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.
Latest ESP8266 LOLIN by WeMos D1 Mini V4, Pro, Lite, ESP32, Clones & Shields | eBay
LOLIN D1 mini v3.1.0 — WEMOS documentation
Wemos D1 Mini Setup | Average Maker
Getting started with WeMos D1 mini and WeMos D1 mini PRO
LOLIN D1 mini — WEMOS documentation
MAX7219 Not Lighting Up With Wemos D1 Mini Lite ESP8285 - Project Guidance - Arduino Forum