def bml_display_current_settings(selected_components=None):
    #    Displays parameters for selected components.
    #    - Uses select_components() to choose components.
    #    - Prints each parameter with its value.
    #    - If a parameter value is missing or cannot be read, prints NaN.

    # 1 Get the selected component
    selection = select_components(selected_components)
    if selection is None:
        return  # user cancelled or invalid input

    # 2 Load the machine poarametrers JSON
    try:
        with open(BEAMLINE_PARAMETERS_FILE, "r") as f:
            machine_parameters = json.load(f, object_pairs_hook=OrderedDict)
    except:
        print("Error loading machine_parameters.json")
        return

    # 3 Loop through the components and display their parameters
    for comp in selection:
        print("\nComponent: " + comp)
        params = machine_parameters.get(comp, {})
        if not params:
            print("  No parameters found.")
            continue

        for key, param_info in params.items():

            # param_info enthalt z.B. den read_cmd
            read_cmd = param_info.get("read_cmd")  # JSON muss fur jeden Parameter den entsprechenden Befehl enthalten

            try:
                display_value = caget(read_cmd)
                print(key + " = " + str(display_value))
            except:
                display_value = "NaN"
            # print("  " + key + ": " + display_value)