Convert Arduino file to C++ manually

Some Cloud & Desktop IDEs don’t support Arduino files (*.ino and .pde) because they are not valid C/C++ based source files:

Missing includes such as #include <Arduino.h>
Function declarations are omitted.

In this case, code completion and code linting do not work properly or are disabled. To avoid this issue you can manually convert your INO files to CPP.

For example, we have the next Demo.ino file:

void setup () {
    someFunction(13);
}

void loop() {
    delay(1000);
}

void someFunction(int num) {
}

Let’s convert it to Demo.cpp:

Add #include <Arduino.h> at the top of the source file
Declare each custom function (excluding built-in, such as setup and loop) before it will be called.

The final Demo.cpp:

#include <Arduino.h>

void someFunction(int num);

void setup () {
    someFunction(13);
}

void loop() {
    delay(1000);
}

void someFunction(int num) {
}

Finish.