I googled for "Unable to claim USB interface 0: could not claim interface 0: Operation not permitted" and found a 2013 threadd here saying permissions indeed. https://groups.google.com/forum/#!topic/weewx-user/mvV-0o9hLgI
(hint - try 'sudo' on a pi almost always, you are running as a non-privileged user by default on a pi) -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
