emonPi service-runner now uses redis (core, wifi, sync & postprocess module updates required)

Linked post Development Roadmap 2019 - Robust Backup Process - #33 by borpin

@Greebo @pb66, digging around in the Redis docs, could you use the SCAN command with a pattern match so it will pick up any prefix? I’m not clear on what the SCAN command returns or how to use it so I am stuck at this point.