UDP Communication Projects

Overview

The projects consist of two Qt-based C++ applications designed for UDP communication: a sender and a receiver. These applications work together to send and receive UDP datagrams, demonstrating basic networking capabilities using Qt.

Technologies Used

• Qt Framework: A C++ framework for developing cross-platform applications with a graphical user interface (GUI).
• Qt Network Module: Provides classes for network programming, including QUdpSocket for UDP communication.
• Qt Widgets: Used for creating the user interface elements such as buttons, labels, and text fields.

Sender Application

Description

The sender application allows users to specify a target IP address and port number to send data to a receiver. It includes features for connecting and sending data via UDP.

Key Components

• QUdpSocket: Used for sending UDP datagrams.
• QPushButton: Triggers sending of data.
• QLabel: Displays the connection status.
• QTextEdit: Input field for the data to be sent.

Receiver Application

Description

The receiver application listens for incoming UDP datagrams on a specified port and displays the received data. It provides visual feedback on the connection status and displays incoming data in real-time.

Key Components

• QUdpSocket: Used for receiving UDP datagrams.
• QPushButton: Triggers the connection to the specified port.
• QLabel: Displays the connection status.
• QTextEdit: Shows the received data.

How They Connect

Sender Setup

• The sender application sets up a QUdpSocket to send datagrams.
• It allows the user to enter the IP address and port number of the receiver.
• When the user clicks the "Send" button, it sends data to the specified IP address and port.

Receiver Setup

• The receiver application sets up a QUdpSocket to receive datagrams.
• It allows the user to specify the port number to listen on.
• Once connected, it continuously listens for incoming datagrams and processes them as they arrive.

Communication

• The sender uses QUdpSocket::writeDatagram to send data to the receiver.
• The receiver uses QUdpSocket::readDatagram to receive and process incoming data.

Conclusion

These two projects demonstrate a simple UDP communication setup using the Qt framework. The sender application sends data to a specified IP address and port, while the receiver application listens on a specified port and displays the received data. This setup showcases the fundamental principles of UDP communication, including sending and receiving datagrams, and provides a practical example of network programming with Qt.

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Running the Project

Using the Application Directly

If you only want to use the application without making any modifications, follow these steps:

1. Check the build Folder:

   • Ensure that the build folder exists in the cloned repository.

2. Execute the Sender Application:

   • Navigate to the following path in the terminal or file explorer for the Sender application:

     UDPSender/build-UDPsender-Desktop_Qt_6_5_3_MinGW_64_bit-Debug/debug/UDPsender.exe
     

   • Double-click SenderApp.exe to launch the sender application.

3. Execute the Receiver Application:

   • Navigate to the following path in the terminal or file explorer for the Receiver application:

     UDPReceiver/build-UDPreceiver-Desktop_Qt_6_5_3_MinGW_64_bit-Debug/debug/UDPreceiver.exe
     

   • Double-click ReceiverApp.exe to launch the receiver application.

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