ESP8266 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 WiFi Board
Board: NodeMCU 1.0 (ESP-12E Module)
Flash Size: 4M (3M SPIFFS)
CPU Frequency: 80 Mhz
Upload Speed: 921600