NodeMCU ESP8266 Specifications, Overview and Setting Up
Amazon.com: KNACRO NodeMCU V3 Lua WiFi Module Integration of ESP8266 Memory 32Mb Flash, USB-Serial CH340G Compatible with ESP8266 32M Internet of Things Module : Electronics
GPIO pins of ESP8266 and How to use efficiently -IoTbyHVM
3Pcs ESP8266 1Cable NodeMCU CH340 ESP-12E WiFi Development Board for Arduino IDE – ASA College: Florida