Variant

asBuffer() [Variant class]

Since 6.2.0:

// PROTOTYPE
Buffer& asBuffer();

Buffer overloads are used when publising binary data in a Variant. Binary data in a published event is converted to CBOR, then the cloud converts it into a hex-encoded string in the published JSON in the event log and in integrations. See Buffer for more information.

See value, as, and to for when to use the asXXX() vs. other accessors.