ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
NodeMCU with 5V relay - #40 by mauro1388 - General Electronics - Arduino Forum
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
Arduino-er: Control GPIOs of NodeMCU (ESP8266) with ESP8266 core for Arduino, to read Buttons and write LEDs
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
Trying to get the example sketch for my ESP8266 NodeMCU working. >8hrs of trouble shooting and I cant figure out what Im doing wrong. Code in comments. : r/arduino
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