---
title: ObjectEvent
slug: jetstream-v3/objectevent
docTags: 
createdAt: 2024-01-23T15:44:30.747Z
---

## About

ObjectEvent reports the EPCs of all the RFID tags that were read by an RFID device at a given point in time.

Only [Handheld](docId\:mwq_uCnvczJ5Cgj-uPuje) devices will include the Alias or Credential(s) parameters in their object events.

## Fields

| **Property**                                         | **Details**                                                                                                                                                                                                                                        |
| ---------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Type**<br />:::BlockQuote
string
:::               | The type of Jetstream event.                                                                                                                                                                                                                       |
| **EventId**<br />:::BlockQuote
string&#xA;Unique
::: | The ID assigned to the event.                                                                                                                                                                                                                      |
| **EventTime**<br />:::BlockQuote
string
:::          | The time that the event occurred.<br />The value is expressed in UTC.<br />This value is expressed in the following format: yyyy-MM-ddTHH\:mm\:ssZ                                                                                                 |
| **Version**<br />:::BlockQuote
int
:::               | The Jetstream version of the event.                                                                                                                                                                                                                |
| **Device**<br />:::BlockQuote
string
:::             | The name of the device.                                                                                                                                                                                                                            |
| **ReceivedTime**<br />:::BlockQuote
string
:::       | The time that the event was received from the device.<br />The value is expressed in UTC.<br />This value is expressed in the following format: yyyy-MM-ddTHH\:mm\:ssZ                                                                             |
| **Observe**<br />:::BlockQuote
array(string)
:::     | The EPC tag numbers observed by the device.                                                                                                                                                                                                        |
| **Alias**<br />:::BlockQuote
string
:::              | The alias used by the device.<br />This property is only present when Version has a value of 3+.<br />If this property is present, its value is optional. If the value is not defined, it defaults to an empty string.                             |
| **Credential(s)**<br />:::BlockQuote
string
:::      | The credentials used by the user who triggered the event.<br />This property is only present when Version has a value of 3+.<br />If this property is present, its value is optional. If the value is not defined, it defaults to an empty string. |

## Examples

### Published ObjectEvent from All Device Types other than Handhelds

:::BlockQuote
\{
&#x20;   "Observe": \[
&#x20;       "E2009061540301250180F17E",
&#x20;       "E2009061540301230180F176",
&#x20;       "E2009061548301420180F1C2",
&#x20;       "E2009061540301440180F1CA",
&#x20;       "AD0052210000000000014469",
&#x20;       "E2009061540301460180F1D2"
&#x20;   ],
&#x20;   "Device": "MyDeviceName",
&#x20;   "ReceivedTime": "2018-05-19T06:15:00Z",
&#x20;   "Type": "ObjectEvent",
&#x20;   "EventId": "5b9085e0-e83b-4b74-a937-43df932508c8",
&#x20;   "EventTime": "2018-05-19T06:14:56Z",
&#x20;   "Version":2
}
:::

### Published ObjectEvent from a Handheld

:::BlockQuote
\{
&#x9;"Type": "ObjectEvent",
&#x9;"Alias": "MyAliasName",
&#x9;"Device": "MyDeviceName",
&#x9;"EventId": "ac1d6984-e2a4-4028-9d2d-1e007f6fc18c",
&#x9;"Observe": \[
&#x9;	"E2009061540301250180F17E",
&#x9;	"E2009061540301230180F176",
&#x9;	"E2009061548301420180F1C2",
&#x9;	"E2009061540301440180F1CA",
&#x9;	"AD0052210000000000014469",
&#x9;	"E2009061540301460180F1D2",
&#x9;],
&#x9;"Version": 3,
&#x9;"EventTime": "2020-11-25T20:20:32Z",
&#x9;"Credential": null,
&#x9;"Credentials": "",
&#x9;"ReceivedTime": "2020-11-25T20:20:34Z"
}

:::

## Version Changes

- Addition of the Alias property
- Addition of the Credentials property
- Addition of the Version property