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ID Inline

This guide provides detailed information about working with ID Inline instruments using the Elements Hub API.

If you do not want to use the REST API directly, consider generating the SDK library. See Client Code Generation

Device Workflow

The typical workflow for using an ID Inline device follows these steps:

Initialize lifecycle services
Start a scan with deviceClass: id-inline (or id-inline-mock for testing — see Mock Devices)
Monitor available devices
Connect to the device using the discovered identifier
Stop the scan
Calibrate / tare (measurementKey: tare)
Measure (measurementKey: measure)
Disconnect
Shut down lifecycle services

Complete Workflow Example

Step 1: Lifecycle Initialize

Before any device operations, initialize the Elements Hub services:

POST /v1/lifecycle/initialize
Content-Type: application/json

{
  "dataDirectory": "C:\\ProgramData\\ElementsHub\\Data",
  "logDirectory": "C:\\ProgramData\\ElementsHub\\Logs"
}

Step 2: Scan for ID Inline Devices

Start scanning for available ID Inline devices:

POST /v1/device-scans
Content-Type: application/json

{
  "deviceClass": "id-inline"
}

Response:

{
  "identifier": "abc123def",
  "scanFilter": {
    "deviceClass": "id-inline",
    "serialNumberFilter": null,
    "ipAddressFilter": null
  },
  "status": "scanning",
  "foundDevices": []
}

Step 3: Get Available Devices

Retrieve the list of currently discovered devices:

GET /v1/available-devices
Accept: application/json

The endpoint returns every device discovered by any active scan; there is no filter parameter. Filter client-side on deviceClass if you need to.

Response:

[
  {
    "discovered": "2042-11-07T12:22:14.9762102+00:00",
    "identifier": "abc123def",
    "deviceClass": "id-inline",
    "serialNumber": "12345",
    "serialNumbers": [
      "12345"
    ],
    "hardwareVersion": "…",
    "firmwareVersion": "…",
    "softwareVersion": "…",
    "componentVersions": []
  }
]

Step 4: Connect to Device

Connect to a specific ID Inline device using its identifier:

POST /v1/devices
Content-Type: application/json

{
  "deviceIdentifier": "abc123def",
  "parameters": [
    {
      "key": "flipX",
      "value": false
    },
    {
      "key": "flipY",
      "value": false
    }
  ]
}

Connection Parameters:

Parameter	Type	Description	Default
`flipX`	Boolean	Flip image horizontally	`false`
`flipY`	Boolean	Flip image vertically	`false`

Response:

{
  "connectTime": "2042-11-07T12:25:45Z",
  "identifier": "abc123def",
  "deviceClass": "id-inline",
  "serialNumber": "12345",
  "serialNumbers": ["12345"],
  "hardwareVersion": "…",
  "firmwareVersion": "…",
  "softwareVersion": "…",
  "componentVersions": []
}

Step 5: Stop Scan

Once connected, stop the device scan to free up resources. Use the scan identifier (returned by POST /v1/device-scans in Step 2), not the device identifier:

DELETE /v1/device-scans/<scanId>

The foundDevices array in the scan response contains the identifiers of every device discovered during the scan, not their serial numbers.

Step 6: Calibrate Device (Tare)

Before taking measurements, calibrate the device using the "tare" measurement trigger. This establishes a baseline reference for subsequent measurements:

The tare functionality will be moved to the calibrations endpoint in a future release.

POST /v1/devices/idInline-ABC12345/measurement-triggers
Content-Type: application/json

{
  "measurementKey": "tare",
  "containerFormat": "raeJson"
}

Step 7: Take Measurements

Execute measurement operations using the "measure" trigger:

POST /v1/devices/abc123def/measurement-triggers
Content-Type: application/json

{
  "measurementKey": "measure",
  "containerFormat": "raeBinary",
  "parameters": [
    {
      "key": "align",
      "value": true
    },
    {
      "key": "expose",
      "value": true
    },
    {
      "key": "includeAttachments",
      "value": true
    }
  ]
}

The two container formats raeBinary and raeJson are available.

Measurement Parameters:

Parameter	Type	Description	Default
`align`	Boolean	Perform automatic alignment before measurement	`true`
`expose`	Boolean	Perform automatic exposure adjustment before measurement	`true`
`includeAttachments`	Boolean	Include image data in the measurement result	`true`

Step 8: Disconnect from Device

When finished with measurements, disconnect from the device:

DELETE /v1/devices/abc123def

Step 9: Lifecycle Shutdown

When shutting down your application, properly shutdown the internal Elements Hub services:

POST /v1/lifecycle/shutdown

Image Acquisition

Retrieve images from the ID Inline device:

GET /v1/devices/abc123def/images/camera
Accept: image/png