// ping the device to verify if is still reachable
private async void PingDevice()
{
GattCommunicationStatus status = GattCommunicationStatus.ProtocolError;
// repeat the notify request
if (IsMiBand2)
{
status = await miBand.HeartRate.SetRealtimeHeartRateMeasurement(MiBand2SDK.Enums.RealtimeHeartRateMeasurements.ENABLE);
}
else
{
status = await HRReaderCharacteristic.WriteClientCharacteristicConfigurationDescriptorAsync(GattClientCharacteristicConfigurationDescriptorValue.Notify);
}
if (status == GattCommunicationStatus.Success)
{
if (DeviceConnected == false)
{
DeviceConnected = true;//the device is reachable
AddLog("Device \"" + ChosenDevice.Name + "\" is reachable again.", AppLog.LogCategory.Info);
}
}
else
{
if (DeviceConnected == true)
{
DeviceConnected = false; //the device is not reachable
AddLog("Device \"" + ChosenDevice.Name + "\" is NOT reachable. Is it still nearby?", AppLog.LogCategory.Warning);
}
}
}
private async Task DisconnectDevice()
{
if (ChosenDevice != null)
{
DeviceInformation delDev = ChosenDevice;
if (IsMiBand2 && miBand != null)
{
string bandName = ChosenDevice.Name;
AddLog($"Disconnecting from {bandName}...", AppLog.LogCategory.Debug);
if (miBand.IsConnected())
{
try {
await miBand.HeartRate.UnsubscribeFromHeartRateNotificationsAsync(MiBandHRValueChanged);
await miBand.HeartRate.SetRealtimeHeartRateMeasurement(MiBand2SDK.Enums.RealtimeHeartRateMeasurements.DISABLE);
} catch {
AddLog($"Device not connected.", AppLog.LogCategory.Debug);
}
}
miBand = null;
IsMiBand2 = false;
}
else
{
AddLog($"Disconnectiong from {ChosenDevice.Name}...", AppLog.LogCategory.Info);
try {
await HRReaderCharacteristic.
WriteClientCharacteristicConfigurationDescriptorAsync(GattClientCharacteristicConfigurationDescriptorValue.None); // notify the device the deisconnection
HRReaderCharacteristic.Service.Dispose();
HRReaderService.Dispose();
BluetoothDevice.Dispose();
} catch {
AddLog("Device comunication problem. Can't send disconnect signal.", AppLog.LogCategory.Debug);
}
}
DispatcherTimer.Stop();
HrTimerController.Stop();
ChosenDevice = null;
InitializeUIComponents();
AddLog($"{delDev.Name} sucessfully disconnected.", AppLog.LogCategory.Info);
}
else
{
AddLog($"There is no connected device.", AppLog.LogCategory.Info);
return;
}
}
async void BeginBluetoothReadProcess()
{
GattCommunicationStatus communicationStatus = GattCommunicationStatus.ProtocolError;
try {
AddLog("Sending notify request to device", AppLog.LogCategory.Debug);
communicationStatus = await HRReaderCharacteristic.WriteClientCharacteristicConfigurationDescriptorAsync(
GattClientCharacteristicConfigurationDescriptorValue.Notify);
} catch (Exception e) {
// the device refuses the notification request
AddLog("Request refused by device. Please retry.", AppLog.LogCategory.Warning);
AddLog($"Exception StackTrace: \n+ {e.StackTrace}\nMessage: {e.Message}", AppLog.LogCategory.Debug);
}
DeviceConnected = false;
switch (communicationStatus)
{
case GattCommunicationStatus.Success: {
AddLog($"Notify request activated. " +
$"\n[Gatt Comunication Status {communicationStatus.ToString()}", AppLog.LogCategory.Debug); // log
DeviceConnected = true; // change connection status
DispatcherTimerSetup();
ReadFromDevice();
break;
}
default: {
AddLog($"Notify request error" +
$"\n[Gatt Comunication Status {communicationStatus.ToString()}", AppLog.LogCategory.Debug); // log
break;
}
}
}