# NFC

## Overview

This chapter explains how to operate the NFC reader functions using the `AsReaderNFCDevice` class.  
It covers connecting to the device, starting and stopping scanning, and receiving scanned data.

## Supported Devices

`ASR-0240D`

## Classes and Protocols Used

```{list-table} List of Classes and Protocols
:header-rows: 1
:widths: 25 15 60

* - Name
  - Type
  - Description
* - [`AsReaderNFCDevice`](./9_AsReaderNFCDevice.md)
  - Class
  - Main class for controlling the NFC reader
* - [`AsReaderNFCDeviceDelegate`](./6_AsReaderNFCProtocol.md)
  - Protocol
  - Used for receiving scan results and other events
```

## Initialization and Connection

```objectivec
AsReaderNFCDevice* device = [[AsReaderNFCDevice alloc] init];
device.delegateNFC = self;
```

- `delegateNFC`: Set this to receive NFC read events.

## Start and Stop Scanning

```objectivec
[device startScan];   // Start scanning
[device stopScan];    // Stop scanning
```

## Receiving Scan Results

```objectivec
- (void)receivedScanData:(NSData *)readData {
    // readData: NFC data
}
```

※ Implemented as a method of the `AsReaderNFCDeviceDelegate` protocol.

```{toctree}
:maxdepth: 1
:hidden:

9_AsReaderNFCDevice.md
Delegate <6_AsReaderNFCProtocol.md>
```