Onboard LEDs? NodeMCU's got two! – Low voltage. Mostly harmless...
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NodeMcu Installation Led Blink Blynk App - YouTube
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NodeMCU Lesson 4—Button Control LED « osoyoo.com
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Getting Started with NodeMCU ESP-12 using Arduino IDE: Blinking an LED | Circuit diagram, Arduino wireless, Electronics projects
NodeMCU Tutorial Series Part I: Arduino IDE and Blinking an LED — Maker Portal
How to Blink a LED with ESP8266 NodeMCU
NodeMCU Basic Project-Blink a LED - Instructables
Blink External LED Using NodeMCU ESP8266 - YouTube
How to program ESP8266 nodeMCU with Arduino IDE | LED Blink - Electric DIY Lab
