How to set the default work role for a device/sensor/user?

Click the “AOS” menu button, then expand the “AOS Setting” tab and select “Members” menu,
Find a device you want to edit,
Click the "Initial node" field to set up the initial node of the selected device,
Now choose the sub-role we want to be a default for the device,
Click "SAVE".

Your members are filtered into Devices, Sensors, and Users. The process of setup is the same.