@startuml Wifi

    participant TD                  as TD
    participant SW                  as SW
    participant UI                  as UI
    participant Script              as Script 
    participant Operating_System    as OS
    control     Wait_Retry          as Wait_Retry
    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
    ' UI -> UI: ACT: Action
    ' SW -> Script: ACT: Action
    ' Script -> OS: CMD: command
    ' Script -> SW: MSG: Message
    ' OS -> Script: MSG: Message

    ' US -> UI: User actions are:
    '   ENT: User enters a value or string
    '   TCH: User touches a button (RadioButton, CheckBox, ...)
    '   SCL: User scrolls a flipable area

    == Normal Bootup ==
    TD -> SW: MSG: [x12: 3,1] \n OpMode - Standby Dat
    SW -> UI: CMD: MainHome Screen
    UI ->o Wait_Retry: ⟲: MainHome Screen
    == Wi-Fi Settings Page ==
    US -> UI: TCH: Settings Menu
    UI -> UI: ACT: Device Settings Screen
    US -> UI: TCH: Wi-Fi Button
    UI -> UI: ACT: Wi-Fi Settings Screen
    UI -> SW: ACT: Request Wi-Fi Scan
    SW -> Script: ACT: wifi_scan.sh
    activate Script
    Script -> OS: CMD: Send 'nmcli' command to get wifi networks
    OS -> Script: MSG: Show list of Wi-Fi networks <SSID,BSSID,FREQ,RATE,\nSIGNAL,SECURITY,WPA-FLAGS,RSN-FLAGS,IN-USE>
    Script -> SW: MSG: Return list of available Wi-Fi networks <SSID,BSSID,\nFREQ,RATE,SIGNAL,SECURITY,WPA-FLAGS,RSN-FLAGS,IN-USE>
    deactivate Script
    SW -> UI: ACT: Display available networks and highlight connected network
    UI ->o Wait_Retry: ⟲: Wi-Fi Screen
        alt Wi-Fi Scan
        US -> UI: TCH: Scan Button
        UI -> SW: ACT: Request Wi-Fi Scan
        SW -> Script: ACT: wifi_scan.sh
        activate Script
        Script -> OS: CMD: Send 'nmcli' command to get wifi networks
        OS -> Script: MSG: Show list of Wi-Fi networks <SSID,BSSID,FREQ,RATE,\nSIGNAL,SECURITY,WPA-FLAGS,RSN-FLAGS,IN-USE>
        Script -> SW: MSG: Return list of available Wi-Fi networks <SSID,BSSID,\nFREQ,RATE,SIGNAL,SECURITY,WPA-FLAGS,RSN-FLAGS,IN-USE>
        deactivate Script
        SW -> UI: ACT: Display available networks and highlight connected network
        UI ->o Wait_Retry: ⟲: Wi-Fi Screen
        end
        alt Connect Wi-Fi
        US -> UI: SCL: Scroll through available networks
        US -> UI: TCH: Select desired network
        US -> UI: ENT: Enter password 
            alt Confirm
            US -> UI: TCH: Confirm Button
            UI -> SW: ACT: Connect Wi-Fi by SSID and password
            SW -> Script: ACT: wifi_connect.sh
            activate Script
            Script -> OS: CMD: Send 'nmcli' command with SSID and password
            OS -> Script: MSG: Result of Wi-Fi connect command
            deactivate Script
            UI -> UI: ACT: Wi-Fi Settings Screen
            UI -> SW: ACT: Request Wi-Fi Scan
            SW -> Script: ACT: wifi_scan.sh
            activate Script
            Script -> OS: CMD: Send 'nmcli' command to get wifi networks
            OS -> Script: MSG: Show list of Wi-Fi networks <SSID,BSSID,FREQ,RATE,\nSIGNAL,SECURITY,WPA-FLAGS,RSN-FLAGS,IN-USE>
            Script -> SW: MSG: Return list of available Wi-Fi networks <SSID,BSSID,\nFREQ,RATE,SIGNAL,SECURITY,WPA-FLAGS,RSN-FLAGS,IN-USE>
            deactivate Script
            SW -> UI: ACT: Display available networks and highlight connected network
            UI ->o Wait_Retry: ⟲: Wi-Fi Screen
                alt Connection Successful
                SW -> SW: ACT: Request connected Wi-Fi information
                SW -> Script: ACT: wifi_info.sh
                activate Script
                Script -> OS: CMD: 'nmcli commands to retrieve desired parameters'
                Script -> SW: MSG: Provide Wi-Fi info <SSID,IP,SUBNET_MASK,GATEWAY,DNS>
                deactivate Script
                SW -> UI: CMD: Update all UI fields <IP,Gateway,Subnet,DNS,SSID>
                UI ->o Wait_Retry: ⟲: Wi-Fi Screen
                end
            else Back
            US -> UI: TCH: Back Button
            UI ->o Wait_Retry: ⟲: Wi-Fi Screen
            end
        else Disconnect Wi-Fi
        US -> UI: TCH: Select connected network
            alt Confirm
            US -> UI: TCH: Confirm Button
            UI -> SW: ACT: Request disconnect Wi-Fi by SSID
            SW -> Script: ACT: wifi_disconnect.sh
            activate Script
            Script -> OS: CMD: 'nmcli' command to disconnect from Wi-Fi network by SSID
            OS -> Script: MSG: Result of Wi-Fi disconnect command
            deactivate Script
            SW -> UI: CMD: Clear all UI fields (IP, Gateway, Subnet, DNS, SSID)
            else Back
            US -> UI: TCH: Back Button
            UI ->o Wait_Retry: ⟲: Wi-Fi Screen
            end
        end
@enduml