---
title: CardSession.APDU
framework: corenfc
role: symbol
role_heading: Class
path: corenfc/cardsession/apdu
---

# CardSession.APDU

An Application Programming Data Unit (APDU) received from the NFC card reader.

## Declaration

```swift
final class APDU
```

## Topics

### Receiving data

- [payload](corenfc/cardsession/apdu/payload.md)

### Communicating with the card session

- [respond(response:)](corenfc/cardsession/apdu/respond(response:).md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Events

- [CardSession.Event.sessionStarted](corenfc/cardsession/event/sessionstarted.md)
- [CardSession.Event.readerDetected](corenfc/cardsession/event/readerdetected.md)
- [CardSession.Event.received(_:)](corenfc/cardsession/event/received(_:).md)
- [CardSession.Event.readerDeselected](corenfc/cardsession/event/readerdeselected.md)
- [CardSession.Event.sessionInvalidated(reason:)](corenfc/cardsession/event/sessioninvalidated(reason:).md)