ESP8266 pinout reference and how to use GPIO pins
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Blinking LEDs with Python: How to Code in Micro Python on the ESP8266/ NodeMCU — Steemit
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ESP8266 Thing Development Board Hookup Guide - SparkFun Learn
ESP8266 and Arduino IDE - blink example
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LED Blinking using ESP8266 - NodeMCU
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Tweaking4All.com - Getting started with the ESP8266 as an Arduino replacement
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Turn off the second builtin Nodemcu 0.9 led - Arduino Stack Exchange
Blink NodeMCU on-board LED using Arduino IDE with esp8266 library - YouTube
