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The group is the 3rd level of the hierarchy. Groups are used to split projects onto small partsmeans of adjacency aggregation(adjoining spots or very close proximity). For example, if there is a need to analyse parking occupancy data of multilevel car parking by levels, you can register a group for each level and keep devices in them. Also, Nwave use groups for algorithms of calculation of realtime availability of parking bays. Groups also can be used for setting up HTTP and RabbitMQ routes.
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