IF (ENABLE_MQTT)
find_package(Qt5 ${QT_MIN_VERSION} NO_MODULE REQUIRED COMPONENTS
    Mqtt
)
IF (Qt5Mqtt_FOUND)
    MESSAGE (STATUS "Found MQTT")
    add_definitions (-DHAVE_MQTT)
ELSE ()
    MESSAGE (STATUS "MQTT Library not found.")
ENDIF ()
ELSE ()
    MESSAGE (STATUS "MQTT Library DISABLED.")
ENDIF ()