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So this collection is a **payload reference library**: every request below stores the exact JSON `event` payload from the documentation in its Body tab, plus the documented success/error/streaming responses in its Description tab. The request method/URL are placeholders only — do **not** hit Send on them as HTTP calls.\n\n**Recommended workflow:**\n1. Import this collection AND the companion environment (`DERAS Protocol - Environment.postman_environment.json`).\n2. Select the DERAS environment, then edit `deras_box_ip` to match your actual DERAS Box IP.\n3. In Postman click **New → WebSocket**, set the URL to `{{ws_url}}`, and click **Connect**.\n4. Open any request in this collection, copy the JSON from its **Body** tab, paste it into the WebSocket message composer, and click **Send**.\n5. Responses (including streamed/pushed events like `scan-rfid-result`) will appear in the WebSocket message log — compare them against the *Success/Error/Streaming Response* documented on each request.\n\n### Standard payload fields\n| Field | Description |\n|---|---|\n| `tid` | Tag ID – unique identifier of the RFID chip |\n| `epc` | Electronic Product Code – usually matches/relates to the TID |\n| `status` | Integer flag: 1 = active, 0 = inactive |\n| `category` | 0 = item/good, 1 = person, other integers = custom use |\n| `description` | Human-readable label for the tag |\n| `flag_alarm` | 1 = alarm triggers on tag detection, 0 = alarm disabled |\n| `no_sku` | Client-defined master key / SKU reference. **Cannot be changed once inserted.** |\n| `remark` | Used by report-logs (e.g. INBOUND, OUTBOUND) 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