---
title: "polling(systemCode:requestCode:timeSlot:completionHandler:)"
framework: corenfc
role: symbol
role_heading: Instance Method
path: "corenfc/nfcfelicatag/polling(systemcode:requestcode:timeslot:completionhandler:)"
---

# polling(systemCode:requestCode:timeSlot:completionHandler:)

Sends the Polling command as defined by FeliCa card specification to the tag.

## Declaration

```swift
func polling(systemCode: Data, requestCode: NFCFeliCaPollingRequestCode, timeSlot: NFCFeliCaPollingTimeSlot, completionHandler: @escaping @Sendable (Data, Data, (any Error)?) -> Void)
```

```swift
func polling(systemCode: Data, requestCode: NFCFeliCaPollingRequestCode, timeSlot: NFCFeliCaPollingTimeSlot) async throws -> (Data, Data)
```

## See Also

### Polling

- [PollingRequestCode](corenfc/pollingrequestcode.md)
- [PollingTimeSlot](corenfc/pollingtimeslot.md)