@startuml Vitals
    participant TD                  as TD
    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

    == Vitals (Automatic) ==
    loop QTimerEvent
        SW ->o SW: ⟲: ACT: Blood Pressure Measurement Interval Timeout
    end
    SW -> UI: ACT: Notify UI timer interval timeout
    UI -> SW: ACT: Request Vitals
    SW -> TD: MSG: [x63: #0] Request Vitals
    TD -> SW: MSG: [x64: #2]        \
                \n\tResponse:       \
                \n\t(U32)  mAccepted\
                \n\t(U32)  mReason  
    SW -> UI: ACT: Vitals Response

    alt Accepted
    group Vitals_Data
        UI --> UI: ...
    end
    UI -> UI: ACT: Populate all UI fields with Vitals Data
    UI -> US: ACT: Display updated Vitals Data                      \
                    \n\t Display last read measurement date/time    \
                    \n\t Animiate vitals heart icon
    else #Pink Rejected
        UI -> US: ACT: Prompt vitals popup                          \
                        \n\t Notify User displaying rejection reason  
        group Vitals (Popup)
            UI --> UI: ...
        end
    end
    UI -> SW: ACT: Confirm Vitals from integrated blood pressure cuff
    SW -> SW: ACT: Log Vitals               \
               \n\tRestart Timer

    == Vitals (Popup) ==
        US -> UI: TCH: Press Vitals Headerbar icon button\tor                                     \
                \nACT: Failed check for integrated blood pressure cuff
    group Manual
        US -> UI: ENT: Enter Vitals data    \
                        \n\t-Systolic       \
                        \n\t-Diastolic      \
                        \n\t-HeartRate    
        US -> UI: TCH: Press Confirm
    end
    group Automatic
        US -> UI: TCH: Press Measure Vitals
        group Vitals (Automatic)
            UI --> UI: ...
            alt Accepted
                UI -> UI: ACT: Close Popup
            else #Pink Rejected
                UI -> US: ACT: Notify User displaying rejection reason  
            end
        end
    end

    !include common_puml/Vitals_Data.puml
@enduml