This dataset supports the Poster entitled "A Generic Middleware for External Peripheral State Retention in Transiently-Powered Sensor Systems" accepted for publication in ENSsys 2017 Data Supporting Table: Table I. Time overhead caused by the middleware. Date of data collection: from July 2017 - August 2017 Information about geographic location of data collection: University of Southampton, U.K. Date that the file was created: September 2017