我是这个 UWP 的新手，请耐心等待。我修改了以下MS GitHub中的代码:Link创建一个可以“观看”BTLE 广告的 Windows Phone 应用程序。
但它无法读取任何广告。我的手机确实支持 BTLE，我可以在 Windows BT 设置中看到设备，因此该设备也在宣传它。请帮我找出我错在哪里以及为什么。
这是我的 JS 代码:
var watcher = new Windows.Devices.Bluetooth.Advertisement.BluetoothLEAdvertisementWatcher();
//watcher.signalStrengthFilter.inRangeThresholdInDBm = -70;
//watcher.signalStrengthFilter.outOfRangeThresholdInDBm = -75;
//watcher.signalStrengthFilter.outOfRangeTimeout = 2000;
$(document).ready(function () {
console.log("HERE: ready");
watcher.onreceived = onAdvertisementReceived;
$("button#start").unbind('click').on('click', function (e) {
console.log('CLICKED >');
e.preventDefault();
watcher.start();
});
$("button#stop").unbind('click').on('click', function (e) {
console.log('CLICKED <');
e.preventDefault();
watcher.stop();
});
});
function onAdvertisementReceived(eventArgs) {
console.log("HERE: function watcher", eventArgs);
var timestamp = eventArgs.timestamp;
var advertisementType = eventArgs.advertisementType;
var rssi = eventArgs.rawSignalStrengthInDBm;
var localName = eventArgs.advertisement.localName;
$("div#list > ul").append("<li> Timestamp: <strong>" + timestamp.getHours() + ":" + timestamp.getMinutes() +
":" + timestamp.getSeconds() + "</strong> Type:" + advertisementType.toString() + " RSSI:" + rssi.toString() + " Name:" +
localName + "</li>");
}
这是我的 HTML 代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Bluetooth LE Smart Watch</title>
<link href="css/default.css" rel="stylesheet" />
<link href="css/materialize.min.css" rel="stylesheet" />
</head>
<body class="container">
<div class="row">
<h4>List of BTLE Devices</h4>
<button class="btn" id="start">Start Watcher</button><button class="btn" id="stop">Stop Watcher</button>
<div id="list" class="col m12 s12">
<ul>
</ul>
</div>
</div>
<script src="js/jquery-2.2.4.min.js"></script>
<script src="js/materialize.min.js"></script>
<script src="js/main.js"></script>
</body>
</html>
最佳答案
But it is not able to read it any advertisements. My phone does support BTLE, I am able to see the devices in Windows BT Settings so the device is advertising it too. Please help me find where I am wrong and why.
要使 BTLE 工作，您需要在 package.appxmannifest 中启用蓝牙功能。 。您可以通过以下方式实现此目的:
在VS2015中->双击package.appxmannifest ->功能->检查蓝牙功能。
或者您可以打开package.appxmannifest在代码 View 中添加 <DeviceCapability Name="bluetooth" />在功能标签中:
<Capabilities>
<Capability Name="internetClient" />
<DeviceCapability Name="bluetooth" />
</Capabilities>
关于javascript - UWP BTLE : Cannot read device advertisements，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40234788/