ESP32读写IO点灯程序

最新推荐文章于 2025-09-27 14:47:04 发布

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最新推荐文章于 2025-09-27 14:47:04 发布 · 1.2k 阅读

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#单片机

本文记录了作者使用ESP32开发板进行点灯实验的过程，通过通用IO口实现数字读写控制LED灯。在实验中，通过断开和连接23针来控制LED的亮灭，并通过Arduino代码实现串口监视器显示高低电平切换。实验提出疑问，探讨了开发板可用的通用IO口、引脚的初始电平以及为何5V作为高电平输入时，接3V3引脚可能导致灯不亮的问题。

2021年6月28日，第一次尝试，利用ESP32开发板点灯，通用IO口，数字读写。

1）原理图

2）Arduino 代码

/*
  Switch_Led
  
  基于Blink程序修改

  Turns an LED on for one second, then off for one second, repeatedly.

  Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
  it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
  the correct LED pin independent of which board is used.
  If you want to know what pin the on-board LED is connected to on your Arduino
  model, check the Technical Specs of your board at:
  https://www.arduino.cc/en/Main/Products

  modified 2021 6 28
  by Scott Fitzgerald
  modified 2 Sep 2016
  by Arturo Guadalupi
  modified 8 Sep 2016
  by Colby Newman
  modified 28 Jun 2021
  by Seaca QFQ

  利用按键引脚GPIO23控制
  利用LED引脚GPIO22执行
  
  
  This example code is in the public domain.

  http://www.arduino.cc/en/Tutori