Library to use Nordic ID reader with nur protocol. (only a few command implemented and some of them partially)

The program is partially tested with Nordic ID Sampo This very early library so not use it, except checking commands structure

Original documentation of the protocol: https://github.com/NordicID/nur_sdk/tree/master/Docs

Change ip.of.the.reader to the actual ip of the reader

Sample program:

var net = require('net'),
    Nur = require('rfid_nur'),
    nur = new Nur();

var processTag = function(data){
        if (data.status === 0) {
            console.log("Tag found, EPC: " + data.EPC);
            var newEPC = '00000025',
                password = 0x00000000,
                bank = 1 //EPC bank
            ;
            console.log("Changing EPC to " + newEPC);
            // dont know why need '1000' prefix and seems to not update how much lenght will be used
            client.write(nur.cmd.writeTag(procesWrite, 0x02, password, bank, 32, data.EPC.length * 4, Buffer.from(data.EPC, 'hex'), bank, 1, Buffer.from('1000' + newEPC, 'hex') ));
        } else {
            console.log("No tag found: 0x" + data.status.toString(16));
        }
    },
    procesWrite = function(data){
        if (data.status === 0){
            console.log("Succesfull write, " + data.error + " word written.");
        } else {
            console.log("Failed to write: " + data.status);
        }
    };

var client = new net.Socket();
client.connect(4333, 'ip.of.the.reader', function() {
    console.log('Connected');
    client.write(nur.cmd.ping(console.log));
    // client.write(nur.cmd.getReaderInformation(console.log));
    client.write(nur.cmd.scanSingleTag(processTag, 1000));
    // console.log("write");
    //console.log(nur.cmd.writeTag(console.log, 0x02, 0x00000000, 1, 32, 96, Buffer.from('2000020101000000000006DB', 'hex'), 3, 0, Buffer.from('0101020203030404','hex') ));
    //controlFlags, password, bank, bitAddress, maskBitLength, mask, bankToWrite, bitAddressWrite, data
    //client.write(nur.cmd.writeTag(console.log, 0x02, 0x00000000, 1, 32, 32, Buffer.from('00080025', 'hex'), 1, 1, Buffer.from('100000000025','hex') ));

});


client.on('data', function(data) {
    nur.parseStream(data);
});

client.on('close', function() {
    console.log('Connection closed');
});

client.on("error", function(err) {
    console.log("Caught socket error: " + err.message);
});

// nur.on('answer', console.log);
// nur.on('unsolicited', console.log);
nur.on('inventory', console.log);

nur.on('unsolicited', function(data){
    // console.log(nur.parseAnswer(data));
    if (data.readUInt8() === 0x81){
        client.write(nur.cmd.scanSingleTag(processTag, 1000));
    }
});

/*
nur.on('answer', function(data){
    console.log(nur.parseAnswer(data));
});*/