Some years ago, I wrote a LV application which controls a given number of DUTs (not represented on the pictures) and queries the status of the climate chamber by a serial communication. The test cycle is started by the operator and the application doesn't send any command (only query of the status) to the climate chamber.
Now, in order to double the number of DUTs but without the need to buy another expensive and bulky climate chamber, we want to go to this configuration.
The same application runs on both computers. It must be possible to use each of the two computers separately but also both at a time.
Which interface or technique would you use to share the COM port of the climate chamber ? A solution requiring no (or only a minor) adaptation of the application will be preferred.
Many thanks in advance.