= ISDN

== Concept Internet Streaming Digital Node
The idea is to build a “as low cost as possible” device a speaker can use to remotely present. While there would be cheaper options for some of the components we also want to use off the shelf components that are world wide available or at least interchangeable. The idea of this project was born after first test with the RPI HQ Camera which provides a great quality / price ratio. The basic features, anticipated for the first revision are:

Camera to record the presenter

HDMI Input to capture slides / audio from a PC / Laptop

Headset for audio recording and intercom

Display to show the current image

Touchscreen for minima user interface

USB Storage to record locally

Stream via RTMP or SRT

== Nice to have

(for version 3.14)

=== → Software

Reconfiguration using qr-codes (e.g. using gst zbar plugin)

Tiny customizable / distributable firmware images

Integrated back-channel for audio and video

Using the back-channel to implement talks with multiple speakers

Integration into existing conference tools to allow audience participation (maybe serverside, to reduce locally required bandwidth and computing power)

Whiteboard and/or Pointer functionality

=== → Hardware

More stable and overall better case with less loose wires (especially the camera-flex…)

Integrating camera into a ring-light

Decouple camera+display to reduce camera wiggle when using the touchscreen

Solve power delivery issues for ring-light

Reduce desk-footprint

Better solution for audio (very cheap headsets are not the yellow from the egg)

== beta 1 (smartphone holder, smaller case / screen, different cam holder)

== beta 2 (final case, final screen, improvised tripod mount, final cam mount)

Camera casing

== Pre-Final

== Resources

https://c3voc.de/wiki/hardware:raspi-vc

== Research

64bit v8 vs 32bit v6 image performance needs to be analyzed

pi4 (BCM2711 A72) raspberrypiOS jpeg decoding cpu vs gpu https://github.com/kaksmet/jpeg-benchmark/

== BOM alles 30 mal ! === angekommen

Raspberry Pi 4 (4GB)

Raspberry Pi HQ Kamera 6mm Objektiv

Raspberry Pi HQ Kamera

Raspberry Pi USB-C Netzteil

Raspberry Pi microHDMI Adapter (für Fallback-Setup als reine Kamera)

Mini-Kühlkörper (ohne Lüfter)

Micso SD (SanDisk Ultra 16GB)

HDMI Kabel (2m)

Offizielles Raspberry Pi 7“ Touchscreen Dingsie

Komisches Plastikgehäuse für Pi+Touchscreen

USB HDMI Capture Nubsies

3/8“ auf 1/4” adapter nubsies zum stativ-montieren des display-gehäuses

=== bestellt (warte auf lieferung)

Stativ + Ringlicht

Kugelkopf für Kamera

1/4“ muttern (fehlkauf…)

USB Headset

=== sonstiges

Netzwerkkabel (Nehmen wir aus FrOSCon Bestand)

=== brauchen wir noch

3/8“ Muttern

1/4“ schrauben? (als notlösung für kamera-kugelkopf-montage, falls anderer ansatz scheitert)

USB verlängerung https://www.pollin.de/p/usb-2-0-hi-speed-verlaengerung-a-a-goobay-68622-0-3-m-schwarz-713451 (0,67€)

USB stick (mass storage für recording und config) e.g. https://www.pollin.de/p/usb3-0-stick-verbatim-pinstripe-32-gb-724191 https://geizhals.de/adata-dashdrive-uv150-schwarz-32gb-auv150-32g-rbk-a944553.html?hloc=de (6€)

cam gehäuse https://www.prusaprinters.org/prints/31241-simple-raspberry-pi-hq-camera-box/comments

== brauchen wir eventuell

transport box https://www.pollin.de/p/kunststoff-geraetekoffer-330x280x125-mm-schwarz-501265

== Hardware (copy from BOM when final)

https://www.instructables.com/id/Raspberry-Pi-Touchscreen-Setup/ touchscreen zusammen bauen

=== Werkzeug Das ist eine Packliste an Dingen, die wir zum zusammenbauen vermutlich benötigen werden.

Akkuschrauber/bohrer

Bohrer

3mm

4mm

6.5mm

8mm

9mm

Div. Schraubendreher

Heißklebedings

Schrauben

3,5 x 10 sollten passen?

unklar

Gewindeschneider-Akkubohrer-Adaptierungsgerät

(todo)

== Software

Voctomix2 + minimal gui (TBD)

https://gist.github.com/lukas2511/88087c4d116fd5485ed61ce2ebed03ec

mumble client headless (stb)

https://github.com/stblassitude/talkiepi

Binary in git repo, all configuration from command line options.

Sample command line: talkiepi -server mumble.c3lingo.org:64738 -username tony_tester -channel Tech

raspiOS 32bit (64bit muss man mal testen ob cam und encoder tut)

things we want to build our self make root

maybe add pi monitor http://giteduberger.fr/rpimonitor/

raspi-config

(we dont want it, it only adds devices we dont need an may eat cpu)

- derchris

openvpn client (ggf 2. openvpn VM oder aber auch wireguard aufsetzen das die nciht in unserm management netz hängen)

ssh

== Planning Board

https://c3voc.de/todo/b/yFCTKPEKP3zk8rqg9/project-isdn

== Packliste

Paketmaße: 30x27x20 (min. LxBxH in cm)

Raspberry Pi

Raspberry Pi + Touchscreen + Kamera

(+ USB-Stick, + HDMI-Stick mit Verlängerung)

Kugelkopf

Stativ

Stromkabel

Audio

Headset

Externer Anschluss

HDMI-Kabel

Netzwerk-Kabel

Licht

Ringleuchte

Stativ

Anderes

HDMI-Adapter (Für den Notfall)

Bluetooth-Fernbedienung

== Naming Scheme

Helium

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

Neon

Sodium

Magnesium

Aluminum

Silicon

Phosphorus

Sulfur

Chlorine

Argon

Potassium

Calcium

Hydrogen

Titanium

Vanadium

Chromium

Manganese

Iron

Cobalt

Nickel

Copper

Zinc

Gallium