@startuml Feature_Configuration
    participant FS                  as FS
    participant SW                  as SW
    participant UI                  as UI
    actor       USER                as US

    'Possible actions and interaction types
    ' External on CANBus
    ' TD -> SW: MSG: Message
    ' SW -> TD: MSG: Message

    ' Internal to the application
    ' XX -> YY: CMD: Command
    ' XX -> XX: ACT: Action

    ' External on OS/FS
    ' SW -> Script: ACT: Command
    ' Script -> OS: CMD: Command
    ' Script -> SW: MSG: Message
    ' OS -> Script: MSG: Message

    ' US -> UI: User actions are:
    '   ASK: Display a <message>
    '   ENT: User enters a value or string
    '   TCH: User touches a button (RadioButton, CheckBox, ...)
    '   SCL: User scrolls a flip-able area

    == Feature Configurations ==
    UI -> US: ACT: Device Settings Screen (Logged in with Service Password)
    US -> UI: TCH: Feature Configuration Option
    UI -> US: ACT: Feature Configuration Screen

    == Heparin Syringe Pump ==
    US -> UI: TCH: Touch Heparin Syringe Pump switch
    UI -> SW: ACT: Set Heparin Syringe Pump on or off
    SW -> FS: ACT: Write configuration in System.conf
    FS -> SW: ACT: Read configuration from System.conf
    SW -> UI: ACT: Notify UI
    UI -> UI: ACT: Update Sliding Switch
    UI -> US: ACT: Feature/ Defeature Heparin           \
                    \n\t - Prescription \
                    \n\t - Main Treament

    == Integrated BP Cuff ==
    US -> UI: TCH: Touch Integrated BP Cuff switch
    UI -> SW: ACT: Set Integrated BP Cuff on or off
    SW -> FS: ACT: Write configuration in System.conf
    FS -> SW: ACT: Read configuration from System.conf
    SW -> UI: ACT: Notify UI
    UI -> UI: ACT: Update Sliding Switch
    UI -> US: ACT: Feature/ Defeature BP Cuff           \
                    \n\t - Prescription \
                    \n\t - Main Treament

    == Chemical Disinfection ==
    US -> UI: TCH: Touch  Chemical Disinfection switch
    UI -> SW: ACT: Set  Chemical Disinfection on or off
    SW -> FS: ACT: Write configuration in System.conf
    FS -> SW: ACT: Read configuration from System.conf
    SW -> UI: ACT: Notify UI
    UI -> UI: ACT: Update Sliding Switch

@enduml