Tips on How to Find the IP Address Assigned to Your Ethernet Adapter

Refer to the figure below. On a Windows machine open a command window and type “ipconfig -all”. If you are using a Linux machine, we assume you already know how to set up networks.

The program will output the status of all the attached Ethernet, WiFi, and Bluetooth adapters. We are only interested in the adapters that are attached and on an Ethernet network.

Note the adapter called “USB for DVL”. In the network properties windows, I assigned it this name when I set up the adapter and its address (the default name was something like “Realtek USB Adapter”).

The IP address assigned to this adapter is (this is the PC’s IP address, not the DVL’s IP address). In binary this looks like 11000000.10101000.00000010.00000101. The subnet mask is In binary, this looks like 11111111.11111111.11111100.00000000. For IP addresses to be on the same subnet, anywhere there is a binary “1” in the subnet mask, the corresponding bits in the IP addresses must match. Note: if you follow the Blue Robotics directions, your PC’s address on the ROV network should be This means my PC’s “USB for DVL” adapter and a properly configured Blue Robotics PC are on the same subnet, and if the DVL is on its default fallback address of it’s also on the same subnet, and if a BlueROV is assigned its default address of, it’s on the same subnet as well.

Note that the PC office network IP address is, and the office network subnet mask is If all the devices mentioned in the previous paragraph were moved to my office network without changing any addresses, the PC could not talk to the DVL et al., nor vice versa (except for broadcast messages, which are generally sent by a PC to all its adapters and received by all stations on a network).

Bottom line: if you are using fallback or static addresses, you want to be sure the DVL is connected to a PC Ethernet interface on the proper subnet.

If the DVL receives its address using DHCP, then the DVL address should already be on the proper subnet to talk to a PC but may need to use a broadcast address to reach a Blue Robotics PC or ROV.

The “ping” command can be used to establish if a DVL is connected and is on a reachable subnet. The following figures show examples of the “ping” command. Linux machines have a “ping” command that works the same as the Windows “ping” for our purposes.

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