# BluetoothGattValueEvent

`import { BluetoothGattValueEvent } from "destack:device/binding";`

Bluetooth GATT value event.

```ds title="BluetoothGattValueEvent"
export struct BluetoothGattValueEvent {
    timestampNs: uint64;
    sequence: uint64;
    characteristicId: string;
    bytes: uint64;
}
```

[language/library/src/device/binding/bluetooth.ds:396:405](https://github.com/destack-sh/destack/blob/main/language/library/src/device/binding/bluetooth.ds#L396-L405)

## Members

### `timestampNs: uint64`

Event timestamp in nanoseconds.

### `sequence: uint64`

Monotonic sequence number for this subscription.

### `characteristicId: string`

Characteristic identifier.

### `bytes: uint64`

Value bytes written.