If you’re using an ESP8266-01 board, you can use the following GPIO diagram as a reference. For a comparison of these board, you can read this guide: ESP8266 Wi-Fi Development Boards comparison. The most widely used ESP8266 boards are the ESP-01, ESP8266-12E NodeMCU Kit, and the Wemos D1 Mini. If you’re just getting started with the ESP8266, we recommend reading our guide: Getting Started with the ESP8266.Īt the moment, there are a wide variety of development boards with the ESP8266 chip that differ in the number of accessible GPIOs, size, form factor, etc… Note: not all GPIOs are accessible in all development boards, but each specific GPIO works in the same way regardless of the development board you’re using. Use this diagram if you’re using an ESP8266 bare chip in your projects. The following figure illustrates the ESP8266 12-E chip pinout. We also have a guide for the ESP32 GPIOs: ESP32 Pinout Reference: Which GPIO pins should you use? ESP8266 12-E Chip Pinout With this guide, you’ll learn how to properly use the ESP8266 GPIOs and avoid hours of frustration by using the most suitable pins for your projects. Not all GPIOs are exposed in all ESP8266 development boards, some GPIOs are not recommended to use, and others have very specific functions. The ESP8266 12-E chip comes with 17 GPIO pins. This article is a guide for the ESP8266 GPIOs: pinout diagrams, their functions and how to use them.
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