This is the information for installing, starting and maintaining the lifi table software

The table is an http server listening on port 3000. It is designed to recieve an array of image data from the client an update the table.

Avaliable endpoints are

• / - access retrives the client
• /stop - stop the animation and clears the LED buffer
• /init - restarts the LEDS

The image data is send via a websocket the connection to which can be established at /render

The server is a node.js server that listens on port 3000.

The server process is managed by pm2

The source for the server is in /server

The client is single page web application that renders the vsualisation using webgl.

It provides some basic parameters to control the table animation

source can be found in /src

It is designed to run on chrome

The client is compiled by webpack and put into /dist where the server actually serves the page from

The table server is set up to run node.js 9 on a Raspberry pi 3 Model B running Raspbian Stretch Lite

To set up on a new sd card run the following

  sudo apt-get update
  sudo apt-get upgrade
  curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
  sudo apt-get install -y nodejs
  npm install -g pm2
  sudo mkdir /var/www
  sudo chown pi /var/www
  sudo chmod 711 /var/www
  pm2 startup

follow the instructions from pm2 startup

Next on your development machine build the app by running

npm run build

Then copy /server, package.json, package-lock.json and /dist to /var/www on the server.

On the server install

  cd /var/www
  npm install

Its now ready to run

 sudo pm2 start /var/www/server/index.js
 sudo pm2 save 

Now the server will be avaliable and will start with server reboot

It may be usful to run the table server as a wireless access point so you can connect to it

We followed [this guide to set it up]https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md