SerialPort Class ( Component ) in Visual BASIC ( VB2008, VB2010, VB.NET ) for RS232 Communications. Phone:(705) 671-2652 Fax:(705) 671-6127 Email: VISUAL BASIC SERIALPORT CLASS ( COMPONENT ) WITH ADR ( RS232 ) DEVICES IMPORTANT: For a tutorial on using the MSCOMM control with older versions of Visual Basic See: NOTE1: This programming guide assumes the user has a basic knowledge of Visual Basic programming.
The teaching method used is to show a basic example of a VB2010 program which communicates with an ADR board by sending and receiving ASCII data, and then dissect the program to understand its operation. NOTE2: The procedure shown is identical for VB2008, VB2010 and also runs on Express versions. NOTE3: The entire project can be downloaded here. Install Enterprise Manager Console Oracle 11g.
(98K) require the sending and receiving of ASCII data via RS232 to operate. To communicate with the ADR boards using Visual Basic, the SerialPort component must be utilized to allow serial data transfer via a serial port ( Com1-Com99). SerialPort is a component shipped with VB2008 and VB2010 and must be loaded using the Toolbox/Components menu. The following SerialPort VB2010 Example program is used to communicate with an. The is an RS232 based data acquisition interface that uses simple CR ( Chr(13) ) terminated ASCII strings to read two 12-bit analog input channels and control an 8-bit digital I/O port. The program can be modified to work with any ONTRAK or other manufacturers RS232 based product. Figure 1: SerialPort VB2010 Example Form1 The program was built using a pull down menu for COM port selection, an OPEN COM Port button, three Send command buttons, and a text box to display received ASCII data.
Serial Port Using Visual Basic.NET and Windows Introduction. Serial-port-vb.doc 4 2/1/2010 To read several bytes. Buffer is where the data is stored. This lesson describes the SerialPort control in Visual Basic. Serial ports, and provides properties and methods for reading and configuring the port's. Visual Basic; Web Development; Site. How can i read hex data from serial port in vb.net. 'how can I read binary data from the serial port in VB.NET?' But reading data in Visual Basic 2013. Reading Data from Serial Port RS232 in Visual Basic 2013 (Visual Studio.NET).
When run, the port is selected using the Pull-Down Menu and enabled when the OPEN COM Port button is clicked. The Send RDO button sends an ASCII ' RDO' + Chr(13) out on the COM port. The Chr(13) is required by the ADR112 to tell it a command has been received.
Two additional buttons send SETPA0 and RESPA0 commands ( also terminated with Chr(13)) to set or reset Bit PA0 on PORTA of the ADR112. Figure 2 shows the program running with an ADR112 connected to COM3. When the Send RD0 button was pressed, the ADR112 returned ASCII 1711. This shows the ADR112 analog port 0 is at 1711/4095 X 5 =2.0891V. The number 4095 is the full scale input of the ADR112 which is 5VDC. Figure 2: SerialPort VB2010 Example Running The entire program code is shown in Figure 3 and Figure 4.
The code is heavily commented and a few explanations are provided below each figure. Figure 3: Opening the COM Port and Some Housekeeping.
In Figure 3, we first declare a COM port assign it a label of ADRport. Next, we check to see if the port is already open and if so we close it. The next block of code creates our pull down combobox with an array of com ports from COM1 to COM20. John Coltrane Newport 63 Rar Download. This value can be increased if desired. The last block of code is for the 'OPEN COM Port' button.
When the button is pressed, the value in the combobox is used to open the selected COM port and give it a label of ADRport. Further, the text string 'CPA11111110' + Chr(13) is sent out on the COM port to configure the Digital I/O port so that PA0 is an output. This is required by the ADR112 and depending on your hardware, initialization may or may not be required.
Figure 4: Sending Commands and Receiving Data Figure 4 is where the sending and receiving of data happens under control of the buttons on Form1. The first block of code uses TRY CATCH to send an 'RDO' + Chr(13) to the ADR112 to retrieve the value of analog port AN0.