Revision as of 15:45, 19 January 2021

References

• Robotis Turtlebot3 eMnuall SBC Setup
• Section 3.2 SBC Setup

Prepare micoSD Card

• Section 3.2.1
• Download the ubuntu-18.04.3-preinstalled-server-arm64+raspi3.img.xz image for your SBC from the links below.
  • Ubuntu 18.04.3 Preinstalled Server ARM64 for Raspberry Pi3

 $ cd TB3Install

 TB3Install$ mv ~/Downloads/ubuntu-18.04.3-preinstalled-server-arm64+raspi3.img.xz .

 TB3Install$ unxz < ubuntu-18.04.3-preinstalled-server-arm64+raspi3.img.xz > ubuntu-18.04.3-preinstalled-server-arm64+raspi3.img

• Run the Disks application
  • To find it go to the "Show Applications" icon in the bottom left corner of the desktop.
  • Search for "Disks"
• In the upper right corner of the Disks app window is a "hamburger" menu (3 horizontal lines).
• Select the "Restore Disk Image" menu item
• Do what makes sense

Useful References

• How Do I Uncompress a Tarball that Uses xz

 If for some reason the tar solutions don’t work (perhaps because you’re using the OS X built-ins), try this: 
   unxz < file.tar.xz > file.tar

 which is equivalent to:
   xz -dc < file.tar.xz > file.tar

 Then use tar to untar the file.

• https://www.maketecheasier.com/backup-hard-drive-gnome-disk-utility/ Backup Hard Drive Gnome Disk Utility]

Boot Up the Raspberry Pi

• Section 3.2.2

Configure the Raspberry Pi

• Section 3.2.3
• I believe this is what I did but I couldn't capture my keystrokes

Log into the Pi

• username: ubuntu
• passwd: ubuntu which I changed

Disable Automatic update

 $ sudo nano /etc/apt/apt.conf.d/20auto-upgrades

Change the update settings

 APT::Periodic::Update-Package-Lists "0";
 APT::Periodic::Unattended-Upgrade "0";

Configure wifi (I had trouble with the syntax and indention so it took a few tries0

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

$ cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    version: 2
    ethernets:
        eth0:
            dhcp4: true
            match:
                macaddress: b8:27:eb:0b:5d:ce
            set-name: eth0
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: yes
      dhcp6: yes
      optional: true
  wifis:
    wlan0:
      dhcp4: yes
      dhcp6: yes
      access-points:
        "xxx":
          password: "xxx"

Apply configuration

 $ sudo netplan apply
 $ reboot

Prevent boot-up if no network setup

 $ systemctl mask systemd-networkd-wait-online.service
        unit sleep.target does not exist, proceeding anyway

Disable Suspend and Hibernate

 $ sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
        Created symlink /etc/systemd/system/hybrid-sleep.target → /dev/null.

Enable SSH

 $ sudo apt install ssh

 $ sudo systemctl enable --now ssh

 $ reboot

Ops

TBD Check this out. I did this on Sisters (Remote PC) by mistake

 $  sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
       [sudo] password for eepp: 
       Created symlink /etc/systemd/system/sleep.target → /dev/null.
       Created symlink /etc/systemd/system/suspend.target → /dev/null.
       Created symlink /etc/systemd/system/hibernate.target → /dev/null.
       Created symlink /etc/systemd/system/hybrid-sleep.target → /dev/null.

Add Swap Space

• Section 3.2.4

 $ sudo swapoff /swapfile
     swapoff: /swapfile: swapoff failed: No such file or directory
 
 $ sudo fallocate -l 2G /swapfile
 
 $ sudo chmod 600 /swapfile

 $ sudo mkswap /swapfile
        Setting up swapspace version 1, size = 2 GiB (2147479552 bytes)
        no label, UUID=95adf48c-622b-418f-95ee-0918a19da735
        ubuntu@ubuntu:~$ sudo swapon /swapfile

TBD Missed doing this at swap creation. Now I can't

 $ sudo swapon /swapfile
        swapon: /swapfile: swapon failed: Device or resource busy
 

Append "/swapfile swap swap defaults 0 0" to the end of this file

$ sudo nano /etc/fstab
 
$ sudo free -h
                     total        used        free      shared  buff/cache   available
       Mem:           912M        106M        618M        4.4M        187M        786M
       Swap:          2.0G          0B        2.0G

$ cat /etc/fstab 
       LABEL=writable	/	 ext4	defaults	0 0
       LABEL=system-boot       /boot/firmware  vfat    defaults        0       1
       /swapfile swap swap defaults 0 0

Notes and Logs

• SBC Turtlebot3 Setup ROS 2 Dashing 202101 Note and Log