acada robotics

ACADA Robotics • Documentation • ROS Course for Beginners • Robot and Workstation Setup • Network Setup

Add WiFi networks without reinitializing the SD card

To add networks at a later stage or modify existing settings, edit the /etc/netplan/50-cloud-init.yaml file on your robot.

sudo nano /etc/netplan/50-cloud-init.yaml

The file should look like:

network:
    version: 2
    wifis:
        renderer: networkd
        wlan0:
            access-points:
                SKYNET:
                    password: PASSWORD_STRING
            dhcp4: true
            optional: true

After modifying it, execute sudo netplan generate and sudo netplan apply.

If you can’t reach your robot, you can remove the SDCard from the RaspberryPI, and connect to a computer by means of an SDCard reader. You can manually edit this file then boot the RaspberryPI with the SDCard to gain access to your robot.

Test if the robot is connected to Internet

Execute the following command on the robot

ubuntu@robot$ sudo curl google.com

If connected to internet, command will return html from google.

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>301 Moved</TITLE></HEAD><BODY>
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.com/">here</A>.
</BODY></HTML>

Bridge the internet connection through your laptop with ethernet

If you can connect to the internet in an environment but your robot can’t follow the procedure below to bridge the connection between your laptop and your robot whenever you need internet access on the robot.

Now you should be able to SSH to your robot.

ssh robot

Next Section: Introduction to ROS

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