Hi Joe, thanks for the reply. Devices I am using are Citizen P291 printer and Zebra DS3678 scanner. I have the protocol block for the printer and I can communicate with them when they are connected to separate COM ports.
I doubt that these devices are capable of having a device id assigned to it. If they are, I am not sure how to assign these ID's.
If they are not capable of having device ID's, is it possible to have any additional hardware to be able to assign these devices an ID?