This requires a republisher which can be found in repub/. The republisher uses
vehicles.json to convert an MQTT topic name to atid for a "car name" which is shown
in the vehicle column. If tid isn't available, the last two characters of the
topic are used.
Reverse geocoding is done via Nominatim. In order to lower the load on Nominatim,
we lower the precision of the lat/lon coordinates to three digits (approximately
100m) and perform a lookup, caching that as we go. The "key" into the database
cache is the lat and the lon, e.g. 12.123,8.987.
Similarly, weather lookups are performed via OpenWeatherMAP, and these lookups are cached for an hour. This database should be removed periodically.
config.js describes the address and port number of the Websocket server, the
topic to which the app should subscribe (correlate this with tablerepub.py)
and whether or not to hide the topic column in the app.
It may well be possible to do all this browser-side in JavaScript, but it was much easier for me to collect the necessary data server-side and provide that to JS.