Forked to try to make it work in 2021, after digging up some old work from 2013, following these instructions (french) at the time.
Can't get sConnect to work, though.
Check atr/lib/calypso/locationid.pl for more station ids for navigo. The list in there was compiled from http://aurelienb.pagesperso-orange.fr/HTML/transports/obli_metro.htm