song-and-spell 0.11.0

A configurable, mutable toddler radio that encourages spelling

song-and-spell

tl;dr

A key-logger that triggers playing an audio track when a sequence of keys are pressed and a web-app to configure the words and songs.

Requires VLC to be installed on the host and an X server to be running.

install on raspberry-pi 400

With a screen attached

We need to force the X-server to start when the HDMI cable is not plugged in (for the pynput key-logger). The easiest way I found is to run sudo raspi-config, then select Advanced, Screen and pick any screen resolution except for the default one.

Pair, trust and connect your bluetooth speaker. There are many guides for this, here is one.

To install the app, add a systemd-service so that it starts on start-up and make some other changes so that it can headlessly connect to a bluetooth speaker, download and install the install script on your raspberry-pi 400. In a terminal:

Note: this script will only work on a raspberry-pi (or any debian-derived OS with a bluetooth transciever and a normal user pi that is in the audio and bluetooth groups).

curl -L https://github.com/cboddy/song-and-spell/blob/master/scripts/install_rpi.sh | sudo bash 

Note: this will restart your raspberry-pi. Turn on your speaker and it should automatically connect and go to the web-ui running on port 5000.

todo

• key-logger
• youtube-dl the link and store as mp3 locally.
• flask-web-app
  • list of words and files/links
  • mute
  • upload file
    • remove word/file
  • ~~form add word/link ~~
• systemd service to:
  • run on start-up
  • restart on error
• delete bug
• vlc not terminating when song finishes
• space to stop
• file-upload
• new systemd-service
• install script
• volume-normalisation?

notes

• the pynput library requires an X server to be running. Set default resolution in raspi-config (anything other than default) to force the X server to start.

setup bluetooth

# install required packages
sudo apt install bluealsa pulseaudio* bluez-tools vlc

# set display to force X-server to start
TODO
raspi-config nonint ???

# pair bluetooth
TODO

# update bluetoothd service to start  with a2dp plugin
sudo sed -i 's#ExecStart=/usr/lib/bluetooth/bluetoothd#& --plugin=a2dp#' /lib/systemd/system/bluetooth.service
# reload/restart bluetooth service
systemctl daemon-reload
systemctl restart bluetooth

# switch to the bluetooth speaker as the default speaker when it connects
echo "load-module module-switch-on-connect" >> /etc/pulse/default.pa

development

python3 -m venv
. bin/venv/activate
python3 setup.py develop