I am working with Ethernet based devices, similarly to http://www.rfcode.com/rfid-reader-inventory-tracking-system-m250-fixed-reader. Unfortunately, type of the devices I am using, have been out of production for number of years, and manufacture does not sell or support them anymore.
At work, we have pair of those devices and they work fine and show up on software provided by manufacturer at two different IPs: 192.168.69.240:6500 and 192.168.69.241:6500
So, I took one of the devices home with me and connected it to my PC through the Ethernet (direct connection, bypassing my home router). Tried various IPs, including the ones above and manufacture recommended IP.
My question: How can I find out IP address of the device that is connected to my PC through the Ethernet ? Running on Windows 7.
Clarification: At work, devices are plugged into into a network switch.
Edit(some additional information): At work, I connected the device, same way, I had it at home (PC was off company's network) Surprisingly, device with IP 192.168.69.240:6500 worked fine. Took the same device back home, it didn't work ! Later on today, I will try different PC.
Best Answer
I'm going to assume that "at work" they are connected to a network with DHCP, and the addresses you mentioned were assigned dynamically (or perhaps DHCP reservation).
If you connect the device directly to your PC, you will have to rely on APIPA addressing, which isn't very reliable or easy to work with.
Instead, connect the device to your home router. Your router will automatically assign it an address on the same subnet as your home PC. To find the address that your router has assigned it, log into your router, and look for the "client list" (sometimes referred to as a table, status, etc.) It will be a little different depending on your specific router, but here is an example of how to do this step-by-step with a Linksys router. Below is a picture of the client list from a TP-Link router.
Ideally it will be named something identifiable to you. If not, just try the address of each client until you get a connection.