Onboard LEDs? NodeMCU's got two! – Low voltage. Mostly harmless...
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NodeMCU Basic Project-Blink a LED - Instructables
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Onboard LEDs? NodeMCU's got two! – Low voltage. Mostly harmless...
Introduction to the Internet of Things (IoT): ESP8266 architecture and Arduino GUI
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Tweaking4All.com - Getting started with the ESP8266 as an Arduino replacement
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How to Blink a LED with ESP8266 NodeMCU
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NodeMcu (ESP8266) Tutorial A-02: Blinking internal LED - YouTube
![Program ESP8266 with Arduino UNO and blink built-in ESP LED [Solved] - Project Guidance - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/2/8/7/287ee9a33bf323cc3c3e164c7754daa72904f9d7.jpeg "Program ESP8266 with Arduino UNO and blink built-in ESP LED [Solved] - Project Guidance - Arduino Forum")
Program ESP8266 with Arduino UNO and blink built-in ESP LED [Solved] - Project Guidance - Arduino Forum
Basic ESP8266 NodeMCU tutorial: Breadboard, Pinout and Dimmable LED with Pulse-Width Modulation (PWM) - Mechatronics Blog
