how to read data from serial port in vb.net ?

Question

I am trying to read data from rfid tag using rfid reader. i can connect reader, but cannot get data?

Answer 1

Try using the SerialPort class.

Answer 2

Make sure your cable is correct. The easiest way to accomplish this is to add a null modem adapter to your cable and see if things start communicating. When in doubt always blame the problem on the hardware.

Answer 3

The first and most common problem is to check that your serial port and your serial port code is operating as expected.

To do this create a "loop back". You can use a null modem adapter, or simply a paper clip.

Connect the paper clip to pins 2 & 3.

Now any data you send down the serial tx line should be received via the rx line.

Can you transmit and recieve data using this method with your vb.net program?