My local emonpi stopped working out of the blue the other day and I failed to get it going again (it would just hang on "booting, please wait… ").
So I flashed a new SD and then imported a backup from the old, not working, one. Everything looks fine now except there are large chunks of historical data missing, I assume the database had somehow got corrupted.
All the historic data is online at emoncms.org though. Is there a way to sync the two so the missing data is replaced on my local CMS?