Wasmer – The Universal WebAssembly Runtime
WAPM – WebAssembly Package Manager

GitHub

github.com/wasmerio/wasmer
github.com/wapmio

YouTube

WebAssembly On The Server??? Why?
The Truth about Rust/WebAssembly Performance

What is the default SSH username/password for OctoPrint/OctoPi?

Username: pi
Password: raspberry
Default Keyboard-Layout: en-UK!!

Change the keyboard layout on Raspberry Pi OS Lite

sudo raspi-config

How to Create a New User on Raspberry Pi?

sudo useradd andreas
sudo useradd andreas sudo
sudo deluser pi
userdel: user pi is currently used by process 394
/home/pi/oprint/bin/python /home/pi/oprint/bin/octoprint serve --host=127.0.0.1 --port=5000

interfaces

Bei Verwendung einer anderen Netzwerk-Management-Software, z.B. NetworkManager (NM) oder systemd-networkd, sollte von einer Bearbeitung der /etc/network/interfaces abgesehen werden. Diese Programme verwenden eigene Konfigurationsdateien, weshalb die Bearbeitung der Datei /etc/network/interfaces zur Konfiguration von Netzwerk-Verbindungen nicht sinnvoll ist.

Differences between /etc/dhcpcd.conf and /etc/network/interfaces?

/etc/network/interfaces                  legacy interfaces
/etc/dhcpcd.conf                         dhcpcd
/etc/NetworkManager/NetworkManager.conf  NetworkManager

$ systemctl --type=service

dhcpcd

$ systemctl status dhcpcd
● dhcpcd.service - DHCP Client Daemon
     Loaded: loaded (/lib/systemd/system/dhcpcd.service; enabled; vendor preset: enabled)
    Drop-In: /etc/systemd/system/dhcpcd.service.d
             └─wait.conf
     Active: active (running) since Thu 2022-09-22 02:20:46 BST; 27min ago
       Docs: man:dhcpcd(8)
    Process: 404 ExecStart=/usr/sbin/dhcpcd -w -q (code=exited, status=0/SUCCESS)
      Tasks: 2 (limit: 1472)
        CPU: 1.278s
     CGroup: /system.slice/dhcpcd.service
             ├─584 wpa_supplicant -B -c/etc/wpa_supplicant/wpa_supplicant.conf -iwlan0
             └─774 /usr/sbin/dhcpcd -w -q

$ systemctl status NetworkManager
● NetworkManager.service - Network Manager
     Loaded: loaded (/lib/systemd/system/NetworkManager.service; disabled; vendor preset: enabled)
    Drop-In: /usr/lib/systemd/system/NetworkManager.service.d
             └─10-dhcpcd.conf
     Active: inactive (dead)
       Docs: man:NetworkManager(8)

802.1X Authentifizierung in Rechnernetzen

$ sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
$ sudo wpa_supplicant -i eth0 -D wext -c /etc/wpa_supplicant/wpa_supplicant.conf  -d
$ sudo wpa_cli -i wlan0 reconfigure

NetworkManager

Configure Network Settings Using Network Manager in Linux

$ systemctl status dhcpcd
● dhcpcd.service - DHCP Client Daemon
     Loaded: loaded (/lib/systemd/system/dhcpcd.service; disabled; vendor preset: enabled)
    Drop-In: /etc/systemd/system/dhcpcd.service.d
             └─wait.conf
     Active: inactive (dead)
       Docs: man:dhcpcd(8)

$ systemctl status NetworkManager
● NetworkManager.service - Network Manager
     Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
    Drop-In: /usr/lib/systemd/system/NetworkManager.service.d
             └─10-dhcpcd.conf
     Active: active (running) since Mon 2023-03-27 17:36:29 BST; 15h ago
       Docs: man:NetworkManager(8)
   Main PID: 402 (NetworkManager)
      Tasks: 3 (limit: 1472)
        CPU: 4.121s
     CGroup: /system.slice/NetworkManager.service
             └─402 /usr/sbin/NetworkManager --no-daemon

Example:
$ nmcli device
DEVICE  TYPE      STATE            CONNECTION
wlp5s0  wifi      connected     MY_WIRELESS_CONN
enp0s3  ethernet  unavailable                 --
lo      loopback  unmanaged                   --

Device:
$ nmcli device
DEVICE         TYPE      STATE         CONNECTION
eth0           ethernet  connected     Wired connection 1
wlan0          wifi      disconnected  --
p2p-dev-wlan0  wifi-p2p  disconnected  --
lo             loopback  unmanaged     --

Rename connection

Network Manager – nmcli

$ nmcli conn
NAME                UUID                                  TYPE      DEVICE
Wired connection 1  42dd98b3-6bb3-39d4-8b9c-0b9575aafdce  ethernet  eth0
ZHAW1               97dace42-85f3-4dd7-81a2-f18d7c4132a7  wifi      --

$ sudo nmcli connection modify Wired\ connection\ 1 con-name ZHAW_eth0
$ sudo nmcli connection modify ZHAW1 con-name ZHAW_wifi

$ nmcli conn show
NAME       UUID                                  TYPE      DEVICE
ZHAW_eth0  42dd98b3-6bb3-39d4-8b9c-0b9575aafdce  ethernet  eth0
ZHAW_wifi  97dace42-85f3-4dd7-81a2-f18d7c4132a7  wifi      --

Remove entry

nmcli command does not remove ipv4.gateway setting

 $ sudo nmcli con edit id ZHAW_wifi

nmcli> remove 802-1x.anonymous-identity
nmcli> save
Connection 'ZHAW_wifi' (97dace42-85f3-4dd7-81a2-f18d7c4132a7) successfully updated.

nmcli> print 802-1x.anonymous-identity
802-1x.anonymous-identity: (null)

Ethernet 802.1x

802.1x with NetworkManager using nmcli

nmcli device
nmcli device show eth0
nmcli connection show
nmcli connection show id "Wired connection 1"
nmcli connection edit "Wired connection 1"

# nmcli con edit CONNECTION_NAME
nmcli> set ipv4.method auto
nmcli> set 802-1x.eap peap
nmcli> set 802-1x.identity <USERNAME>
nmcli> set 802-1x.phase2-auth mschapv2

nmcli> set 802-1x.password <PASSWORD> (one option)

nmcli> save
nmcli> quit

other option:
/etc/NetworkManager/system-connections/CONNECTION_NAME
[connection]
id=CONNECTION_NAME

[802-1x]
password=YOUR_8021X_PASSWORD

systemctl restart NetworkManager
nmcli con down CONNECTION_NAME
nmcli con up CONNECTION_NAME

Wifi 802.1x

Connect to a WPA2-Enterprise Connection via CLI (no desktop)

$ nmcli radio wifi
enabled

$ nmcli device wifi list
IN-USE  BSSID              SSID          MODE   CHAN  RATE        SIGNAL  BARS  SECURITY
        00:DF:1D:0C:B7:02  ZHAW-lowband  Infra  1     260 Mbit/s  57      ▂▄▆_  WPA2 802.1X
        00:DF:1D:0C:B7:04  eduroam       Infra  1     260 Mbit/s  57      ▂▄▆_  WPA2 802.1X

$ nmcli con add type wifi ifname wlan0 con-name ZHAW_wifi ssid ZHAW-lowband
Error: Failed to add 'ZHAW_wifi' connection: Insufficient privileges

$ sudo nmcli con add type wifi ifname wlan0 con-name ZHAW_wifi ssid ZHAW-lowband
$ sudo nmcli con edit id ZHAW_wifi

===| nmcli interactive connection editor |===

Editing existing '802-11-wireless' connection: 'ZHAW_wifi'

Type 'help' or '?' for available commands.
Type 'print' to show all the connection properties.
Type 'describe [<setting>.<prop>]' for detailed property description.

You may edit the following settings: connection, 802-11-wireless (wifi), 802-11-wireless-security (wifi-sec), 802-1x, ethtool, match, ipv4, ipv6, hostname, tc, proxy
nmcli> set ipv4.method auto
nmcli> set 802-1x.eap peap
nmcli> set 802-1x.phase2-auth mschapv2
nmcli> set 802-1x.identity <USERNAME>
nmcli> set 802-1x.password <PASSWORD>
nmcli> save
Connection 'ZHAW_wifi' (97dace42-85f3-4dd7-81a2-f18d7c4132a7) successfully updated.

nmcli> activate
Monitoring connection activation (press any key to continue)

\ connecting (configuring)

Error: Connection activation failed.

Passwords or encryption keys are required to access the wireless network 'ZHAW-lowband'.
\ connecting (need authentication)


nmcli> quit

Fusion 360

Fusion 360 – Case Study 17

SolidWorks

SolidWorks Intro 012(http://forum.vinamanic.vn)
Solidworks Mug

Off-Topic

How to draw a Nescafe Coffee Mug in Fusion 360 2020 Tutorial #005
Absolute Beginner Fusion360 Tutorial 2020 – a cup holder

Whitepaper – Kodierung von M12-Steckverbindern

• C++98
• C++03
• C++11
• C++14
• C++17
• C++20
• C++23

C++98

C++03

C++11 / C++0x

Core language runtime performance enhancements

• Rvalue references and move constructors
• constexpr – Generalized constant expressions
• Modification to the definition of plain old data

Core language build-time performance enhancements

• Extern template

Core language usability enhancements

• Initializer lists
• Uniform initialization
• Type inference
• Range-based for loop
• Lambda functions and expressions
• Alternative function syntax
• Object construction improvement
• Explicit overrides and final
• Null pointer constant
• Strongly typed enumerations
• Right angle bracket
• Explicit conversion operators
• Template aliases
• Unrestricted unions

Core language functionality improvements

• Variadic templates
• New string literals
• User-defined literals
• Multithreading memory model
• Thread-local storage
• Explicitly defaulted special member functions
• Explicitly deleted functions
• Type long long int
• Static assertions
• Allow sizeof to work on members of classes without an explicit object
• Control and query object alignment
• Allow garbage collected implementations
• Attributes

C++ standard library changes

Upgrades to standard library components

• Rvalue references and the associated move support
• Support for the UTF-16 encoding unit, and UTF-32 encoding unit Unicode character types
• Variadic templates (coupled with Rvalue references to allow for perfect forwarding)
• Compile-time constant expressions
• decltype
• explicit conversion operators
• Functions declared defaulted or deleted

Threading facilities

• std::thread
• std::mutex
• std::condition_variable
• std::async
• std::future

Tuple types

Hash tables

Regular expressions

General-purpose smart pointers

Extensible random number facility

Wrapper reference

Polymorphic wrappers for function objects

Type traits for metaprogramming

Uniform method for computing the return type of function objects

C++14 / C++1y

New language features

Function return type deduction

• auto

Alternate type deduction on declaration

• decltype

Relaxed constexpr restrictions

Variable templates

Aggregate member initialization

C++17

C++20

C++23

• streaming
• capture

OBS Project

tr.liste_weiss {
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  user-select: none;
}

• Enclosure / Enclosures
• Case / Cases
• Box / Boxes
• Housing / Housings

• MOISTURE
• humidity
• HARSH ENVIRONMENTS, harsh conditions
• rugged environment
• Air-tight
• gas-tight
• PROTECTION
• waterproof
• leak / leaking
• robust housing materials
• durable seals
• strong bolts
• to ensure a tight seal
• leak path
• prevent ability to equalize pressure

Hermetically Sealed Case for the Storage of Objects in a Stable, Inert Atmosphere
GORE: The Unknown Problem with Airtight Enclosures
GORE: Protective Vents for Outdoor Electronics

A GUIDE TO ENGINEERING MOISTURE & PRESSURE PROTECTION FOR SEALED ENCLOSURES
How to Prevent Condensation in Enclosures

Original Prusa XL

First look at the Original Prusa XL: CoreXY with an always-perfect first layer and plenty of new features!
Original Prusa XL Dev Diary #1 and FAQ, March 16. 2022
XL Update: Reworked Nextruder, new features and updated shipping information, August 5. 2022
XL Update #2 – More timelapses, a closer look at the electronics, Nextruder news and schedule update, November 10. 2022
XL Video Update: beta test news, hardware changes and shipping schedule, January 25. 2023

Enclosure

Multicolor Buddy Pug Timelapse printed on the Prusa 5-tool XL
Prusa XL Enclosure – SUMO Assembly Guide!

PU-Schaum und PUR-Schaum => Polyurethan

• Montageschaum
• Bauschaum
• Isolierschaum
• Dämmschaum
• Füllschaum

• Klebeschaum
• Zargenschaum
• Fensterschaum
• Brunnenschaum
• Brandschutzschaum

PU-Schaumarten kurz erklärt

• “Blockschaum”, der zu Platten und Formteilen geschnitten wird
• “Band- oder Plattenschaum” für Dach-, Wand- und Bodendämmung, der meist mit flexiblen Deckschichten versehen wird
• Verbundelemente (“Sandwichelemente”) für Dach- und Wandkonstruktionen bei Hallen, die aus starren Deckschichten mit Polyurethan-Kern bestehen
• der “vor Ort” aufgeschäumte “Ortschaum” (Dachspritzschaum, Spritzschaum, Gießschaum) zur Wärmedämmung bei Flachdächern, im Innenausbau und bei betriebstechnischen Anlagen (Behälter- und Rohrisolierung)
• “Montageschaum” zur Hohlraumverfüllung und -Dämmung und zu Montagezwecken (Dosenschaum)

Wann darf PU-Schaum nicht drücken?

• nicht drücken
• spreizdruckfrei
• gar nicht bzw. nur sehr gering aufquillt
• keine Schäden an Bauteilen hervorrufen kann