Hello! I ran into the following problem In STM32cubeIDE, the sprintf function (str, "Привет"); calls encoding two characters instead of one Ascii Each even character = 208 (dec).

Because what you input to the compiler is a unicode 16 bit string which will be converted to ASCII 8 bit character table.

208 seems to be the cyrillic page for unicode characters, mandarin will be another.

The C standard leaves the choice of character set to be implementation-defined, i.e. it depends on the compiler, how it copes with the various character sets.

In gcc, you should be able to override the default (UTF-8) encoding using the -fexec-charset switch https://gcc.gnu.org/onlinedocs/cpp/Invocation.html#index-fexec-charset (it's a preprocessor switch). You might be able to use ASCII or some of the charsets listed here.

JW