fatal error: functional: No such file or directory #include <functional>

Question

I installed the Arduino IDE and decided to create a project. Installed all libraries. But I do not understand why such an error. Help I want to connect ESP8266 to Arduino Uno. I need the arduino to send data over Wi-Fi to ThingSpeak In file included from C:\Users\Misha\Documents\Arduino\TestSketch\TestSketch.ino:4:0: c:\Users\Misha\Documents\Arduino\libraries\ESP8266WiFi\src/WiFiClient.h:24:10: fatal error: memory: No such file or directory #include ^~~~~~~~ compilation terminated.

exit status 1

Compilation error: exit status 1 There were attempts to reinstall, but in vain.

Answer 1

I solved this problem by wanting to call the libraries for ESP when it was necessary to refer to the module directly. And that call is possible only for the ESP board