added an example for react-native-hce and acr122u

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(`${reader.reader.name} device attached`);
+
+ // reset reader.aid
+ delete reader.aid; 
+
+ // disable auto processing
+ reader.autoProcessing = true;
+
+ //this is a fixed value in react-native-hce (at least for now)
+ //it won't work with another aid
+ reader.aid = 'D2760000850101';
+
+ reader.on('card', async (card) => {
+ console.log(`${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);
+});