Storing data in flash memory

Assuming you are using the META, by adding const to your variable definitions you put them into flash.

This string is in RAM:

char mystring[] = "Hello World";

while this string is in flash:

const char mystring[] = "Hello World";

You can access both the exact same way

Thanks, helpful as always ;). But now I encounter other problem. I want to store my stage data in object of Room class. Sadly I can't make it const cause im adding things to it on setup by using methods. So how can I store my stage data in flash ?

I can make all stage objects and then store it in constant array but still there are non-constant created objects that still gonna be in RAM not in flash :C

Via brace initializers (you can't run a custom constructor then, though)

const MyObj test = {42, 1337};

the parameters are the attributes in the order they appear

Is a difference with PROGMEM ?

PROGMEM isn't relevant for the META, as it only has one addressible space. Both the PROGMEM keyword and the F() macro literally do nothing when compiling for the META

Okay, I got it :D. Thanks for help ^^