In supply chain management, WPAN devices can be embedded in products or in packaging and can communicate with each other in warehouses and delivery vehicles. As items are added to or removed from a stack of shelves in a warehouse, the clusters reconfigure dynamically, and information about the new products is distributed to the upload device. Each stack of shelves in a warehouse needs an upload device connected to the supply chain management system to forward information it receives from all the other devices on the products stored on those shelves.