I have done a Serial Communication connection through LabVIEW using RS-232 by short circiuting pin no. 2 and 3 of the 9 pin male (COM port)connector and using the read and write buffer ,at that time its reading the data whatever we write into the buffer.But now I am using the same procedure to analyse the output of the microcontroller PIC 16F628A by feeding the output signals Rx & Tx from microcontroller directly to the pins 2 & 3 and into the read buffer, now its showing some error (as indicated in the attachment).So,please suggest me accordingly.