How to fix PlatformIO WiFi.h: No Such File or Directory

Important note: On the ESP8266, this solution is not recommended. See How to fix PlatformIO ESP8266 WiFi.h: No Such File or Directory instead

Problem:

When compiling your PlatformIO firmware, you see an error message like

src/main.cpp:2:10: fatal error: WiFi.h: No such file or directory

**************************************************************
* Looking for WiFi.h dependency? Check our library registry!
*
* CLI  > platformio lib search "header:WiFi.h"
* Web  > https://platformio.org/lib/search?query=header:WiFi.h
*
**************************************************************

    2 | #include <WiFi.h>

Solution:

Add WiFi to the lib_deps in platformio.ini (create lib_deps if it is not present already):

lib_deps =
    WiFi

and then recompile.

Complete platformio.ini example:

[env:d1_mini_lite]
platform = espressif8266
board = d1_mini_lite
framework = arduino
monitor_speed = 115200
lib_deps =
    ESP Async [email protected]
    [email protected]
    WiFi