Fig. 4From: Proposal for a layer-based IoT construction method and its implementation and evaluation on a rolling stand-up walkerMeasurement system based on the IMSM that was implemented on the rolling stand-up walker—each sensor system was modularized to allow access using the server in the Layer 3 using UDP over Wi-Fi, user rehabilitation CSV data files were transferred in the Layer 5 to the server using FTPBack to article page