added an example for using with react-native-hce

examples/react-native-hce.js

@@ -0,0 +1,80 @@
+/** 
+ * this is a simple example on how to use this library with react-native-hce
+ * tested with an acr122
+ */
+
+const { NFC } = require('nfc-pcsc');
+
+// relay log messages to the console
+const logger = {
+  info: console.info,
+  debug: console.debug,
+  warn: console.warn,
+  error: console.error
+}
+
+const nfc = new NFC(logger);
+
+nfc.on('reader', async reader => {
+  console.log(`${reader.reader.name}  device attached`);
+
+  // reset reader.aid
+  delete reader.aid; 
+
+  // disable auto processing (not needed)
+  //reader.autoProcessing = true;
+
+  //this is a fixed value in react-native-hce (at least for now)
+  //it won't work with another aid
+  reader.aid = 'D2760000850101';
+
+  reader.on('card', async (card) => {
+    console.log(`${reader.reader.name}  card inserted`, card);
+
+    //it seems that the default data readed from simulated card is always empty
+    //const data = card.data.toString('utf8');
+    //console.log('data');
+
+    //get data length if you want to read exact byte length;
+    //packet = Buffer.from([0x00, 0xB0, 0x00, 0x00, 0x02]);
+
+    //..or read data (first 256 bytes)
+    const packet = Buffer.from([0x00, 0xB0, 0x00, 0x00, 0xff]);
+    console.log(packet);
+    try {
+      const response = await reader.transmit(packet, 255);
+      console.log(response);
+
+      //slice the response to get only the data without headers and response codes
+      const data = response.slice(9, response.length-2);
+      console.log(data.toString('utf8'))
+
+    } catch (e) {
+      console.log('ERROR');
+      console.log(e);
+    }
+
+  });
+
+  reader.on('status', status => {
+    console.log(status);
+  })
+
+  reader.on('card.off', card => {
+    console.log(`${reader.reader.name}  card removed`);
+  });
+
+  reader.on('error', err => {
+    console.log(`${reader.reader.name}  an error occurred`, err);
+    console.log(err);
+  });
+
+  reader.on('end', () => {
+    console.log(`${reader.reader.name}  device removed`);
+  });
+
+});
+
+nfc.on('error', err => {
+  console.log('an error occurred', err);
+});