ESP8266WiFi.h: No such file or directory

回答: 当出现"ESP8266WiFi.h: No such file or directory"的错误时，通常是由于缺少ESP8266WiFi库引起的。为了解决这个问题，你需要确保已经正确安装了ESP8266的开发板包。你可以在Arduino的开发板管理器中搜索并安装ESP8266的包，或者按照官方地址https://github.com/esp8266/Arduino的指引进行安装。\[1\]另外，你还需要在Arduino IDE中添加ESP8266官方开发板的网址，可以在红色方框中添加附件开发板，网址为https://arduino.esp8266.com/stable/package_esp8266com_index.json。\[2\]完成这些步骤后，重新编译你的代码，应该就能解决这个错误了。
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