Occasionally more than one ProbeReading entry for the same date to be created.   Fixed by changing from using 'starts_with' query to range query covering the 24 hour period of interest.
Occasionally more than one ProbeReading entry for the same date to be
created.   Fixed by changing from using 'starts_with' query to range
query covering the 24 hour period of interest.

warnes/irrigatorpro,warnes/irrigatorpro,warnes/irrigatorpro,warnes/irrigatorpro