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NodeMcu (ESP8266) Tutorial A-02: Blinking internal LED - YouTube
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ESP8266 - Control an External LED Over Internet - Arduino Project Hub
ESP8266: How To Add More GPIO Pins (MCP23008 Driver) - YouTube
ESP8266 NodeMCU first WS2812 LED lights up green - Arduino Stack Exchange
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Turn off the second builtin Nodemcu 0.9 led - Arduino Stack Exchange
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ESP32 LED Blink Example | Circuits4you.com
ESP8266 NodeMcu Pinout - ESP8266 Shop
NodeMCU Basic Project-Blink a LED - Instructables
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Tweaking4All.com - Getting started with the ESP8266 as an Arduino replacement
