Question

I would like to read an NFC tag’s UID, tags don’t have any ndef message or anything (empty), just UID. It’s easy to do on Android, but Phonegap development is way faster so I would like to know if it’s possible to get it working on Phonegap, probably using the phonegap-nfc plugin.

Answer 1

The phonagap-nfc plugin will allow you to read the tag's UID.

nfc.addTagDiscoveredListener() is good if you need the tag id. As of phonegap-nfc-0.4.0 the tag id is also included with the NDEF listeners when it is available.

You can convert the id to a hex string for display with nfc.bytesToHexString(tag.id)

function ready() {

    function onNfc(nfcEvent) {

        var tag = nfcEvent.tag;
        var tagId = nfc.bytesToHexString(tag.id);
        alert(tagId);

    }

    function win() {
        console.log("Listening for NFC Tags");
    }

    function fail(error) {
        alert("Error adding NFC listener");
    }


    nfc.addTagDiscoveredListener(onNfc, win, fail);
}

function init() {
    document.addEventListener('deviceready', ready, false);
}