NodeMCU Breathing LED with Arduino IDE – Arduining
Basics — Micropython on ESP8266 Workshop 1.0 documentation
Program ESP8266 with Arduino UNO and blink built-in ESP LED [Solved] - Project Guidance - Arduino Forum
ESP8266 NodeMCU – Blinking a LED
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.