private void IBleStack_DiscoveryComplete(IBleStack sender, BleDiscoveryStatus status)
{
ExecuteOnMainThread.BeginInvoke(() =>
{
string discovery_status = "Discovery status : ";
switch (status)
{
case BleDiscoveryStatus.BDS_COMPLETE:
{
discovery_status += "Complete!";
break;
}
case BleDiscoveryStatus.BDS_CANCELED:
{
discovery_status += "Canceled!";
break;
}
case BleDiscoveryStatus.BDS_FAILED:
{
discovery_status += "Failed!";
break;
}
default:
{
discovery_status += "Unknown...";
break;
}
}
lbStatus.Text = discovery_status;
});
}
/// <summary>
/// Called when the discovery process is complete
/// </summary>
/// <param name="sender">Device watcher which did the discovery process</param>
/// <param name="e">not used, always null</param>
private void DeviceWatcher_EnumerationCompleted(DeviceWatcher sender, object e)
{
// Update discovery status
_discovery_status = BleDiscoveryStatus.BDS_COMPLETE;
_device_watcher.Stop();
// Notify end of discovery
DiscoveryComplete?.Invoke(this, BleDiscoveryStatus.BDS_COMPLETE);
}
/// <summary>
/// Called when the discovery process has been stopped
/// </summary>
/// <param name="sender">Device watcher which did the discovery process</param>
/// <param name="e">not used, always null</param>
private void DeviceWatcher_Stopped(DeviceWatcher sender, object e)
{
// Check if the discovery process is not already complete
if (_discovery_status != BleDiscoveryStatus.BDS_COMPLETE)
{
// Update discovery status
_discovery_status = BleDiscoveryStatus.BDS_CANCELED;
// Notify end of discovery
DiscoveryComplete?.Invoke(this, BleDiscoveryStatus.BDS_CANCELED);
}
}
/// <summary>
/// Start the discovery of BLE devices
/// </summary>
/// <returns>true if the discovery has started, fals otherwise</returns>
public bool StartDeviceDiscovery()
{
bool ret = false;
// Check if the discovery process is stopped
if (_device_watcher.Status != DeviceWatcherStatus.Started)
{
// Start the discovery process
_device_watcher.Start();
_discovery_status = BleDiscoveryStatus.BDS_IN_PROGRESS;
ret = true;
}
return(ret);
}
/// <summary>
/// Constructor
/// </summary>
public UwpBleStack()
{
// Create a device watcher to discover BLE devices only with their associated properties
string[] requested_properties = { "System.Devices.Aep.DeviceAddress", "System.Devices.Aep.IsConnected", "System.Devices.Aep.Bluetooth.Le.IsConnectable" };
string aqs_ble_devices = "(System.Devices.Aep.ProtocolId:=\"{bb7bb05e-5972-42b5-94fc-76eaa7084d49}\")";
_device_watcher = DeviceInformation.CreateWatcher(aqs_ble_devices,
requested_properties,
DeviceInformationKind.AssociationEndpoint);
// Register to watcher events
_device_watcher.Added += DeviceWatcher_Added;
_device_watcher.Updated += DeviceWatcher_Updated;
_device_watcher.Removed += DeviceWatcher_Removed;
_device_watcher.EnumerationCompleted += DeviceWatcher_EnumerationCompleted;
_device_watcher.Stopped += DeviceWatcher_Stopped;
// Intialize discovery status
_discovery_status = BleDiscoveryStatus.BDS_STOPPED;
}