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node-red-nodes/hardware/scanBLE/101-scanBLE.js

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module.exports = function(RED) {
"use strict";
//import noble
var noble = require('noble');
// The main node definition - most things happen in here
function BleScan(n) {
// Create a RED node
RED.nodes.createNode(this,n);
var msg = {};
var ble_name;
var node = this;
//get name and uuid from user
this.ble_name = n.ble_name;
this.ble_uuid = n.ble_uuid;
this.on("input", function(msg) {
noble.startScanning();
});
noble.on('scanStart', function(msg) {
msg = {};
msg.topic = node.topic;
msg.payload = "Scanning initiated..." //debugging
//console.log('scanning initiated...');
node.send(msg);
});
noble.on('discover', function(peripheral) {
var msg = {};
msg.topic = node.topic;
msg.payload = "not found";
//check for the device name and the UUID (first one from the UUID list)
if (peripheral.advertisement.localName==node.ble_name && peripheral.advertisement.serviceUuids[0]==node.ble_uuid) {
msg.payload=peripheral.advertisement.localName;
noble.stopScanning();
}
node.send(msg);
});
this.on("close", function() {
try { noble.stopScanning(); }
catch (err) { console.log(err); }
});
}
// Register the node by name. This must be called before overriding any of the
// Node functions.
RED.nodes.registerType("scanBLE", BleScan);
}