App RFID LLRP Inventory - Configuration
This application service has the following custom configuration
AppCustom
This section contains the Aliases configuration map which maps reader/antenna combinations to meaningful location names.
The map is initially empty and is up to the deployment to populate it.
See Location Aliases for complete details
ApplicationSettings
This section contains the following settings:
| Name | Default Value | Description |
|---|---|---|
| DeviceServiceName | device-rfid-llrp | Name of the device service that manages the list LLRP Readers. Should never change. |
| AdjustLastReadOnByOrigin | true | If true, will override the tag read timestamps sent from the sensor with an adjusted one based on the UTC time the LLRP Device Service received the message from the device (aka Origin). Essentially all timestamps will be shifted by the difference in time from when the sensor says it was read versus when it was actually received. This option attempts to account for message latency and time drift between sensors by standardizing all timestamps. If false, timestamps will retain their original values sent from the sensor. |
| DepartedThresholdSeconds | 600 | How long in seconds a tag should not be read before it will generate a Departed event. |
| DepartedCheckIntervalSeconds | 30 | How often to run the background task that checks if a Tag needs to be marked Departed. Smaller intervals will cause more frequent checks and less variability at the expense of CPU utilization and lock contention. Larger intervals on the other hand may cause greater latency between when a tag passes the DepartedThresholdSeconds and when the Departed event is actually generated (waiting for the next check to occur). |
| AgeOutHours | 336 | How long in hours to keep Departed tags in our in-memory inventory before they are aged-out (purged). This is done for CPU and RAM conservation in deployments with a large turnover of unique tags. An aged-out tag will be purged from memory and if it is read again it will be treated as the first time seeing that tag. |
| MobilityProfileThreshold | 6.0 | RSSI threshold that must be exceeded for the tag to move from the previous sensor. Units are dBm |
| MobilityProfileHoldoffMillis | 500.0 | Amount of time in which the offset used is equal to the threshold, effectively the slope is not used. Units are milliseconds |
| MobilityProfileSlope | -0.008 | Used to determine the offset applied to older RSSI values (aka rate of decay). Units are dBm per millisecond |