plotting real time data from serial port

[chaitu209]

Hi

I doing a wireless project in which the data from the receiver is sent to a PC over serial port for plotting in real time.

On the transmitter side, there is an A/D converter that converts analog signal to 8 bit digital data. This 8 bit data is sent to the receiver for real time viewing.

I have build a simple VI that reads data from the serial port and plots them.

For example: If I connect a sine wave at the input terminals of the A/D converter, I should get a sine wave output in the VI. Unfortunately, I don't get that.

I am attaching my VI to this post. Please somebody take  a look at it and tell me where is the mistake.

Thanks in advance... 

[Andy_C.]

Hello chaitu209,

Were you abe to confirm that the number of bytes is correct coming out of the serial port?

[Dennis_Knutson]

You need to better define what data is being sent. The program you wrote is for decoding ASCII - not 8 bit data and you really have no control over how much data you are reading at a time.

[chaitu209]

Sorry I have posted the same message in two different boards..

I receive a string of ascii characters from the serial port. Does lowering the baud rate controls the amount of data I receive?

[maldonado2933]

im having a very similar problem..... can you share your vi in a version 8.6 or below??    here is my post

http://forums.ni.com/ni/board/message?board.id=140&thread.id=38434