@startuml Heparin

    participant TD                  as TD
    participant SW                  as SW
    participant UI                  as UI
    actor       USER                as US

    'Possible actions and interaction tuypes
    ' TD -> SW: MSG: Message
    ' SW -> TD: MSG: Message
    ' SW -> UI: CMD: command
    ' UI -> SW: ACT: Action
    ' US -> UI: User actions are:
    '   ENT: User enters a value or string
    '   TCH: User touches a button (RadioButton, CheckBox, ...)
    '   SET: User sets/slides a slider
    '   SCL: User scrolls a flipable area
    '
    'Messages conventions:
    '[x<hex message ID> <Req/Rsp/Dat>  \n  <P1>,<P..>]
    '[x<hex message ID> <Req/Rsp/Dat>  \n  <P1>,# certain amount of parameters according to the content]
    '[x<hex message ID> <Req/Rsp/Dat>  \n  <P1>,X The rest of the parameters do not matter.]

    == Heparin ==
    UI ->o UI: ⟲: Main Treatment Screen
    US -> UI: TCH: Heparin Menu Option
    UI -> US: ACT: Display Heparin Screen   \
                    \n\t  - Heparin Prescription    \
                    \n\t  - Heparin Delivery Data
    US -> UI: TCH: Press pause/ resume button
    UI -> SW: ACT: Heparin Request
    SW -> TD: MSG: [x8A: #1]            \
                \n\tRequest:            \
                \n\t(U32) requestedState
    TD -> SW: MSG: [x8B: #2]        \
                \n\tResponse:       \
                \n\t(U32)  mAccepted\
                \n\t(U32)  mReason  
    SW -> UI: ACT: Heparin Response
    UI -> US: ACT: Notify user
    == Heparin Data ==
    TD -> SW: MSG: [x8C: #3] \nTD Heparin Status Data\n(F32) mCumulative\n(F32) mTarget\n(U32) mTimeRemaining
    SW -> UI: CMD: Update Heparin Data\n(F32) mCumulative\n(F32) mTarget\n(U32) mTimeRemaining
    UI -> US: ACT: Display updated Values





@enduml