Serial Port Communication - Code. Project. Introduction. Serial port data can be read in many ways and many devices communicate via the serial port. In my project I had the need to implement serial port communication. RFID reader. This is a sample example to read data from the serial port and display on the. Windows Forms Text. Box control. Using the code.
To begin, let's create a C# Windows Forms application in Visual Studio 2. VS 2. 00. 5/2. 01. Add a textbox, a button control and a Serial. Port control on to the form.
Declare a string variable as private: privatestring Disp. String; In the form Load event , write the code as shown below: privatevoid Form. Load(object sender, Event. Args e). serial. Port. Port. Name = "COM5". Port. 1. Baud. Rate = 9. Port. 1. Parity = Parity.
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None. serial. Port. Stop. Bits = Stop. Bits. One. serial. Port. 1. Handshake = Handshake. None. serial. Port. Open(). serial. Port. Read. Timeout = 2.
Visual Basic Serial Port Software Example. Visual Basic is one of the easiest languages to use for serial port communications, the mscomm32.ocx driver controls all.
Port. 1. Is. Open). Disp. String = "". Card. Key. Deactivate.
Free download visual basic express serial port Files at Software Informer. Visual Studio is extensible by nature, ultimately consisting of a core. Arduino and Visual Basic Part. to be using a different COM port. The Visual Basic. Arduino and Visual Basic Part 1: Receiving Data From the Arduino ”. Visual Basic for Applications Serial Port Software Example. Visual Basic is used for many control applications, from simple communications, to elaborate test.
Text = "". serial. Port. 1. Data. Received += new Serial.
Data. Received. Event. Handler(serial. Port. Data. Received). }Although the code is self explanatory, I will explain little.
Windows Standard Serial Communications for Visual Basic. The Windows Standard Serial. create serial communications programs that access data from a serial port. Visual BASIC 6 /VB2008 Express Serial Communication. created using Visual Basic 2008 Express (free download from. you define the serial port. Example 3 - Receiving data using the Serial Port class. H RS-232C 1-port type assigned to COM1 over a USB connection and receives data. Start Visual Basic. Visual Basic free download. Get the latest version now. Visual Basic 2010 Express is part of the Visual Studio 2010 Express family.
When the application starts, the serial port is opened to read the received data,you need to set up an event. Port. 1. Data. Received += new Serial. Data. Received. Event. Handler(serial. Port. Data. Received); It is always better to set up the event before the serial port is opened.
Now lets declare an event handler to handle the event. The code to manipulate the read data can be specified here.
Port. 1_Data. Received(object sender, System. IO. Ports. Serial. Data. Received. Event. Args e). if (text. Box. 1. Text. Length > = 1. Port. 1. Close().
Disp. String = serial. Port. 1. Read. Existing(). Invoke(new Event.
Handler(Display. Text)). In my example the RFID tag had 1. So, I have set a condition to close the port if string variable has length of 1.
Actually RFID readers can read more than 1. Then you can store the values in some array and according to your need you can manipulate them. But if your tags have the same count like 8. BGFFJJJHG, 7. 87. HGGBVVV. and you have to make sure that each tag is read then you can specify some condition like the above code. You can use threading also but if you don't like to use threading then you can use a condition. Disp. String = serial.
Port. 1. Read. Existing(); I insist that you should use condition as the above code for a tag [7. HGGBVVV] may return values of one letter at a time and it will be very fast. So to make sure that a tag has been read completely find the length and use the condition to do some operation or read another tag.
Now, you can't assign the value read directly to a textbox in the same event handler as it will throw some exception. You have to use the Invoke method. Invoke(new Event. Handler(Display. Text)); The below Display. Text method is called by the invoke method.
Display. Text(object sender, Event. Args e). text. Box. Append. Text(Disp. String). }After the read operation is completed make sure you close the serial port. Port. 1. Is. Open). Port. 1. Close(); Points of Interest There are many ways to read data from serial port.