tk4100-rfid-reader
==================

Read cards from a USB TK4100 / EM4100 card reader

Only tested on Raspberry PI but should work on any Linux OS. I personally used
this reader from Amazon.

- SainSmart RFID Mifare IC Card Reader USB for TK4100/ EM4100/ EM4200 (13.56M 1443A (2H+4H))

Usage
-----

$3

First, install the module

npm install tk4100-rfid-reader

Then use it like:

`` js
var RFIDReader = require('tk4100-rfid-reader');

var rr = new RFIDReader({
device: '/dev/input/event0', // input device to read
maxLength: 32 // max key length, defaults to 32, set to 0 to disable
});

rr.on('tag', function (tag) {
// tag as a hex string
// tag => "abcd1234"
});

rr.on('error', function (err) {
// error was encountered while reading
// currently this is only fired if the key is greater than maxLength
});
`

$3

The tk4100-rfid-reader command will listen for new tags being read by the
reader, and then fork an external command for each new tag ran in order.

Install the tool globally

npm install -g tk4100-rfid-reader

Then create a JSON config file

` json
{
"device": "/dev/input/event0",
"exec": {
"file": "./new-tag",
"options": {
"timeout": 30000,
"uid": 1000,
"gid": 1000
}
},
"log": {
"level": "debug",
"name": "rfid-reader"
}
}
`

- device: the device passed to the RFIDReader constructor to listen for events
- exec.file: command to execute for each new tag detected
- exec.options: exec options - passed directly to child_process.execFile
- log: passed directly to the bunyan constructor for logging

And finally create the ./new-tag script - this will be executed whenever a
new tag is read.

` bash
#!/usr/bin/env bash
tag=$RFID_TAG_ID
echo "running command as $(whoami) for tag $tag"
`

This program will be executed with the environmental variable RFID_TAG_ID set.

Example

`


tk4100-rfid-reader config.json

``

License
-------

MIT License