### Start Socket Server Thread

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Starts the socket server thread. It retrieves configuration settings for the socket mode, host, and port to establish the server connection.

```python
def sockserver_start(self, ntriprtcmstr: str = RTCMSTR):
        """
        Start socket server thread.

        :param str ntriprtcmstr: source table string indicating RTCM3 types and intervals
        """

        cfg = self.configuration
        ntripmode = cfg.get("sockmode_b")
        host = cfg.get("sockhost_s")
        if ntripmode:  # NTRIP CASTER
            port = cfg.get("sockportntrip_n")
```

--------------------------------

### Setup RoverFrame Widgets

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/rover_frame.html

Configures the grid layout and creates the CanvasCompass widget for the RoverFrame.

```python
def _body(self):
        """Set up frame and widgets."""

        self.grid_columnconfigure(0, weight=1)
        self.grid_rowconfigure(0, weight=1)
        self._canvas = CanvasCompass(
            self.__app, self, MODE_POL, width=self.width, height=self.height, bg=BGCOL
        )
        self._canvas.grid(column=0, row=0, sticky=NSEW)
```

--------------------------------

### Setup Frame and Widgets

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/levelsview_frame.html

Configures the grid layout for the frame and creates the CanvasGraph widget, which serves as the drawing surface for the C/No data.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        self.grid_columnconfigure(0, weight=1)
        self.grid_rowconfigure(0, weight=1)
        self._canvas = CanvasGraph(
            self.__app, self, width=self.width, height=self.height, bg=BGCOL
        )
        self._canvas.grid(column=0, row=0, sticky=NSEW)
```

--------------------------------

### IMUFrame Body Setup

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/imu_frame.html

Configures the grid layout for the IMUFrame and initializes its child widgets, including the canvas, labels, and spinboxes for range and option selection.

```python
def _body(self):
        """Set up frame and widgets."""

        for i in range(4):
            self.grid_columnconfigure(i, weight=1, uniform="ent")
        self.grid_rowconfigure(0, weight=1)
        self.grid_rowconfigure(1, weight=0)
        self.grid_rowconfigure(2, weight=0)
        self._canvas = Canvas(self, width=self.width, height=self.height, bg=BGCOL)
        self._lbl_range = Label(self, text="Range", fg=FGCOL, bg=BGCOL, anchor=W)
        self._spn_range = Spinbox(
            self, 
            values=RANGES,
            width=8,
            wrap=True,
            fg=PNTCOL,
            bg=BGCOL,
            readonlybackground=BGCOL,
            buttonbackground=BGCOL,
            textvariable=self._range,
            state=READONLY,
        )
        self._lbl_option = Label(self, text="Option", fg=FGCOL, bg=BGCOL, anchor=W)
        self._spn_option = Spinbox(
            self,
            values=OPTIONS,
            width=8,
            wrap=True,
            fg=PNTCOL,
            bg=BGCOL,
            readonlybackground=BGCOL,
            buttonbackground=BGCOL,
            textvariable=self._option,
            state=READONLY,
        )
        self._canvas.grid(column=0, row=0, columnspan=4, sticky=NSEW)

        self._lbl_range.grid(column=0, row=1, sticky=EW)
        self._spn_range.grid(column=1, row=1, sticky=EW)
        self._lbl_option.grid(column=2, row=1, sticky=EW)
        self._spn_option.grid(column=3, row=1, sticky=EW)
```

--------------------------------

### get

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/configuration.html

Retrieves the value of an individual configuration setting. Raises a KeyError if the setting name is not found.

```APIDOC
## get

### Description
Get individual value.

### Method
```python
def get(self, name: str) -> Any:
```

### Parameters
* `name` (str): The name of the setting to retrieve.

### Returns
* `Any`: The value of the specified setting.

### Raises
* `KeyError`: If the provided `name` does not exist in the configuration settings.
```

--------------------------------

### Widget Setup and Management

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Instantiates or destroys a widget based on its state. If the widget should be visible and does not exist, it's created; if it should be hidden and exists, it's destroyed.

```python
frm = state[FRAME]
visible = state[VISIBLE]
w = getattr(self, frm, None)
if visible and w is None:
    setattr(
        self, 
        frm,
        state[CLASS](self, self.frm_widgets, borderwidth=1, relief="groove"),
    )
elif not visible and w is not None:
    w.grid_forget()
    w.destroy()
    w = None
    setattr(self, frm, None)
return getattr(self, frm, None)
```

--------------------------------

### StatusFrame Widget Setup

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/status_frame.html

Sets up the individual Label widgets that will be used to display connection, device, and status information within the status bar frame.

```python
def _body(self):
    """
    Set up frame and widgets.
    """

    self.lbl_connection = Label(self, anchor=W, bg=BGCOL)
    self.lbl_device = Label(self, anchor=W, bg=BGCOL)
    self.lbl_status = Label(self, anchor=W, bg=BGCOL)
```

--------------------------------

### MapviewFrame Widget Setup

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/map_frame.html

Configures the widgets within the MapviewFrame, including the map canvas and option controls.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        self._canvas = CanvasMap(
            self.__app,
            self,
            height=self.height,
            width=self.width,
            bg=BGCOL,
        )
        self._frm_options = Frame(self, bg=BGCOL)
        self._spn_maptype = Spinbox(
            self._frm_options,
            values=MAPTYPES,
            width=7,
            wrap=True,
            textvariable=self._maptype,
            state=READONLY,
            background=BGCOL,
            readonlybackground=BGCOL,
            foreground=PNTCOL,
            buttonbackground=BGCOL,
        )
        self._lbl_zoom = Label(
            self._frm_options, width=5, text="Zoom", bg=BGCOL, fg=PNTCOL
        )
        self._spn_zoom = Spinbox(
            self._frm_options,
            from_=MIN_ZOOM,
            to=MAX_ZOOM,
            width=4,
            wrap=False,
            textvariable=self._mapzoom,
            state=READONLY,
            background=BGCOL,
            readonlybackground=BGCOL,
            disabledbackground=BGCOL,
            disabledforeground="grey",
            foreground=PNTCOL,
            buttonbackground=BGCOL,
        )
        self._chk_showtrack = Checkbutton(
            self._frm_options,
            text=LBLSHOWTRACK,
            variable=self._showtrack,
            background=BGCOL,
            foreground=PNTCOL,
        )
```

--------------------------------

### SocketConfigFrame Widget Body Setup

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/socketconfig_frame.html

Sets up the basic Tkinter widgets for server, port, protocol, TLS, and self-sign options within the frame.

```python
def _body(self):
        """
        Set up widgets.
        """

        self._frm_basic = Frame(self)
        self._lbl_server = Label(self._frm_basic, text="Server")
        self.ent_server = Entry(
            self._frm_basic,
            textvariable=self.server,
            relief="sunken",
            width=32,
        )

        self._lbl_port = Label(self._frm_basic, text="Port")
        self.ent_port = Entry(
            self._frm_basic,
            textvariable=self.port,
            relief="sunken",
            width=6,
        )
        self._lbl_protocol = Label(self._frm_basic, text="Protocol")
        self._spn_protocol = Spinbox(
            self._frm_basic,
            textvariable=self.protocol,
            values=self._protocol_range,
            width=12,
            state=READONLY,
            wrap=True,
        )
        self._chk_https = Checkbutton(self._frm_basic, variable=self.https, text="TLS")
        self._chk_selfsign = Checkbutton(
            self._frm_basic, variable=self.selfsign, text="Self Sign"
        )
```

--------------------------------

### Start Socket Server Thread

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Initiates a new thread to run the socket server. Configuration parameters are passed to the thread target function.

```python
self._socket_thread = Thread(
            target=self._sockserver_thread,
            args=(
                ntripmode,
                host,
                port,
                https,
                tlspempath,
                ntriprtcmstr,
                ntripuser,
                ntrippassword,
                SOCKSERVER_MAX_CLIENTS,
                self.socket_outqueue,
            ),
            daemon=True,
        )
        self._socket_thread.start()
        self.server_status = 0  # 0 = active, no clients
```

--------------------------------

### Get MQTT Subscription Topics

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/spartn_json_config.html

Returns a dictionary containing the MQTT subscription topics for Key, AssistNow, and Data, as configured in the SPARTN JSON.

```python
    @property
    def topics(self) -> list:
        """
        Getter for topics.

        :return: list of topics
        :rtype: list
        """

        return self._topics

```

--------------------------------

### Get Connection Status Integer

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Provides a getter for the integer representation of the connection status. For example, 1 typically indicates a connected state.

```python
@property
    def conn_status(self) -> int:
        """
        Getter for connection status.

        :return: connection status e.g. 1 = CONNECTED
        :rtype: int
        """

        return self._conn_status
```

--------------------------------

### Initialize Connection Buttons

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/settings_child_frame.html

Sets up buttons for connecting via socket, file, and disconnecting, along with their associated labels and commands.

```Python
self._btn_connect_socket = Button(
            self._frm_buttons,
            width=45,
            height=35,
            image=self._img_socket,
            command=lambda: self._on_connect(CONNECTED_SOCKET),
            state=NORMAL,
        )
        self._lbl_connect_socket = Label(self._frm_buttons, text="TCP/UDP")
        self._btn_connect_file = Button(
            self._frm_buttons,
            width=45,
            height=35,
            image=self._img_dataread,
            command=lambda: self._on_connect(CONNECTED_FILE),
            state=NORMAL,
        )
        self._lbl_connect_file = Label(self._frm_buttons, text="FILE")
        self._btn_disconnect = Button(
            self._frm_buttons,
            width=45,
            height=35,
            image=self._img_disconn,
            command=lambda: self._on_connect(DISCONNECTED),
            state=DISABLED,
        )
        self._lbl_disconnect = Label(self._frm_buttons, text="STOP")
        self._btn_exit = Button(
            self._frm_buttons,
            width=45,
            height=35,
            image=self._img_exit,
            command=lambda: self.__app.on_exit(),
            state=NORMAL,
        )
```

--------------------------------

### Get Next SPARTN Key Details

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/spartn_json_config.html

Returns a tuple containing the next SPARTN key, its start datetime, and its end datetime, based on the dynamic key configuration in the JSON.

```python
    @property
    def next_key(self) -> tuple:
        """
        Getter for next key.

        :return: tuple of (key, start date, end date)
        :rtype: tuple
        """

        return (self._next_key, self._next_start, self._next_end)

```

--------------------------------

### Initialize Hardware Info Frame

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/hardware_info_frame.html

Initializes the Hardware_Info_Frame, setting up references to the application and parent frame, loading necessary icons, and preparing the widget layout.

```python
class Hardware_Info_Frame(Frame):
    """
    Hardware & firmware information panel.
    """



    def __init__(self, app: Frame, parent: Frame, *args, **kwargs):
        """
        Constructor.

        :param Frame app: reference to main tkinter application
        :param Frame parent: reference to parent frame (config-dialog)
        :param args: optional args to pass to Frame parent class
        :param kwargs: optional kwargs to pass to Frame parent class
        """

        self.__app = app  # Reference to main application class
        self.__container = parent
        self._protocol = kwargs.pop("protocol", "UBX")

        super().__init__(parent.container, *args, **kwargs)

        self._img_send = ImageTk.PhotoImage(Image.open(ICON_SEND))
        self._img_pending = ImageTk.PhotoImage(Image.open(ICON_PENDING))
        self._img_confirmed = ImageTk.PhotoImage(Image.open(ICON_CONFIRMED))
        self._img_warn = ImageTk.PhotoImage(Image.open(ICON_WARNING))

        self._body()
        self._do_layout()
        self.reset()
        self._attach_events()
```

--------------------------------

### Set up Settings Widgets

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/settings_frame.html

Initializes the main settings child frame and references its sub-frames for serial and socket client settings.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        self.frm_settings = SettingsChildFrame(self.__app, self._frm_container)
        self.frm_serial = self.frm_settings.frm_serial
        self.frm_socketclient = self.frm_settings.frm_socketclient
```

--------------------------------

### Get Current SPARTN Key Details

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/spartn_json_config.html

Returns a tuple containing the current SPARTN key, its start datetime, and its end datetime, derived from the dynamic key configuration in the JSON.

```python
    @property
    def current_key(self) -> tuple:
        """
        Getter for current key.

        :return: tuple of (key, start date, end date)
        :rtype: tuple
        """

        return (self._curr_key, self._curr_start, self._curr_end)

```

--------------------------------

### Check for Homebrew Python Installation

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/helpers.html

Verifies if Python 3 is installed via Homebrew by checking for the existence of the default Homebrew Python 3 executable. This is useful for identifying installations that might cause issues with subprocesses.

```python
def brew_installed() -> bool:
    """
    Check if Python installed under Homebrew.

    Some Python/tkinter installations under Homebrew cause
    a critical segmentation error when shell subprocesses
    are invoked.

    :return: yes/no
    :rtype: bool
    """

    return path.isfile("/opt/homebrew/bin/python3")
```

--------------------------------

### Setup Widgets for Hardware Info Frame

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/hardware_info_frame.html

Defines and initializes the labels used to display hardware, software, firmware, and protocol version information within the frame.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        self._lbl_hwverl = Label(self, text="Hardware")
        self._lbl_hwver = Label(self, anchor=W)
        self._lbl_swverl = Label(self, text="Software")
        self._lbl_swver = Label(self, anchor=W)
        self._lbl_fwverl = Label(self, text="Firmware")
        self._lbl_fwver = Label(self, anchor=W)
        self._lbl_romverl = Label(self, text="Protocol")
        self._lbl_romver = Label(self, anchor=W)
        self._lbl_gnssl = Label(self, text="GNSS/AS")
        self._lbl_gnss = Label(self, anchor=W)
```

--------------------------------

### Set up UBX_RATE_Frame Widgets

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/ubx_solrate_frame.html

Sets up the labels, spinboxes, and buttons within the UBX_RATE_Frame for user interaction and configuration.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        self._lbl_cfg_rate = Label(self, text=LBLCFGRATE, anchor=W)
        self._lbl_ubx_measint = Label(self, text="Solution Interval (ms)")
        self._spn_ubx_measint = Spinbox(
            self,
            values=(25, 50, 100, 200, 250, 500, 1000, 2000, 5000, 10000),
            width=6,
            state=READONLY,
            wrap=True,
            textvariable=self._measint,
        )
        self._lbl_ubx_navrate = Label(self, text="Measurement Ratio")
        self._spn_ubx_navrate = Spinbox(
            self,
            from_=1,
            to=127,
            width=4,
            state=READONLY,
            wrap=True,
            textvariable=self._navrate,
        )
        self._lbl_ubx_timeref = Label(self, text="Time Reference")
        self._spn_ubx_timeref = Spinbox(
            self,
            values=list(TIMEREFS.values()),
            width=5,
            state=READONLY,
            wrap=True,
            textvariable=self._timeref,
        )
        self._lbl_send_command = Label(self, image=self.__container.img_none)
        self._btn_send_command = Button(
            self,
            image=self.__container.img_send,
            width=50,
            command=self._on_send_rate,
            font=self.__app.font_md,
        )
```

--------------------------------

### Get Range of Value

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/helpers.html

This function is intended to get the range of a value, but its implementation is incomplete in the provided source.

```python
def get_range(val: float, rng: tuple):
    """

```

--------------------------------

### Initialize QGCHandler

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/qgc_handler.html

Initializes the QGCHandler with a reference to the main application. It sets up internal references and logging.

```python
def __init__(self, app):
        """
        Constructor.

        :param Frame app: reference to main tkinter application
        """

        self.__app = app  # Reference to main application class
        self.__master = self.__app.appmaster  # Reference to root class (Tk)
        self.logger = logging.getLogger(__name__)

        self._raw_data = None
        self._parsed_data = None
```

--------------------------------

### NTRIPConfigDialog Widget Setup

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/ntrip_client_dialog.html

Sets up the main frame and widgets for the NTRIP configuration dialog. This includes creating frames for socket configuration, labels and entry fields for mount point, and listboxes with scrollbars for the source table.

```python
def _body(self):
        """
        Set up frame and widgets.
        """
        # pylint: disable=unnecessary-lambda

        self._frm_body = Frame(self)
        self._frm_socket = SocketConfigNtripFrame(
            self.__app,
            self._frm_body,
            protocols=[TCPIPV4, TCPIPV6],
            server_callback=self._on_server,
        )
        self._lbl_mountpoint = Label(self._frm_body, text=LBLNTRIPMOUNT)
        self._ent_mountpoint = Entry(
            self._frm_body,
            textvariable=self._ntrip_mountpoint,
            state=NORMAL,
            relief="sunken",
            width=12,
        )

        self._lbl_mpdist = Label(
            self._frm_body,
            width=30,
            anchor=W,
        )
        self._lbl_sourcetable = Label(self._frm_body, text=LBLNTRIPSTR)
        self._lbx_sourcetable = Listbox(
            self._frm_body,
            height=4,
            relief="sunken",
            width=40,
        )
        self._scr_sourcetablev = Scrollbar(self._frm_body, orient=VERTICAL)
        self._scr_sourcetableh = Scrollbar(self._frm_body, orient=HORIZONTAL)
        self._lbx_sourcetable.config(yscrollcommand=self._scr_sourcetablev.set)
        self._lbx_sourcetable.config(xscrollcommand=self._scr_sourcetableh.set)

```

--------------------------------

### Get Message Mode

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/serialconfig_frame.html

Returns the current message parsing mode. The mode is determined by comparing the internal state with predefined constants for SET, POLL, SETPOLL, and GET.

```python
if self._msgmode_name.get() == MSGMODED[SET]:
            return SET
        if self._msgmode_name.get() == MSGMODED[POLL]:
            return POLL
        if self._msgmode_name.get() == MSGMODED[SETPOLL]:
            return SETPOLL
        return GET
```

--------------------------------

### Load Settings from CLI/Environment

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/configuration.html

Loads configuration settings from command-line arguments or environment variables. It checks for various parameters like user port, API keys, and MQTT settings.

```python
def loadcli(self, **kwargs):
        """
        Load settings from CLI keyword arguments or environment variables.

        :param dict kwargs: CLI keyword arguments
        """

        arg = kwargs.pop("userport", getenv("PYGPSCLIENT_USERPORT", None))
        if arg is not None:
            self.set("userport_s", arg)
        arg = kwargs.pop("spartnport", getenv("PYGPSCLIENT_SPARTNPORT", None))
        if arg is not None:
            self.set("spartnport_s", arg)
        arg = kwargs.pop("mqapikey", getenv("MQAPIKEY", None))
        if arg is not None:
            self.set("mqapikey_s", arg)
        arg = kwargs.pop("mqttclientid", getenv("MQTTCLIENTID", None))
        if arg is not None:
            self.set("mqttclientid_s", arg)
        arg = kwargs.pop("spartnkey", getenv("MQTTKEY", None))
        if arg is not None:
            self.set("spartnkey_s", arg)
        arg = kwargs.pop("spartnbasedate", getenv("SPARTNBASEDATE", None))
        if arg is not None:
            self.set("spartnbasedate_n", int(arg))
        arg = kwargs.pop("mqttclientregion", getenv("MQTTCLIENTREGION", None))
        if arg is not None:
            self.set("mqttclientregion_s", arg)
        arg = kwargs.pop("mqttclientmode", getenv("MQTTCLIENTMODE", None))
        if arg is not None:
            self.set("mqttclientmode_n", int(arg))
        arg = kwargs.pop("ntripcasteruser", getenv("NTRIPCASTER_USER", None))
        if arg is not None:
            self.set("ntripcasteruser_s", arg)
        arg = kwargs.pop("ntripcasterpassword", getenv("NTRIPCASTER_PASSWORD", None))
        if arg is not None:
            self.set("ntripcasterpassword_s", arg)
        arg = kwargs.pop("tlspempath", getenv(PYGNSSUTILS_PEMPATH, PYGNSSUTILS_PEM))
        if arg is not None:
            self.set("tlspempath_s", arg)
        arg = kwargs.pop("tlscrtpath", getenv(PYGNSSUTILS_CRTPATH, PYGNSSUTILS_CRT))
        if arg is not None:
            self.set("tlscrtpath_s", arg)
```

--------------------------------

### Start Stream Read Thread

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/stream_handler.html

Starts the background thread responsible for reading data from the configured stream. Clears the stop event and creates a new thread targeting the _read_thread method.

```python
def start(self, caller: Frame, settings: dict):
        """
        Start the stream read thread.

        :param Frame caller: calling Frame
        :param dict settings: settings dictionary
        """

        self._stopevent.clear()
        self._stream_thread = Thread(
            target=self._read_thread,
            args=(
                self.__master,
                self._stopevent,
                settings,
                caller.status_label,  # for status update messages
            ),
            daemon=True,
        )
        self._stream_thread.start()
```

--------------------------------

### Handle Socket Server Action

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/serverconfig_dialog.html

Handles the action when the socket server is started or stopped. It first validates the settings and then determines the appropriate Ntrip RTCM message string based on the receiver type before starting the socket server.

```python
def _on_socketserve(self, var, index, mode):
        """
        Action when socket server is started or stopped.
        """
        # pylint: disable=line-too-long

        if self.valid_settings():
            self.status_label = ("", INFOCOL)
        else:
            self.status_label = ("ERROR - invalid entry", ERRCOL)
            return

        # different receiver models support different RTCM3 output message cohorts
        if self.receiver_type.get() in (UBLOX_ZEDF9, UBLOX_ZEDX20):
            ntriprtcmstr = (
                "1002(5),1006(5),1010(5),1077(1),1087(1),1097(1),1127(1),1230(1)"
            )
        elif self.receiver_type.get() == UNICORE_UM980:
            ntriprtcmstr = "1002(10),1006(10),1012(10),1019(10),1020(10),1033(10),1074(1),1084(1),1094(1),1124(1)"
        elif self.receiver_type.get() == QUECTEL_LCSERIES:
            ntriprtcmstr = "1005(10),1012(10),1019(10),1020(10),1033(10),1042(10),1046(10),1077(1),1087(1),1097(1),1127(1)"
        elif self.receiver_type.get() == QUECTEL_LGSERIES:
            ntriprtcmstr = "1005(10),1012(10),1019(10),1020(10),1033(10),1077(1),1087(1),1097(1),1127(1),1137(1)"
        elif self.receiver_type.get() == SEPTENTRIO_MOSAIC:
            ntriprtcmstr = "1006(5),1013(5),1019(5),1020(5),1033(5),1077(1),1087(1),1097(1),1127(1),1230(1)"
        else:
            ntriprtcmstr = RTCMSTR
        if self._socket_serve.get():
            # start server
            self.__app.sockserver_start(ntriprtcmstr)
```

--------------------------------

### Initialize Device Communication Protocols

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Serializes and prepares messages for different communication protocols (UBX, SBF, NMEA) before sending them to the device. Includes a delay for connection stabilization and intervals between commands.

```python
self.device_label = NA
        msgs = []
        if protocol & UBX_PROTOCOL:
            msgs.append(UBXMessage("MON", "MON-VER", POLL).serialize())
        if protocol & SBF_PROTOCOL:
            msgs.append(b"SSSSSSSSSS\r\n")
            msgs.append(b"exeSBFOnce, COM1, ReceiverSetup\r\n")
        if protocol & UNI_PROTOCOL:
            msgs.append(b"VERSIONB\r\n")
        if protocol & NMEA_PROTOCOL:
            msgs.append(NMEAMessage("P", "QTMVERNO", POLL).serialize())

        # pause for n seconds before sending first command to allow connection to stabilise
        # allow a small interval between individual commands to allow receiver time to process
        self.send_to_device(
            msgs,
            pause=CMDINITDELAY,
            interval=self.configuration.get("ttydelay_b") * CMDPAUSE,
        )
```

--------------------------------

### Application Update Logic

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Updates outdated application packages to the latest versions. It checks for updates and uses 'pipx upgrade' or 'pip install --upgrade' based on the installation method. Note that some platforms may block subprocess calls.

```python
    def do_app_update(self, *args, **kwargs) -> int:  # pylint: disable=unused-argument
        """
        Update outdated application packages to latest versions.

        NB: Some platforms (e.g. Homebrew-installed Python environments)
        may block Python subprocess calls ('run') on security grounds.

        :return: return code 0 = error, 1 = OK
        :rtype: int
        """

        if brew_installed():
            self.status_label = (BREWUPDATE, INFOCOL)
            return 0

        self.status_label = (UPDATEINPROG, INFOCOL)
        updates = [
            nam for (nam, current, latest) in check_for_updates() if latest != current
        ]
        if len(updates) < 1:
            return 1

        pth = path.dirname(path.abspath(getfile(currentframe())))
        if "pipx" in pth:  # installed into venv using pipx
            cmd = [
                "pipx",
                "upgrade",
                "pygpsclient",
            ]
        else:  # installed using pip
            cmd = [
                executable,  # i.e. python3 or python
                "-m",
                "pip",
                "install",
                "--upgrade",
            ]
            for name in updates:
                cmd.append(name)

        result = None
        try:
            self.logger.debug(f"{executable=} {pth=} {cmd=}")
            result = run(cmd, check=True, capture_output=True)
            self.status_label = (UPDATERESTART, OKCOL)
            self.logger.debug(result.stdout)
            return 1
        except CalledProcessError as err:
```

--------------------------------

### ChartviewFrame Widget Body Setup

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/chart_frame.html

Sets up the main frame and its widgets, including the canvas for graph display and labels for channel identity, name, scale, min/max Y values, time range, and max points. It configures grid layout for widgets.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        srange, yrange = gen_yrange()
        # set column and row expand behaviour
        for i in range(6):
            self.grid_columnconfigure(i, weight=1, uniform="ent")
        self.grid_rowconfigure(0, weight=1)
        for i in range(1, 2 + self._num_chans):
            self.grid_rowconfigure(i, weight=0)
        self._canvas = CanvasGraph(
            self.__app, self, width=self.width, height=self.height, bg=BGCOL
        )
        self._lbl_id = Label(
            self,
            text="Identity",
            fg=LBLCOL,
            bg=BGCOL,
        )
        self._lbl_name = Label(
            self,
            text="Name",
            fg=LBLCOL,
            bg=BGCOL,
        )
        self._lbl_scale = Label(
            self,
            text="Scale",
            fg=LBLCOL,
            bg=BGCOL,
        )
        self._lbl_miny = Label(
            self,
            text=MINY.format(""),
            fg=LBLCOL,
            bg=BGCOL,
        )
        self._lbl_maxy = Label(
            self,
            text=MAXY.format(""),
            fg=LBLCOL,
            bg=BGCOL,
        )
        self._lbl_timrange = Label(
            self,
            text="Time Range s",
            fg=LBLCOL,
            bg=BGCOL,
        )
        self._lbl_maxpoints = Label(
            self,
            text="Max Points",
            fg=LBLCOL,
            bg=BGCOL,
        )
        self._ent_id = [None] * self._num_chans
        self._ent_name = [None] * self._num_chans
```

--------------------------------

### marker property

Source: https://www.semuconsulting.com/pygpsclient/pygpsclient.html

Gets or sets the marker point.

```APIDOC
_property _marker _: Point_

    Getter for marker.

    Returns:
      marked location

    Return type:
      Point
```

--------------------------------

### Initialize SysmonChart

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/sysmon_frame.html

Initializes the system monitor chart by clearing existing data.

```python
def init_chart(self):
        """
        Initialise sysmon chart.
        """

        self._canvas.delete(TAG_DATA)
```

--------------------------------

### pygpsclient.helpers.brew_installed

Source: https://www.semuconsulting.com/pygpsclient/pygpsclient.html

Determines if the current Python installation is managed by Homebrew.

```APIDOC
## pygpsclient.helpers.brew_installed

### Description
Check if Python installed under Homebrew.
Some Python/tkinter installations under Homebrew cause a critical segmentation error when shell subprocesses are invoked.

### Returns
* **bool** – True if installed under Homebrew, False otherwise.
```

--------------------------------

### brew_installed

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/helpers.html

Determines if Python is installed via Homebrew on macOS.

```APIDOC
## brew_installed

### Description
Check if Python installed under Homebrew.

Some Python/tkinter installations under Homebrew cause
a critical segmentation error when shell subprocesses
are invoked.

### Returns
- bool: True if Python 3 is found in the Homebrew path, False otherwise.
```

--------------------------------

### track property

Source: https://www.semuconsulting.com/pygpsclient/pygpsclient.html

Gets or sets the current track data.

```APIDOC
_property _track _: list_

    Getter for track.

    Returns:
      recorded track

    Return type:
      list or None
```

--------------------------------

### Load Configuration from JSON File

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/configuration.html

This method loads configuration settings from a specified JSON file. It handles potential typos like 'mgtt' for 'mqtt' and checks for version compatibility, triggering a resave if the configuration version differs from the current application version.

```python
def loadfile(self, filename: str | NoneType = None) -> tuple:
        """
        Load configuration from json file.

        :param str | NoneType filename: config file name
        :return: tuple of filename and err message (or "" if OK)
        :rtype: tuple
        """

        fname, config, err = self.__app.file_handler.load_config(filename)
        key = ""
        val = 0
        resave = False
        if err == "":  # load succeeded
            for key, val in config.items():
                if key == "version_s" and val != version:
                    resave = True
                key = key.replace("mgtt", "mqtt")  # tolerate "mgtt" typo
```

--------------------------------

### zoom property

Source: https://www.semuconsulting.com/pygpsclient/pygpsclient.html

Gets or sets the current zoom level.

```APIDOC
_property _zoom _: int_

    Getter for zoom.

    Returns:
      applied zoom

    Return type:
      int or None
```

--------------------------------

### bounds property

Source: https://www.semuconsulting.com/pygpsclient/pygpsclient.html

Gets or sets the custom map bounds.

```APIDOC
_property _bounds _: Area_

    Getter for custom map bounds.

    Returns:
      bounds of displayed map

    Return type:
      Area or None
```

--------------------------------

### Initialize SkyviewFrame

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/skyview_frame.html

Initializes the SkyviewFrame, setting up the canvas and attaching event bindings for resizing.

```python
def __init__(self, app: Frame, parent: Frame, *args, **kwargs):
        """
        Constructor.

        :param Frame app: reference to main tkinter application
        :param Frame parent: reference to parent frame
        :param args: optional args to pass to Frame parent class
        :param kwargs: optional kwargs to pass to Frame parent class
        """

        self.__app = app  # Reference to main application class
        self.__master = self.__app.appmaster  # Reference to root class (Tk)

        super().__init__(parent, *args, **kwargs)

        def_w, def_h = WIDGETU2
        self.width = kwargs.get("width", def_w)
        self.height = kwargs.get("height", def_h)
        self.bg_col = BGCOL
        self.fg_col = FGCOL
        self._redraw = True
        self._waiting = True
        self._body()
        self._attach_events()
```

--------------------------------

### trackbounds property

Source: https://www.semuconsulting.com/pygpsclient/pygpsclient.html

Gets the bounds and center point of the current track.

```APIDOC
_property _trackbounds _: tuple_

    Getter for track bounds and center.

    Returns:
      tuple of (bounds, center point)

    Return type:
      (Area, Point)
```

--------------------------------

### Set up SkyviewFrame Widgets

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/skyview_frame.html

Configures the grid layout for the frame and creates the main canvas widget for displaying the sky view.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        self.grid_columnconfigure(0, weight=1)
        self.grid_rowconfigure(0, weight=1)
        self._canvas = CanvasCompass(
            self.__app,
            self,
            MODE_CEL,
            width=self.width,
            height=self.height,
            bg=self.bg_col,
        )
        self._canvas.grid(column=0, row=0, sticky=NSEW)
```

--------------------------------

### Get Total Count

Source: https://www.semuconsulting.com/pygpsclient/_modules/collections.html

Calculate the sum of all counts for all elements in the Counter.

```python
sum(c.values())

```

--------------------------------

### BannerFrame Initialization

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/banner_frame.html

Initializes the BannerFrame, setting up references to the main application and its master, and loading necessary image assets for UI elements.

```python
class BannerFrame(Frame):
    """
    Banner frame class.
    """



    def __init__(self, app: Frame, parent: Frame, *args, **kwargs):
        """
        Constructor.

        :param Frame app: reference to main tkinter application
        :param Frame parent: reference to parent frame
        :param args: optional args to pass to Frame parent class
        :param kwargs: optional kwargs to pass to Frame parent class
        """

        self.__app = app  # Reference to main application class
        self.__master = self.__app.appmaster  # Reference to root class (Tk)

        self._status = False
        self._show_advanced = False
        self._img_conn = ImageTk.PhotoImage(Image.open(ICON_CONN))
        self._img_serial = ImageTk.PhotoImage(Image.open(ICON_SERIAL))
        self._img_socket = ImageTk.PhotoImage(Image.open(ICON_SOCKET))
        self._img_file = ImageTk.PhotoImage(Image.open(ICON_LOGREAD))
        self._img_disconn = ImageTk.PhotoImage(Image.open(ICON_DISCONN))
        self._img_expand = ImageTk.PhotoImage(Image.open(ICON_EXPAND))
        self._img_contract = ImageTk.PhotoImage(Image.open(ICON_CONTRACT))
        self._img_transmit = ImageTk.PhotoImage(Image.open(ICON_TRANSMIT))
        self._img_noclient = ImageTk.PhotoImage(Image.open(ICON_NOCLIENT))
        self._img_ntrip = ImageTk.PhotoImage(Image.open(ICON_NTRIPCONFIG))
        self._img_spartn = ImageTk.PhotoImage(Image.open(ICON_SPARTNCONFIG))
        self._img_blank = ImageTk.PhotoImage(Image.open(ICON_BLANK))

        super().__init__(parent, *args, **kwargs)

        self.width, self.height = self.get_size()

        self._body()
        self._do_layout()
        self._attach_events()
```

--------------------------------

### clientid getter/setter

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/spartn_dialog.html

Gets or sets the client ID for the IP client.

```APIDOC
## clientid

### Description
Getter and setter for the Client ID from the IP configuration dialog.

### Method
`clientid(self) -> str` (getter)
`clientid(self, clientid: str)` (setter)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
```python
# Get client ID
current_client_id = spartn_dialog_instance.clientid

# Set client ID
spartn_dialog_instance.clientid = "new_client_id_123"
```

### Response
#### Success Response (200)
- **clientid** (str) - The client ID.

#### Response Example
```json
{
  "clientid": "current_client_id_abc"
}
```
```

--------------------------------

### Load Configuration File

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Loads the application's configuration from a file. It includes checks for active connections and updates widgets and layout upon successful loading. If loading is cancelled, it does nothing.

```python
def load_config(self):
        """
        Load configuration file menu option.
        """

        # Warn if Streaming, NTRIP or SPARTN clients are running
        if self.conn_status == DISCONNECTED and self.rtk_conn_status == DISCONNECTED:
            self.status_label = ("", OKCOL)
        else:
            self.status_label = (DLGSTOPRTK, ERRCOL)
            return

        _, err = self.configuration.loadfile()
        if err == "":  # load succeeded
            self.update_widgets()
            for frm in (
                self.frm_settings.frm_settings,
                self.frm_settings.frm_serial,
                self.frm_settings.frm_socketclient,
            ):
                frm.reset()
            self._do_layout()
        elif err == "cancelled":
            pass
```

--------------------------------

### server getter/setter

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/spartn_dialog.html

Gets or sets the server address for the IP client.

```APIDOC
## server

### Description
Getter and setter for the server address.

### Method
`server(self) -> str` (getter)
`server(self, server: str)` (setter)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
```python
# Get server
current_server = spartn_dialog_instance.server

# Set server
spartn_dialog_instance.server = "new.server.com"
```

### Response
#### Success Response (200)
- **server** (str) - The server address.

#### Response Example
```json
{
  "server": "current.server.com"
}
```
```

--------------------------------

### pygpsclient.helpers.get_point_at_vector

Source: https://www.semuconsulting.com/pygpsclient/pygpsclient.html

Calculates a new geographical point based on a starting point, distance, and bearing.

```APIDOC
## pygpsclient.helpers.get_point_at_vector

### Description
Get new point at vector from start position.

### Parameters
* **start** (Point) – starting position
* **dist** (float) – vector distance
* **bearing** (float) – vector bearing (true)
* **radius** (float) – optional radius of sphere, defaults to mean radius of earth

### Returns
new position as lat/lon

### Return type
Point
```

--------------------------------

### sockserver_start

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/app.html

Starts the socket server thread, which can be used for NTRIP casting or other socket-based communication.

```APIDOC
## sockserver_start

### Description
Start socket server thread.

### Method
- `ntriprtcmstr` (str): source table string indicating RTCM3 types and intervals
```

--------------------------------

### Initialize SBFHandler

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/sbf_handler.html

Initializes the SBFHandler with a reference to the main application. Sets up internal attributes and logging.

```python
def __init__(self, app):
        """
        Constructor.

        :param Frame app: reference to main tkinter application
        """

        self.__app = app  # Reference to main application class
        self.__master = self.__app.appmaster  # Reference to root class (Tk)
        self.logger = logging.getLogger(__name__)

        self._cdb = 0
        self._raw_data = None
        self._parsed_data = None
        # Holds array of current satellites
        self.gsv_data = {}
```

--------------------------------

### Open Configuration File Dialog

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/recorder_dialog.html

Opens a file dialog for the user to select a configuration file. Supports multiple file types including binary, TTY, u-center UBX, and all files.

```python
def _open_configfile(self):
        """
        Open configuration file.
        """

        return self.__app.file_handler.open_file(
            self, 
            "bin",
            (
                ("config files", "*.bin"),
                ("TTY config files", "*.tty"),
                ("u-center UBX config files", "*.txt"),
                ("all files", "*.*"),
            ),
        )
```

--------------------------------

### Build TTYPresetDialog Widgets

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/tty_preset_dialog.html

Sets up the frame and widgets for the TTY Preset and User-defined configuration command dialog. This includes input fields, checkboxes, listboxes, and buttons.

```python
def _body(self):
        """
        Set up frame and widgets.
        """

        self.frm_device_info = Hardware_Info_Frame(
            self.__app, self, protocol="TTY", borderwidth=2, relief="groove"
        )
        self._frm_body = Frame(self.container, borderwidth=2, relief="groove")
        self._lbl_command = Label(
            self._frm_body,
            text="Command",
        )
        self._ent_command = Entry(
            self._frm_body,
            textvariable=self._command,
            relief="sunken",
            width=50,
        )
        self._chk_crlf = Checkbutton(
            self._frm_body,
            text="CRLF",
            variable=self._crlf,
        )
        self._chk_echo = Checkbutton(
            self._frm_body,
            text="Echo",
            variable=self._echo,
        )
        self._chk_delay = Checkbutton(
            self._frm_body,
            text="Delay",
            variable=self._delay,
        )
        self._lbl_presets = Label(self._frm_body, text="Preset TTY Commands", anchor=W)
        self._lbx_preset = Listbox(
            self._frm_body,
            border=2,
            relief="sunken",
            height=20,
            width=55,
            justify=LEFT,
            exportselection=False,
        )
        self._scr_presetv = Scrollbar(self._frm_body, orient=VERTICAL)
        self._scr_preseth = Scrollbar(self._frm_body, orient=HORIZONTAL)
        self._lbx_preset.config(yscrollcommand=self._scr_presetv.set)
        self._lbx_preset.config(xscrollcommand=self._scr_preseth.set)
        self._scr_presetv.config(command=self._lbx_preset.yview)
        self._scr_preseth.config(command=self._lbx_preset.xview)
        self._lbl_send_command = Label(self._frm_body, image=self.img_none)
        self._btn_send_command = Button(
            self._frm_body,
            image=self.img_send,
            width=50,
            command=self._on_send_command,
        )
```

--------------------------------

### Get Canvas Mode

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/canvas_subclasses.html

Retrieves the current display mode of the canvas. This is a simple getter property.

```python
    @property
    def mode(self) -> str:
        """
        Getter for mode.

        :return: mode as string
        :rtype: str
        """

        return self._mode
```

--------------------------------

### Load Configuration File

Source: https://www.semuconsulting.com/pygpsclient/_modules/pygpsclient/file_handler.html

Loads a JSON configuration file. Defaults to $HOME/pygpsclient.json or prompts the user if no filename is provided. Validates the configuration upon loading.

```python
def load_config(self, filename: Path = CONFIGFILE) -> tuple:
        """
        Load configuration file. If filename is not provided, defaults
        to $HOME/pygpsclient.json, otherwise user is prompted for path.

        :param Path filename: fully qualified filename, or None for prompt
        :return: filename, saved settings as dictionary and any error message
        :rtype: tuple
        """

        try:
            if filename is None:
                filename = self.open_file(
                    None,
                    "config",
                    (
                        ("config files", "*.json"),
                        ("all files", "*.*"),
                    ),
                )
                if filename is None:
                    return (None, None, "cancelled")  # User cancelled

            with open(filename, "r", encoding="utf-8") as jsonfile:
                config = json.load(jsonfile)
                err = self.validate_config(config)
                if err != "":
                    raise ValueError(err)
        except (ValueError, OSError, json.JSONDecodeError) as err:
            return (filename, None, str(err))

        return (filename, config, "")
```