that uses the ESP serial interface. You can download the latest stable ESP Easy build from our website. This downloadable zipfile contains the flash tool, a command batchfile to launch the actual flash process and three versions of the binary firmware image.
> www.letscontrolit.com/wiki/index.php/Tutorial_ESPEasy_Firmware_Upload