I cloned the Autodesk Data Visulization service, aps-iot-extensions-demo-master; I found the Node.js in VSCode showed that “the file extension loaded into the viewer is not supported, try a different file”. After follow previous simalar question I solved this issue by set const APS_MODEL_VIEW = ”, getDefaultGeometry() to “getDefaultGeometry(true)”. Another issue exist: I just replaced APS_CLIENT_ID, APS_CLIENT_SECRET, APS_MODEL_URN and APS_MODEL_VIEW; the URN and GUID are obtained through a Model Derivative API. The source Revit file was translated to .svf file. However, the heatmap is not visualized in the Web and there is no error exist in console. The sensor location (x,y,z) are all set to be included in the Room bounds. The Model Brower in Viewer can also see “Rooms” element. Interesting, the console will not show error about” sensor do not within the Room bounds” when I put them outside the room. May be the inter-connect for sensor and room is not right? Do I need to try .svf2? If anyone can help, I will be very grateful!