ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
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Reference — ESP8266 Arduino Core 2.4.0 documentation
ESP8266 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
![esp8266_gpio_pin_allocations [ESP8266 Support WIKI]](https://www.esp8266.com/wiki/lib/exe/fetch.php?media=pin_functions.png "esp8266_gpio_pin_allocations [ESP8266 Support WIKI]")
esp8266_gpio_pin_allocations [ESP8266 Support WIKI]
ESP8266 Pinout – IoT Bytes
Nodemcu Nodemcu Gpio With Arduino Ide | Nodemcu
ESP8266 Relay (active low): how to prevent triggering on boot or reset (SOLVED) - ESPHome - Home Assistant Community
ESP8266 – Knowing the NodeMCU GPIOs or Pinout - The Engineering Projects
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GPIO pins of ESP8266 and How to use efficiently -IoTbyHVM
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