I am listening to John Robbie on 702. He is dubious about a 'story' that has supermarket trolleys with gps tech to guide you in-store.
Sounds like an application for 'Raspberry Pi'! My USB GPS works well on my Pi. Using 'gpsd' the daemon and gps client software is a piece of cake to implement.
The last weekends session had 'Troubleshooting' as its main item. Well attended the session went very quickly. I was amazed to find that I was closing up at 17:00!
We [the club] need to encourage the youngsters to visit the Raspberry Pi sessions. So next session, why not bring a youngster to the club?
Every 4th Saturday at the club house in Kroton street at 13:00.
John Brock ZS6WL