ESP8266 SPIFFs | File System for NodeMCU | Microcontroller Tutorials
Getting Started with the NodeMCU (ESP8266 Based Development Board) - Electronics-Lab.com
Using an RFID module with an ESP8266 • AranaCorp
Amazon.com: HiLetgo 3pcs ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module Works Great for Arduino IDE/Micropython (Large) : Electronics
Introduction to the Internet of Things (IoT): ESP8266 architecture and Arduino GUI
NodeMCU ESP8266 Micropython Programming In 7 Simple Steps