node-red-contrib-acr122u_nfc/acr122u.js

NFC acr122u card read node

const nfc = require('nfc-pcsc');

module.exports = function(RED) {
    function NFCReaderNode_acr122u(config) {
        RED.nodes.createNode(this, config);
        var node = this;

        // Create a new NFC reader instance
        const reader = new nfc.NFC();

        reader.on('reader', function(reader) {
            node.status({ fill: "green", shape: "dot", text: "Reader detected" });
            console.log(`Reader detected: ${reader.name}`);

            reader.on('card', function(card) {
                node.status({ fill: "green", shape: "dot", text: "Card detected" });

                // Send the card UID to the Node-RED flow
                node.send({ payload: card.uid });

                console.log(`Card UID: ${card.uid}`);
            });

            reader.on('card.off', function(card) {
                console.log(`Card removed: `, card);
                node.status({ fill: "red", shape: "ring", text: "Card removed" });
                node.send({ payload: "card removed" });
			
			});

            reader.on('error', function(err) {
                console.error('Error:', err);
            });

            reader.on('end', function() {
                console.log('Reader disconnected');
                node.status({ fill: "red", shape: "ring", text: "Reader disconnected" });
            });
        });

        reader.on('error', function(err) {
            console.error('No reader found', err);
            node.status({ fill: "red", shape: "ring", text: "No reader found" });
        });
    }

    // Register the node in Node-RED
    RED.nodes.registerType("acr122u", NFCReaderNode_acr122u);
};