SHOLD I USE ALL THE HANDSHKING SIGNALS WHEN USING VISA READ AND WRITE?

[CHINTAN_11NOV]

I want to send string from com3 to com 4 using the example 'Basic 2 port serial write and read.vi'.How should I connect my com3 and com4 which are available on my pc.? Do I need to connect all the handshaking connections?

[Prabhakant_Patil]

I think it is not required to connect hand shaking signal.

You need to used crossed serial cable for the communication.

Regards

Prabhakant

https://decibel.ni.com/content/docs/DOC-16283

https://decibel.ni.com/content/docs/DOC-16642

[crossrulz]

In general, no.  There are some instruments that might require it, but between two COM ports on your computer you don't have to worry about it.  As said, just connect the TX of one port to the RX of the other and visa versa.  It also wouldn't hurt to connect the grounds.