已经定义，还是保持标识符未定义，且无法编译

PlatformIO IDE
1

bliker库中的
未定义标识符 “BLINKER_LOG”

(modaterator: chinese->english autotranslate): “Unknown identifier “BLINKER_LOG” in the blinker library error”.

2

You might have installed the wrong library. Your platformio.ini should contain

lib_deps = 2519

And for example code, see PlatformIO Registry. Unfortunately there seems to be a library with the same name (here)… If you have installed the wrong library you should delete the .pio\libdeps folder of you project and remove it from the global library repository.