Скачать или смотреть How to read Arduino Serial Port in C# dotnet 8 WPF Application?

To Read the data from an Arduino serial port in C# .NET 8 we need to use the System.IO.Ports.SerialPort class. We need to add System.IO.Ports Namespace in our C# file.
using System.IO.Ports;
Then we have to create a SerialPort Object. For that we have to Instantiate a SerialPort object and specify the COM port and baud rate.

SerialPort serialPort = new SerialPort("COM3", 9600); // Replace COM3 with your Arduino's COM port

we can also configure other settings like Parity, DataBits, and StopBits if required.

serialPort.Parity = Parity.None;
serialPort.DataBits = 8;
serialPort.StopBits = StopBits.One;

serialPort.Open();

Now once serial port is opened and if Arduino sends data with newline characters (Serial.println()) we can use serialPort.ReadLine() to read a full line of text. This method blocks until a line is received.

string receivedData = serialPort.ReadLine();
Console.WriteLine("Received: " + receivedData);

But in WPF Based desktop application we need asynchronous and continuous data reading, so we have to subscribe to the DataReceived event like this,

serialPort.DataReceived += SerialPort_DataReceived;

// ...

private void SerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
SerialPort sp = (SerialPort)sender;
string data = sp.ReadExisting(); // Or sp.ReadLine() if sending lines
Console.WriteLine("Received: " + data);
// Process the received data here
}

We should definitely Implement try-catch blocks to handle potential exceptions like UnauthorizedAccessException if the port is already in use or TimeoutException if ReadTimeout is set.





Learn how to connect an Arduino DHT11 temperature & humidity sensor with a C# WPF .NET 8 desktop application to build a real-time sensor dashboard. In this tutorial, we’ll write the Arduino code to send sensor readings over the serial port, then read that data in C# using Serial.ReadLine(). With Dispatcher.Invoke, we’ll update the WPF UI safely, and a Regex parser will separate temperature and humidity values for display in their respective TextBlocks.

This step-by-step guide is perfect if you want to integrate Arduino with C# desktop applications, create IoT dashboards, or learn serial communication in .NET 8 WPF.

🔹 What you’ll learn in this tutorial:

Arduino code for DHT11 sensor (temperature & humidity)

Serial communication between Arduino and C# WPF

Reading serial data with SerialPort in .NET 8

Using Dispatcher.Invoke for real-time UI updates

Parsing data with Regex for temperature & humidity separation

Building a real-time desktop dashboard in WPF