Question

我正在尝试开发一款用于测试Estimote信标的小型应用。我找到了与我的iPad完美运行的代码片段：显示房间中每个灯塔的uuid，major，minor和Proximity值。但是＆＃39; beacon.distance＆＃39;命令返回＆＃34; undefined＆＃34;我的应用中的价值。有人可以告诉我为什么吗？

为了您的信息，我使用的是Jquery和PhoneGap Build平台。

提前THX！干杯

var app = (function()
{

var app = {};

var regions = [ {uuid:'B9407F30-F5F8-466E-AFF9-25556B57FE6D'} ];

var beacons = {};

var updateTimer = null;

app.initialize = function()
{
    document.addEventListener('deviceready', onDeviceReady, false);
};

function onDeviceReady()
{

    window.locationManager = cordova.plugins.locationManager;

    startScan();

    updateTimer = setInterval(displayBeaconList, 500);
}

function startScan()
{

    var delegate = new locationManager.Delegate();

    delegate.didRangeBeaconsInRegion = function(pluginResult)
    {

        for (var i in pluginResult.beacons)
        {
            var beacon = pluginResult.beacons[i];
            beacon.timeStamp = Date.now();
            var key = beacon.uuid + ':' + beacon.major + ':' + beacon.minor;
            beacons[key] = beacon;
        }
    };

    delegate.didStartMonitoringForRegion = function(pluginResult)
    {
        //console.log('didStartMonitoringForRegion:' + JSON.stringify(pluginResult))
    };

    delegate.didDetermineStateForRegion = function(pluginResult)
    {
        //console.log('didDetermineStateForRegion: ' + JSON.stringify(pluginResult))
    };

    locationManager.setDelegate(delegate);

    locationManager.requestAlwaysAuthorization();

    for (var i in regions)
    {
        var beaconRegion = new locationManager.BeaconRegion(
            i + 1,
            regions[i].uuid);

        // Start ranging.
        locationManager.startRangingBeaconsInRegion(beaconRegion)
            .fail(console.error)
            .done();

        // Start monitoring.
        // (Not used in this example, included as a reference.)
        locationManager.startMonitoringForRegion(beaconRegion)
            .fail(console.error)
            .done();
    }
}

function displayBeaconList()
{
    $('#found-beacons').empty();

    var timeNow = Date.now();

    $.each(beacons, function(key, beacon)
    {
        if (beacon.timeStamp + 60000 > timeNow)
        {
            var rssiWidth = 1; 
            if (beacon.rssi < -100) { rssiWidth = 100; }
            else if (beacon.rssi < 0) { rssiWidth = 100 + beacon.rssi; }

            var element = $(
                '<li>'
                +   '<strong>UUID: ' + beacon.uuid + '</strong><br />'
                +   'Major: ' + beacon.major + '<br />'
                +   'Minor: ' + beacon.minor + '<br />'
                +   'Proximity: ' + beacon.proximity + '<br />'
                +   'RSSI: ' + beacon.rssi + '<br />'
                +   'Distance: ' + beacon.distance + ' m<br />'                 
                +   '<div style="background:rgb(255,128,64);height:20px;width:'
                +       rssiWidth + '%;"></div>'
                + '</li>'
            );

            $('#warning').remove();
            $('#found-beacons').append(element);
        }
    });
}

return app;
})();

app.initialize();

Answer 1

距离是根据rssi值计算的。

你有rssi值吗？

如果是，您可以使用Radius Networks' ibeacon ranging fluctuation 计算与rssi的距离。

＆＃39; beacon.disance＆＃39;在我的应用程序的信标不起作用？

1 个答案: