The ESP8266 NodeMCU CP2102 board has ESP8266 which is a highly integrated chip designed for the needs of a new connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to offload all Wi-Fi networking functions from another application processor.

ESP8266 NodeMCU is a low-cost open source IoT platform. It initially included firmware which runs on the ESP8266 Wi-Fi SoC from Express if Systems, and hardware which was based on the ESP-12 module. Node MCU is an open source development board and firmware based in the widely used ESP8266 -12E Wi Fi module. It allows you to program the ESP8266 Wi Fi module with the simple and powerful LUA programming language or Arduino IDE. It combines features of WIFI access point and station + microcontroller.