Getting Started with ESP8266 WiFi Transceiver (Review) | Random Nerd Tutorials
ESP8266 Led is not working - Arduino Stack Exchange
Blink LED on ESP8266 | ezContents blog
GitHub - kiranshashiny/Wemos-D1-mini-Blink-LED: This is my first blog on WEMOS D1 mini, and what were the various parameters like board manager etc are listed here.
Getting Started with ESP8266 WiFi Transceiver (Review) | Random Nerd Tutorials
ESP201 gone wrong! - Everything ESP8266
NodeMCU Breathing LED with Arduino IDE – Arduining