nodeacr122u

Lightweight LibNFC glue for Node.js (intended for reading Mifare Classic RFIDs via ACR122U)

$3

``javascript
#!/usr/bin/env node

var Acr122U = require('nodeacr122u');

var dev = Acr122U.create();
dev.open( 'acr122_usb:', function(obj, err) {
if( err ) {
console.log("Acr122U: Failed to open device: "+err);
return false;
}
dev['data'] = function(data) {
console.log("Acr122U event: "+JSON.stringify(data, null, 2));
};
});

// Hack to prevent Node.js from exiting, sorry.
var http = require('http');
var httpServer = http.createServer(function(){});
httpServer.listen(8084);
console.log("Listening for keyboard input...");
`

Methods

Factory

$3


Returns an initialised Acr122u object.

* Returns: An initialised Acr122u object.

---

Acr122u object

$3

Open an Acr122u device, associate it to this object, and fire the provided callback upon completion.

The parameters passed to the provided callback function are Acr122uObject which is a reference to the Acr122u object, and error which will be an error string in the case of an error, or undefined on success.

* Returns: A reference to itself.

$3

A virtual method of the Acr122uObject. Reimplement it to handle Acr122uEvents. It can be ignored, but if you ignore it, you might as well not use this module at all.

$3

A virtual method of the Acr122uObject. Reimplement it to react to the device being closed. Otherwise it can be ignored.`