How to know which RJ45 port is configured on your robot? – kapptivate

If you have configured a static IP address on your robot, you may not know which ethernet port is concerned. Here is how to differentiate this port from the others.

Depending on the robot that you are using, this procedure can vary. Please refer to the section related to your hardware.

Case 1 - MacMini robots

For the MacMini robots, there is only one ethernet port. As a result, these robots are not concerned by this article.

Case 2 - Latest Linux robots (with graphical interface)

For this type of robot, the procedure is already detailed in this article: How to install a new Kapptivate robot (software part).

Case 3 - Old Linux robots (without graphical interface) using Ubuntu

The difference between this type of robot and the latest Linux robots is the absence of graphical interface when you connect a screen to the robot.

First of all, login to the robot using your credentials (login and password). Then, you can check what OS is installed on your robot. If it is Fedora, then you will only get this prompt:

fedora.png_width_129_height_19_name_fedora.png

If that's the case, you can refer to this section.

If your robot is using Ubuntu, then you should get this screen:

ubuntu_20(1).png_width_551_height_513_name_ubuntu_20(1).png

You can then type this command:

ifconfig -s

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Look at the rows starting with "enp". Spot the interface with RX/TX values not set to 0. In this example, the used interface is enp3s0. This is the interface that's connected to the RJ45 cable.

You can now type the following command:

ls /etc/netplan

4.29.31.png_width_438_height_62_name_Capture_20d_E2_80_99_C3_A9cran_202024-03-11_20_C3_A0_2014.29.31.png

You may get a different file name compared to the example above, the important thing is to get the name of the ".yaml" file.

Now, type the following command:

vim /etc/netplan/01-netcfg.yaml

If the name of your file is different, you need to adapt the command accordingly (or you can just type "vim /etc/netplan/" and press the Tab key to autocomplete).

You should get a result that looks like this:

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If an interface has been setup with a static IP then it is the one with dhcp set to “no”. In this example, the configured interface is enp1s0

You can exit the vim command by typing ":q!"

If the cable is connected to the right port, the "enp" interface that you just found should be the same as the one you found in this step. If it is not the same, just connect the cable to another RJ45 port and go back to this step

Case 4 - Old Linux robots (without graphical interface) using Fedora

First of all, login to the robot using your credentials (login and password). Then, you can check what OS is installed on your robot. If it is Fedora, then you will only get this prompt:

fedora.png_width_129_height_19_name_fedora.png

You can then type this command:

ifconfig -s

04-1.png_width_688_height_397_name_Capture_20d_E2_80_99_C3_A9cran_202024-03-11_20_C3_A0_2015.26.04-1.png

Look at the rows starting with "enp". Spot the interface with RX/TX values not set to 0. In this example, the used interface is enp2s0. This is the interface that's connected to the RJ45 cable.

You can now type the following command:

nmcli device show

Scroll up until you find the "enp" interface that you found in the previous step:

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The port configuration (IP, gateway and DNS) can be found here.

If the cable is connected to the right port, the "enp" interface that is configured with a static IP should be the same as the one you found in this step. If it is not the same, just connect the cable to another RJ45 port and go back to this step.