Qt TCP Server with Config Viewer

A lightweight Qt-based project for handling JSON-based TCP commands via a configurable server — optionally with a graphical user interface for configuration and display.

Features

• JSON-based GET/SET commands
• TCP server with configurable port
• Singleton DataModel for managing configuration data
• Optional Qt-based UI

Dependencies

• C++17
• Qt 5:
  • core
  • gui
  • widgets
  • network

Compiling

qmake

qmake
make

cmake

tbd

Execute

./_Server -c <path> [-p <port>] [-ui]

Parameter

Parameter	Typ	Description
-c <path>	REQ	Path to JSON config
-p <port>	OPT	TCP-Port (default: 12345)
-ui	OPT	Start with UI to display data model
-h, --help	INF	Show help menu

Communication

The server accepts simple JSON messages over TCP.

Telnet

telnet 127.0.0.1 <port>

GET

{"request":"get","path":"<path.to.value>"}

GET-Dummys

{"request":"get","path":"description"}
{"request":"get","path":"safety.emergency_shutdown.enabled"}
{"request":"get","path":"snowmaking_system.settings.air_pressure.value"}
{"request":"get","path":"snowmaking_system.maintenance.last_serviced"}
{"request":"get","path":"elements.element3.status"}

SET

{"request":"<set>","path":"<path.to.value>","value":"<value>"}

SET-Dummys

{"request":"set","path":"description","value":"new_description"}
{"request":"set","path":"safety.manual_override.enabled","value":false}
{"request":"set","path":"snowmaking_system.settings.fan_speed.value","value":1800}
{"request":"set","path":"elements.element1.status","value":"closed"}
{"request":"set","path":"snowmaking_system.operational_conditions.temperature_min","value":-10}

MVC

+-------------------+       +-------------------+
|   ConfigView (UI) |<----->|   TCP_Server      |
+-------------------+       +-------------------+
           |                          |
           +--------------------------+
                      |
               +--------------+
               |  DataModel   |
               +--------------+
                      |
             JSON-Data from Disk

TODOs

_Server

• Handle JSON-Arrays
• Logging, Watchdog, etc.
• CMake Support

UI

• Control Elements
• LogView

Datamodel

• JSON-Array

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License

This project is licensed under the LGPL v3 License. See LICENSE for details.

Note on Qt Usage

This project uses the Qt framework, which is licensed under the GNU Lesser General Public License (LGPL) v3. For more information about Qt’s licensing terms, visit:

https://www.qt.io/licensing/

The source code for the used Qt libraries is available at:

https://download.qt.io/archive/qt/

Dynamic linking with Qt is used in accordance with the terms of the LGPL v3.