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Setup Pizzabox

Materials:

Raspberry Pi 3B+ with Pimoroni On/Off SHIM
Raspberry Pi OS Lite 2021-05-07
(later) Raspberry Pi Pico, connected via UART and power
USB Soundcard

Resources:

Initial Configuration:

Before First Boot

Enable ssh:
```
  cd <media/user>/boot
  touch ssh
```

Set fixed fallback ip on eth0:

  cd <media/user>/rootfs/etc
  sudo nano dhcpcd.conf

Uncomment the following lines:

  profile static_eth0
  static ip_address=10.10.0.23/24

  interface eth0
  fallback static_eth0

First Boot

Hook up pi to configuration system via ethernet, screen is optional. Insert SD-card, plug in OnOff SHIM
Connect via ssh:
```
  ssh pi@10.10.0.23
```
Use raspi-config tool to
- (optional) set up WiFi and connect (for updates, ...)
- enable camera
- enable serial
- change password to pizzabox
Apply changes and reboot.

Install Software

Update system

  sudo apt update
  sudo apt full-upgrade

Install python libraries:

  sudo apt install git python3-picamera python3-gpiozero python3-pip python3-setuptools python3-serial

Update NumPy:
```
  pip3 install numpy --upgrade
```
To fix bug with NumPy dependencies on Raspberry Pi install libatlas source:
```
  sudo apt-get install libatlas-base-dev
```
Install dependencies for python sounddevice library:
```
  sudo apt install libportaudio2
```
Install gpac for the video convertion tool MP4Box:
```
  sudo apt install gpac
```
Install pydub python library for mp3 support:
```
  pip3 install pydub
```

Install Soundcard and Make Default

Set external soundcard as default how-to
When hotplugged, the sound card may not be activated. If true, reboot.

To see if the sound card was registered, run

  aplay -l

Produces output similar to

  **** List of PLAYBACK Hardware Devices ****
  card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]
    Subdevices: 4/4
    Subdevice #0: subdevice #0
    Subdevice #1: subdevice #1
    Subdevice #2: subdevice #2
    Subdevice #3: subdevice #3
  card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]
    Subdevices: 4/4
    Subdevice #0: subdevice #0
    Subdevice #1: subdevice #1
    Subdevice #2: subdevice #2
    Subdevice #3: subdevice #3
  card 2: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
    Subdevices: 1/1
    Subdevice #0: subdevice #0

card 2 is the usb sound card.

Edit the file /usr/share/alsa/alsa.conf:

Change the following lines (change the 0 to 2)
```
  defaults.ctl.card 2
  defaults.pcm.card 2
```
Test the speakers:
```
  speaker-test -c2
```
Should play white noise on the left and right channel.

Test the mic:

  arecord -d 10 -f cd -t wav test.wav
  aplay test.wav

To set gain levels etc. run:
```
  alsamixer
```

Set Up Camera

Plug in camera with ribbon cable (requires reboot)
Test camera (with screen plugged in):
```
  raspistill -t 1 -o test.jpg
```
Download test.jpg using sftp.

Set Up OnOff Shim:

Use the one-line installer:

  curl https://get.pimoroni.com/onoffshim | bash

Python Development on Raspi (pizzabox-main)

clone github repository https://git.theater.digital/johannes.payr/pizzabox-main.git

(For now) Use Pycharm. Set up remote python interpreter on raspberry pi:

  SSH Server: 10.10.0.23
  User Name:  pi
  Path:       /usr/bin/python3

install missing packages: 'click', 'sounddevice', 'soundfile', 'scipy'

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