could not convert from 'String' to 'std::__cxx11::string

[Bazmundi]

I dropped the Int64String code verbatim into the build enviroment for ESP32 under ESPHome.

Getting the following compile error when trying to use the code:

src/main.cpp: In lambda function:
src/main.cpp:250:25: error: could not convert 'int64String(int64_t, uint8_t, bool)(10, 1)' from 'String' to 'std::__cxx11::string {aka std::__cxx11::basic_string<char>}'
       return int64String(ESP.getEfuseMac(),10,true);

Any ideas how to fix this please?

[djGrrr]

@Bazmundi this appears to simply be that the return type of your function is not set correctly. int64String returns an Arduino String object: https://www.arduino.cc/reference/en/language/variables/data-types/stringobject/