# Add Streaming Cluster Data

`stream_custom_cluster.lvclass:add data.vi` · Palette: [Stream](https://dev.nominal.io/ni-labview/ref/stream.md) · [Source](https://github.com/nominal-io/labview-client/blob/HEAD/lv_src/stream_custom_cluster/add%20data.vi)

![](https://dev.nominal.io/ni-labview/_images/ac43c44795cba966292feeaa23f0bf47_viicon.png)

Adds cluster data to the internal buffer for later transmission.  
**Data type must be identical to the Initialize function.**  
Fast, non-blocking operation for high-speed data collection.  
See `Streaming Cluster Data` example for useage notes.

![Connector pane of Add Streaming Cluster Data](https://dev.nominal.io/ni-labview/_images/ac43c44795cba966292feeaa23f0bf47_connpane.png)

## Inputs

**stream custom cluster in** required
:   `stream_custom_cluster.lvclass`

**Data Cluster** required
:   `Void`

**Time Stamp (now: system time)**
:   `Timestamp`

**error in**
:   `Error cluster`

## Outputs

**stream custom cluster out**
:   `stream_custom_cluster.lvclass`

**error out**
:   `Error cluster`