I have an HMI (Siemens MP 377) to print collected data on a LAN connected printer.
Now I would like that the data that are being sent to the printer is also received at a computer through Ethernet LAN. The HMI however has a single LAN port.
I have done some research on the internet already. Now the problem is that whether I should use LAN switch or HUB to copy the data so that both printer and computer receives the same data? Following, how would I visually see what is coming to the computer (or printer, because they both are receiving the same data)?