我正在创建一个跨平台的应用程序来与蓝牙LE设备接口。该应用程序可以在安卓和iOS上运行,但在Windows上无法连接。当我调用pairAsync()
时,“连接”窗口会弹出一小段时间,然后变成“连接失败”。返回的状态为19,DevicePairingResultStatus.Failed
,“发生未知故障”。根据MS documentation的说法。
我正在使用cordova-plugin-bluetoothle来处理跨平台差异。我已经在多台带有内置蓝牙适配器和USB蓝牙适配器的计算机上进行了尝试。
连接代码:
connect: function (successCallback, errorCallback, params) {
if (!initialized) {
errorCallback({ error: "connect", message: "Not initialized." });
return;
}
var address = params && params[0] && params[0].address;
if (!address) {
errorCallback({ error: "connect", message: "Device address is not specified" });
return;
}
var DeviceInformation = Windows.Devices.Enumeration.DeviceInformation;
var DeviceInformationKind = Windows.Devices.Enumeration.DeviceInformationKind;
WinJS.Promise.wrap(address)
.then(function (deviceAddress) {
// If we have cached device info return it right now
if (WATCH_CACHE[deviceAddress]) return [WATCH_CACHE[deviceAddress]];
// Otherwise try to search it again
var selector = "System.Devices.Aep.ProtocolId:=\"{bb7bb05e-5972-42b5-94fc-76eaa7084d49}\" AND " +
"System.Devices.Aep.ContainerId:=\"{" + deviceAddress + "}\" AND " +
"(System.Devices.Aep.CanPair:=System.StructuredQueryType.Boolean#True OR " +
"System.Devices.Aep.IsPaired:=System.StructuredQueryType.Boolean#True)";
return DeviceInformation.findAllAsync(selector, ["System.Devices.Aep.ContainerId"], DeviceInformationKind.associationEndpoint);
})
.then(function (devices) {
return Windows.Devices.Bluetooth.BluetoothLEDevice.fromIdAsync(devices[0].id);
})
.then(function (bleDevice) {
var DevicePairingProtectionLevel = Windows.Devices.Enumeration.DevicePairingProtectionLevel;
var DevicePairingResultStatus = Windows.Devices.Enumeration.DevicePairingResultStatus;
var DevicePairingKinds = Windows.Devices.Enumeration.DevicePairingKinds;
if (bleDevice.deviceInformation.pairing.isPaired) {
return bleDevice;
}
if (!bleDevice.deviceInformation.pairing.canPair) {
throw { error: "connect", message: "The device does not support pairing" };
}
// TODO: investigate if it is possible to pair without user prompt
return bleDevice.deviceInformation.pairing.pairAsync(DevicePairingProtectionLevel.none)
.then(function (res) {
if (res.status === DevicePairingResultStatus.paired ||
res.status === DevicePairingResultStatus.alreadyPaired)
return bleDevice;
// I modified these two lines to return the actual error message instead of a generic rejection message
var msg = getDevicePairingResultStatusMessage(res.status);
throw { error: "connect", message: "(" + res.status + ") " + msg };
});
})
.done(function (bleDevice) {
var result = {
name: bleDevice.deviceInformation.name,
address: address,
status: "connected"
};
// Attach listener to device to report disconnected event
bleDevice.addEventListener('connectionstatuschanged', function connectionStatusListener(e) {
if (e.target.connectionStatus === Windows.Devices.Bluetooth.BluetoothConnectionStatus.disconnected) {
result.status = "disconnected";
successCallback(result);
bleDevice.removeEventListener('connectionstatuschanged', connectionStatusListener);
}
});
// Need to use keepCallback to be able to report "disconnect" event
// https://github.com/randdusing/cordova-plugin-bluetoothle#connect
successCallback(result, { keepCallback: true });
}, function (err) {
errorCallback(err);
});
}
https://stackoverflow.com/questions/50729326
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