如何NFC读取器（ACR122）检测到我的电话？ [英] how does nfc reader(acr122) detect my phone?
问题描述
我买ACR122U SDK具有ACR122读写器，CD和卡片，我尝试对其进行测试。读者从红色改变它的LED灯为绿色检测卡，但是当我把我的手机（NFC已开启）靠近读卡器，有什么情况发生。
I buy ACR122U SDK that has a acr122 reader,cd and cards and I try to test it. the reader detect the cards by changing its LED light from red to green but when I take my phone (NFC is turned on) near the reader,there is nothing happen.
我如何使读者发现我的手机？我必须安装java applet的卡到我手机让我的手机充当非接触式卡？
How do I make the reader detect my phone? I have to install java card applet into my phone for letting my phone act as a contactless card?
推荐答案
使用ACR122U NFC阅读器，你有三种选择：
Using the ACR122U NFC reader you have three options:
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在ACR122U对等网络模式：在对等网络模式，您可以使用Android的内置功能束的Android设备进行通信。在读者方面，你将需要实现SNEP服务（和潜在的LLCP + NFCIP-1协议栈）。你可以找到例子，比如，用 ISMB-SNEP ， NFC工具和 nfcpy 。
在卡模拟模式ACR122U：在卡仿真模式ACR122U可以用来模拟可以通过Android设备，就像任何其他NFC标签/接触式智能卡检测到标签/接触式智能卡。你可以找到例子，比如，用 libnfc 。
ACR122U in card emulation mode: In card emulation mode the ACR122U can be used to emulate a tag/contactless smartcard that can be detected by an Android device just like any other NFC tag/contactless smartcard. You can find examples, for instance, with libnfc.
在ACR122U读/写器模式：在读/写器模式下，ACR122U可以与接触式智能卡通信。该进入什么的 takumar 的已经张贴在他的答案的方向。当你被套牢了安全元件的要求（通常是困难的，因为得不到，甚至缺乏SE的），最近的Android版本（具体的CyanogenMod 9.1+或Android 4.4或以上版本），你必须使用的选项主机卡模拟（HCE）模式。见href=\"http://developer.android.com/guide/topics/connectivity/nfc/hce.html\" rel=\"nofollow\"> Android文档了解如何在Android 4.4及更高版本的工作
ACR122U in reader/writer mode: In reader/writer mode, the ACR122U can communicate with contactless smartcards. This goes into the direction of what takumar already posted in his answer. While you were stuck with the requirement of a secure element (which is typically difficult due to lack of access or even lack of an SE), with recent Android versions (specifically CyanogenMod 9.1+ or Android 4.4+), you have the option to use host card emulation (HCE) mode. See the Android documentation for how that works on Android 4.4 and later.
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