Can't using all data type except "STRING" in <preferences.h>

Forum Rules

Before commenting read Forum rules

Don't comment the topic if you have a new question.

You can create a new topic selecting correct category from Gurux Forum and then create a new topic selecting "New Topic" from the top left.

By trialhudije , 4 March, 2022
Forums
Gurux.DLMS

Hello,
i including "preferences.h" library on esp32..

i got error when i compile this code:

" preferences.begin("my-app", false);
unsigned int counter = preferences.getUInt("counter", 0);
preferences.putUInt("counter", counter);
preferences.end(); "

but success if i change to:
String counter = preferences.getString("counter", "0");
preferences.putString("counter", "0");

could you give me solution?

thanks
Tri Alhudi