Human Interface Devices (HID) can be polled for data. An HID is a USB-connected peripheral device such as a scanner (generally for barcodes or QR codes).
In the context of LoopEdge, the following characteristics are relevant for this serial device:
Certain device drivers will not have a list of register names in the DeviceHub Add Tag form. These are Free Tag PLCs. For Free Tag requirements, see Troubleshoot Device Connectivity Status.