if(${IDF_VERSION_MAJOR} STREQUAL 6)
    set(requires esp_driver_gpio esp_driver_i2c esp_timer esp_event zh_vector)
else()
    set(requires driver esp_timer esp_event zh_vector)
endif()
idf_component_register(SRCS "zh_pcf8574.c" INCLUDE_DIRS "include" REQUIRES ${requires})