Serial Port in VB2005

[victoryhighway2]

Hello,
I'm pretty new to VB2005 and the .NET world in general. I'm trying to write a VB app that uses the serial port to communicate with a hardware device. I'm trying to use the new System.IO.Ports.SerialPort class. I don't want to have to mess with using a COM component through Interop.

I'm having a little bit of difficulty. I can send data through but not recieve. I'm running a serial port monitor application that intercepts all serial traffic between the PC and the device, and it is indicating that the proper response is coming back from the device, but my application is not seeing it.

Is there anyone familiar with this topic that can help me out?

Thanks,
Geoffrey

 

[Mastakilla]

I just opened google and the type "vb2005 serial ports read" and the first result is a page where there's a link pointing at a complete example.

the page i've found:

http://www.vbwm.com/forums/topic.asp?TOPIC_ID=5030

 

[ca8msm]

I've never had the need to use serial ports myself, so this is not based on any experience, but I would imagine that you would want to look at the Read method and the DataReceived event:

http://msdn2.microsoft.com/en-us/library/ms143549.aspx

http://msdn2.microsoft.com/en-us/library/system.io.ports.serialport.datareceived.aspx

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[victoryhighway2]

Thanks for your replies guys, but I'm afraid that I'm still lost. See, what I'm trying to do is send commands from a PC to a hardware device using the serial (RS232) interface. Once I send the command, I need to wait for a response from the device. This was quite easy in VB6, aka just sit in a do loop until you've recieved the right number of bytes or you've timed out. I haven't yet found a way of doing this in VB. I've been looking into Dick Grier's terminal application. I've set up my application similar to his (except I'm not using multi-threading). I don't know why, but the SerialDataRecieved event (which currently only displays the serialport.readexisting in a messagebox) never fires. I have the RecievedBytesThreshold propery set to 1 byte. My serial port monitor tells me that data was recieved, but my app never sees it.

I'm really at a loss and am starting to get frustrated.