@startuml SystemInformationScreen

    participant TD                  as TD
    participant DD                  as DD
    participant SW                  as SW
    ' participant OS                  as OS
    ' participant Script              as Script
    participant UI                  as UI
    actor       USER                as US

    'Possible actions and interaction types
    ' TD -> SW: MSG: Message
    ' DD -> 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.]

    == System Information ==
    US -> UI: TCH: Device Settings, Information Button
    UI -> SW: MSG: [x0D: #5] F/W versions request\n(U08) UI major\n(U08) UI minor\n(U08) UI micro\n(U16) UI build\n(U32) UI Compatibility
    SW -> TD: MSG: [x0D: #5]
    SW -> DD: MSG: [x0D: #5]
    TD -> SW: MSG: [x0E: #5] TD f/w version response\n(U08) TD major\n(U08) UI minor\n(U08) UI micro\n(U16) UI build\n(U32) UI Compatibility 
    TD -> SW: MSG: [x??: #1] Water Configuration
    TD -> SW: MSG: [x??: #?] Service Dates\n(U32) Next Service Date\n(U32) Last Service Date
    DD -> SW: MSG: [x0F: #5] DD f/w version response\n(U08) UI major\n(U08) UI minor\n(U08) UI micro\n(U16) UI build\n(U32) UI Compatibility 
    SW -> UI: CMD: System Information Screen


@enduml