Raspberry Pi Model 4 B 4GB

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Raspberry Pi Model 4 B 4GB
Classy i3detroit classroom media pc raspi4.png
Name Classy the Classroom Raspberry Pi Computer
Zone Classroom


Owner i3Detroit - Classroom Zone
Make Model Raspberry Pi Model 4 B 4GB Rev 1.2 (c03112)
Part Number 100000006f491cee
Date Acquired 2021-11-05
Storage Location Classroom shelf (near TV)
Authorization Required No
Status Running
Value TBA


Hostname classy
Documentation https://www.raspberrypi.org/products/raspberry-pi-4-model-b/

https://www.kingston.com/datasheets/SA400_en.pdf https://www.raspberrypi.com/documentation/computers/os.html

Other References


Intro

Classy the Raspberry Pi Classroom Computer and Media Center

The primary use of this computer system is to assist with demos, presentations, and lectures taking place in the classroom.

This classroom presentation / media center PC is a Raspberry Pi 4 Model B Single-board Computer connected to the 4k TV mounted on the western wall in the Classroom Zone. It has 4 GB of RAM and 480GB of SSD storage. (Unlike most Pi's, which primarily use lower capacity SD cards.) The choice of using a SSD over a SD card for storage is for more for stability of the system rather than providing a lot of data space.
This computer's name is Classy, as is classy is it's hostname.
A powered 4 port USB 3.0 hub is provided for users for connecting additional USB peripherals, commonly such devices as a flash thumb storage or portable hard drives.
There are no USB-C type ports available. An adaptor will be required to use this type of connection.
Raspberry Pi Press website featuring some of their publications that can be found on this device. Late 2021.
Raspberry Pi Press's rich library of computing and DIY maker books and magazines have all been downloaded [all to date as of 2022-05-08] and is available in the student user's Bookshelf directory.

(Select: Raspberry Menu (purple berry icon) from the task bar, choose "Help", then click on "Bookshelf".)

Or navigate to /home/student/Bookshelf.


If you would like to help with mitigating the costs and for the acquisition of peripherals associated with this equipment, please consider donating funds via the Classroom Zone's PayPal link.


Rules

  • Keep It Classy, Be Excellent!
  • Be mindful that this system is primarily for classroom presentation use.
    • Entertainment / Personal Use: While someone else is hosting a scheduled class, or while the space is being used as someone's refuge from noise from the rest of the facility (i.e studying), or when folks participating in Craft Room activities of this shared space while not desiring distractions - such personal use would be rude and definitely Not Keeping It Classy!

      Routine Personal Use or seeking this computer to be the source of your primary computing for your project would not be welcome. Perhaps the Media Lab Zone is better suited for such needs.

      However Special Interest Groups (SIGs) and Zones looking for a platform to host material for their classes, curriculum, and/or demos is highly encouraged.
  • Conserve energy and turn the computer off when not in use. (Further instructions below.)
  • Classy the Classroom PC's home is in the classroom, specifically belongs at [To Do section: DIY Shelf]. Please make sure Classy is always where they belong.
  • Avoid using the already fully allotted USB ports on the Raspberry Pi / Argon40 ONE M.2 case itself. A powered USB is provided for connecting peripherals. The single USB-C port on the case is for system power supply only.
  • In regards to the main board's microSD card reader: Having a normally accessible card reader (for a Raspberry Pi SBC) is not the case with this unit, because of the Argon40 ONE M.2 enclosure requires taking apart and removing screws from the plastic base to access it. Unnecessary opening of this case is discouraged. The on board SD card reader is unavailable. Unless needing access for maintenance / repair of the computer itself, please use a USB based dongle SD card reader instead, when making disk images or general data access with SD cards.
  • Don't forget to sign out of your personal web services like email or Slack.

Instructions

Access

Location of the power button.
To Power Up the Raspberry Pi System:
  • You may need to use the TV remote to wake the screen. Click the red power button at the top of the remote. It takes about 12 seconds for the panel to wake and you should see a blue LED light at the middle bottom of the bevel, after turning on. Change the TV's input to HDMI #3, using the HDMI button near the bottom of the remote.
  • The case is well labelled as to where the power button is, only needs to be pressed once. A red LED will light at the lower front of the case should turn on.
Login:
User: student PW: KeepItClassy

General Use and Operations

Powered 4-Port USB 3.0 Hub connected to Classy.
Use the 4-port powered USB 3.0 hub to connect USB based peripherals (Data storage devices, game-pads, etc.). Each port has its own power switch, which lights up blue when activated. (View full image at the right to see an example.)
Support for exFAT has also been added for those with storage drives using this file system, common to Windows users.

When Not in Use

To Safely Shutdown the Raspberry Pi System:
  • Close all open applications.
    • Then shutdown:

Select: Raspberry Menu (purple berry icon), select: green "Walkout" icon, choose "Shutdown" from the menu and the unit will turn itself off after a moment with the red LED in front of the case turning off.

Advanced Use

Raspberry Pi 4 Model B in an Argon40 ONE m.2 Case with GPIO (General-Purpose Input/Output) pins exposed.
This case allows for access to the RasPi's 40 Pin GPIO (General-Purpose Input/Output), which can be used for demos of sensors, LED lighting, or other maker oriented projects.
GPIO provides a variety of alternative functions based on various technologies such as SPI (Serial Peripheral Interface, often pronounced as 'spy'), I²C or I2C (Inter-Integrated Circuit, often pronounced as 'eye squared cee'), PWM (Pulse-width Modulation), and other Serial Communication methods (i.e. TX and RX).

Users whom are proficient with GPIO use & that have a general electronics safety mindset *and* have the ability to fix / replace a broken RasPi, within a reasonable time frame, are welcome to use this feature of the system.

The GPIO is accessed by removing the cover. Magnets hold the cover in place. (View full image at the right to see pin labels.)

(Default setting is that GPIO pins are *not* activated. This can be changed by using sudo raspi-config with an elevated privileged user. Additional configuration may also be necessary.)

Maintenance Info

Installed Software

The basic desktop version was installed, rather than the version with all of the "recommended software", to discourage software bloat, increase stability, and promoting best practice in operational security.

Preinstalled:

  • Chromium (Web browser), Geany (Text Editor), RPi Imager (RPi's SDCard/disk image tool) Thony (Python IDE), and VLC media player.

Added:

  • KiCad (PBC design), some of the LibreOffice Suite (Calc, Impress, Writer), Pi-Safe (Backup solution), and VSCode (IDE, currently configured for Python programming. Also hardware acceleration is disabled.).

Included Resources:

  • Bookshelf has been fully populated with all available media [all to date as of 2022-05-08].

Non-standard Bash Tools and Packages:

  • Exfat-fuse/Exfat-utils (Microsoft Windows ExFAT file system support. Instructions.), conky (System info tool.), Neofetch (System info tool.), Pipx (Install and run Python applications in isolated environments.), Stressberry (Stress tests and temperature plots.), sysbench (Scriptable multi-threaded benchmark tool.), and virtualenv (Creates an isolated Python environment so that you can install any module without affecting the system-wide configuration.).

Configuration Information

  • Argon ONE M.2 Case Fan and Temperature Configuration:
Original script used: curl https://download.argon40.com/argon1.sh | bash
Configuration is done via: argonone-config
FAN Control Settings: 38 C = 15%, 45 C = 33%, 55 C = 50%, 65 C = 66%, 70 C = 75%, 80 C = 100%
  • Overclocked to 2.0Ghz. (This specific unit's CPU ended up not being stable at 2.147GHz. We didn't win the silicon lottery with this one, unfortunately.)
  • Argon40 ONE Case defaults audio to AV jack instead to HDMI. If there is no sound via the monitor, on the desktop just right-click the Volume icon (bottom right) to make the change. Using raspi-config will not be needed in this case.
  • System Python Version: 3.9.2


Backup / Restoration

  • Emergency Restore From Back-Up Image
(This section is still a work in progress.)
There is a red generic Micro Center 16GB USB 3.1 flash drive that contains a disk image of the computer system, located in the shelf where the computer usually resides. A separate bootable USB flash drive, bootable portable drive, or similar device will be needed, in addition to the restoration flash drive.
Reminder: The micro SD-card slot is not accessible with this RasPi and you'll need to use the powered USB hub.
Rasberry Pi Imager can then be used to restore the install or manually done via dd can be used from the command line.
  • Creating Back-Up Images
Example of command used to make back up: sudo dd bs=4M if=/dev/sda of=/PATH/OF/YOUR/STORAGE/DEVICE/backup001_1970-01-01.img status=progress
Then the file was zipped since there was a lot of empty space replicated in the image.
  • The More User Friendly Method of Making Routine Backups and Restoring
TBA


Accessories / Parts List

Raspberry Pi 4 B SBC, Argon40 ONE M.2 Case, Official RP Power Supply (EU)
  • Argon40 ONE M.2 Case for Raspberry Pi 4: Adds access to an SSD drive. Built in fan. Has regular sized HDMI ports instead of RP4's micro-sized ones. Programmable IR receiver capable. MSRP: $45.00.
  • Kingston 480GB A400 M.2 Internal SSD: HAY, MA! No SD Card! Internal Solid State Disk based storage for increased reliability. Part: SA400M8/480G. MSRP: n/a (Paid: $59.99. Nov. 2021).
  • Keyboard: ?
  • Mouse: ?
  • Generic Micro Center 16GB USB 3.1 Flash Drive (red): Bootable drive (RaspPi OS) with backup system image for recovery purposes only. Located in wall-mounted storage shelf. Donated via voucher to the zone by Thaddeus S. Retail: n/a.


Wish List

  • Bluetooth enabled (not 'wireless', as in requiring use of a USB dongle) portable keyboard and mouse or portable keyboard with integrated track-pad.
  • Screen Cleaner
  • Better Cable Management

FAQ

What is the standard user's login info?

  • User: student PW: KeepItClassy
Default User pi has been removed.

What is an elevated privilege user's login info?

  • This info is located under the GPIO cover of the Argon case and under the keyboard, PLEASE USE RESPONSIBLY. (If you break it using admin commands, then you should have the ability to fix it, otherwise please do not use this option if you don't fully know what you are doing.)

Can I create my own user account on this device?

  • Private user accounts on this device is discouraged.
  • First off, would doing so be necessary and would benefit the functions and operations of the classroom?
  • Second, are you okay with the user account you create (and associated data) be periodically deleted? Even with little or no notice? And that you are okay with being the sole person responsible to restore things back to how you prefer?
The reality of development oriented systems such as Raspberry Pi is that data loss is of a higher probability. Also: Do not store any data on this system that you cannot afford to lose and have not backed up elsewhere.

Can I print anything from this computer?

What is the Operating System used on this device?

  • Raspberry Pi OS Version: 2022-04-20 64bit ARM with Desktop (AKA Bullseye). Note, as of November 2021, the 64bit version is used here rather than the default 'legacy' 32bit one (which is still an uncommon linux distribution outside from SBCs.) and thus some standard software may not have been updated for use yet.



Any questions about the Raspberry Pi System can be directed to Classroom Zone Coordinator L.U. Cymry via Slack channel #classroom.


ToDo

  • Physical sign / QR Code for Classroom Zone PayPal link. (And Collections Box? Or at least instructions to use primary donations box.)


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