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  "framework" : "CoreNFC",
  "identifier" : "/documentation/CoreNFC/NFCFeliCaTag/polling(systemCode:requestCode:timeSlot:completionHandler:)",
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# polling(systemCode:requestCode:timeSlot:completionHandler:)

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

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

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

---

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