RFID gate system: every portal, door and exit on one live map

An RFID gate or portal is a fixed reader with one or more antennas framing a passage: a dock door, a cage gate, a store exit, a corridor. Every tag that passes through the read field is reported with the gate, the antenna and the time. With two antenna zones, middleware can infer direction from the order in which the zones see the tag.

Gates answer “what passed here, when, and which way?”. They do not say where an item is between gates, and they need tuning: read fields spill into neighbouring doors, tags shielded by bodies, metal or liquids get missed, and items that linger near a gate produce repeated reads. That is why the map shows gate health and read counts, not just reads.

In Spatial Map each gate is a marker or zone on the 3D floor plan, bound to a table of reads or gate states from your middleware. Style rules show which gates are reading, quiet or offline; the detail drawer lists recent reads. Items appear at the last gate that saw them, and the History player draws a read trail from gate to gate.

Gates suit choke points — doors and exits that everything must pass. Handhelds suit counts and searches. Overhead fixed readers suit continuous coverage of a room or zone. Most sites combine them; RFID handheld vs fixed reader vs gate explains the trade-offs, and RFID hardware covers the readers we work with (e.g. from Zebra, Chainway, SATO or Sanray — trademarks of their owners).

Spatial Map has no reader drivers and does not sound alarms; your gate system and middleware keep doing that. If you need middleware to filter, de-duplicate and add direction to raw gate reads, that is custom development.