//---------------------------------------------------------------------
// Initialization and task cancellation
//---------------------------------------------------------------------
/// <summary>
/// Initializes local variables, like a constructor.
/// </summary>
private async Task Init()
{
//
// Step 1
// Acquire this device's IPv6 address from the local Bluetooth radio
//
generatedLocalIPv6AddressForNode = await StatelessAddressConfiguration.GenerateLinkLocalAddressFromBlThRadioIdAsync(2);
if (generatedLocalIPv6AddressForNode == null)
{
Debug.WriteLine("Could not generate the local IPv6 address.");
return;
}
//
// Step 3
// Enumerate nearby supported devices
//
await EnumerateNearbySupportedDevices();
//
// Step 4
// Spin up the GATT server service to listen for later replies
// over Bluetooth LE
//
gattServer = new GattServer();
gattServerStarted = await StartGattServer();
if (!gattServerStarted)
{
Debug.WriteLine("Aborting Init() because GATT server could " +
"not be started."
);
return;
}
//
// Step 5
// Initialize the message cache for 10 messages
//
messageCache = new Queue <byte[]>(10);
//
// Step 6
// Send 10 initial listening requests to the driver
//
//for (int i = 0; i < 10; i++)
//{
// Debug.WriteLine($"Sending listening request {++count}");
// SendListenRequestToDriver();
// Thread.Sleep(100); // Wait 1/10 second to start another one
//}
}
//public ICommand cmdConnect { get; }
//public ICommand cmdDisconnect { get; }
public BLEPage(IBluetoothLowEnergyAdapter adapter, BlePeripheralConnectionRequest connection)
{
Adapter = adapter;
Connection = connection;
// i command così non si bindano... Devono essere messi all'interno di una INotifyPropertyChanged...
//cmdConnect = new Command(async () => await Connect(true));
//cmdDisconnect = new Command(async () => await Connect(false));
InitializeComponent();
oldColor = lblTitolo.BackgroundColor;
Debug.WriteLine($"Connesso a {connection.GattServer.DeviceId} {connection.GattServer.Advertisement.DeviceName}");
GattServer = connection.GattServer;
try
{
notifyHandler = GattServer.NotifyCharacteristicValue(
serviceGuid,
buttonGuid,
bytes =>
{
// Attento. Qui può arrivarti un solo byte o due o quattro a seconda del tipo
// di dato che hai devinito lato ESP32...
// Ora lato ESP32 ho usato un uint16_t
var val = BitConverter.ToUInt16(bytes, 0);
Debug.WriteLine($"{bytes.Count()} byte ({val}) da {buttonGuid}");
swESP32.IsToggled = val == 1;
}
);
Device.StartTimer(TimeSpan.FromSeconds(0.2), () =>
{
AggiornaStato();
return(true); // True = Repeat again, False = Stop the timer
});
}
catch (GattException ex)
{
Debug.WriteLine(ex.ToString());
}
}
async void btnDisconnect_Clicked(object sender, System.EventArgs e)
{
// Forza la disconnessione
if (GattServer != null)
{
if (GattServer.State == ConnectionState.Connected ||
GattServer.State == ConnectionState.Connecting)
{
await GattServer.Disconnect();
}
}
// una volta disconnesso, meglio spegnere anche i notificatori...
if (buttonNotifyHandler != null)
{
buttonNotifyHandler.Dispose();
}
await Navigation.PopModalAsync();
}
async void AggiornaStato()
{
bool connesso = false;
if (GattServer != null)
{
connesso = GattServer.State == ConnectionState.Connected;
// Aggiorna visualizzazione stato connessione;
GestioneStatoConnessione(connesso);
if (connesso)
{
try
{
int sliderValore = Convert.ToInt32(slValore.Value);
if (sliderValore != oldSliderValue)
{
oldSliderValue = sliderValore;
// Spedisce il valore dello slider
byte[] bufferDaSpedire = BitConverter.GetBytes(sliderValore);
var result = await GattServer.WriteCharacteristicValue(
serviceGuid, sliderGuid,
bufferDaSpedire
);
}
}
catch (Exception errore)
{
Debug.WriteLine(errore.ToString());
}
}
}
}
public BLEPage(IBluetoothLowEnergyAdapter adapter, BlePeripheralConnectionRequest connection)
{
Adapter = adapter;
Connection = connection;
// i command così non si bindano... Devono essere messi all'interno di una INotifyPropertyChanged...
//cmdConnect = new Command(async () => await Connect(true));
//cmdDisconnect = new Command(async () => await Connect(false));
InitializeComponent();
oldColor = lblTitolo.BackgroundColor;
Valori = new Models.AdcValues();
Debug.WriteLine($"Connesso a {connection.GattServer.DeviceId} {connection.GattServer.Advertisement.DeviceName}");
GattServer = connection.GattServer;
try
{
// Mi registro per ricevere le notifiche del bottone lato ESP32
buttonNotifyHandler = GattServer.NotifyCharacteristicValue(
serviceGuid,
buttonGuid,
bytes =>
{
// Attento. Qui può arrivarti un solo byte o due o quattro a seconda del tipo
// di dato che hai definito lato ESP32...
// Ora lato ESP32 ho usato un uint16_t
var valuleFromESP32 = BitConverter.ToUInt16(bytes, 0);
Debug.WriteLine($"{bytes.Count()} byte ({valuleFromESP32}) da {buttonGuid}");
swESP32.IsToggled = valuleFromESP32 == 1;
}
);
// Mi registro per ricevere le notifiche dell ADC lato ESP32
adcNotifyHandler = GattServer.NotifyCharacteristicValue(
serviceGuid,
adcGuid,
bytes =>
{
// Attento. Qui può arrivarti un solo byte o due o quattro a seconda del tipo
// di dato che hai definito lato ESP32...
// Ora lato ESP32 ho usato un int (signed)
var valuleFromESP32 = BitConverter.ToInt32(bytes, 0);
Debug.WriteLine($"{bytes.Count()} byte ({valuleFromESP32}) da {adcGuid}");
lblADCVal.Text = valuleFromESP32.ToString();
Valori.Add(new Models.AdcValue {
Time = DateTime.Now, Value = valuleFromESP32
});
if (Valori.Count > 100)
{
Valori.RemoveAt(0);
}
chart.ItemsSource = null;
chart.ItemsSource = Valori;
}
);
Device.StartTimer(TimeSpan.FromSeconds(0.2), () =>
{
AggiornaStato();
return(true); // True = Repeat again, False = Stop the timer
});
}
catch (GattException ex)
{
Debug.WriteLine(ex.ToString());
}
}
async void OnSuClicked(object sender, System.EventArgs e)
{
potenza = potenza + 1;
try
{
int sliderValore = Convert.ToInt32(77777777);
// Spedisce il valore dello slider
byte[] bufferDaSpedire = BitConverter.GetBytes(sliderValore);
var result = await GattServer.WriteCharacteristicValue(
serviceGuid, sliderGuid,
bufferDaSpedire
);
}
catch (Exception errore)
{
Debug.WriteLine(errore.ToString());
}
}
async void OnGiuClicked(object sender, System.EventArgs e)
{
potenza = potenza - 1;
try
{
int sliderValore = Convert.ToInt32(44444444);
// Spedisce il valore dello slider
byte[] bufferDaSpedire = BitConverter.GetBytes(sliderValore);
var result = await GattServer.WriteCharacteristicValue(
serviceGuid, sliderGuid,
bufferDaSpedire
);
}
catch (Exception errore)
{
Debug.WriteLine(errore.ToString());
}
}
public static GattServer.GattServerService.GattServerCharacteristic.GattServerDescriptor ToDescriptor(this Android.Bluetooth.BluetoothGattDescriptor self, GattServer server)
{
var service = server.GattServices.GetFromUuid(self.Characteristic.Service.Uuid.ToGuid());
var characteristic = service.GattCharacteristics.GetFromUuid(self.Characteristic.Uuid.ToGuid());
var descriptor = characteristic.Descriptors.GetFromUuid(self.Uuid.ToGuid());
return(descriptor);
//var descriptor = characteristic.Descriptors.GetFromUuid(self.Uuid);
}
private async void startButton_Click(object sender, RoutedEventArgs e)
{
overallStatusBox.Text = "Starting...";
//
// Step 1
// Acquire this device's IPv6 address from the local Bluetooth radio
//
generatedLocalIPv6AddressForNode = await StatelessAddressConfiguration.GenerateLinkLocalAddressFromBlThRadioIdAsync(2);
if (generatedLocalIPv6AddressForNode == null)
{
overallStatusBox.Text = "Could not generate the local IPv6 address.";
throw new Exception();
}
//localIPv6AddressesForDesktop = GetLocalIPv6AddressesOnDesktop();
//if (localIPv6AddressesForDesktop == null)
//{
// overallStatusBox.Text = "Could not acquire the local IPv6 address(es).";
// throw new Exception();
//}
//
// Step 3
// Enumerate nearby supported devices
//
await EnumerateNearbySupportedDevices();
//
// Step 4
// Spin up the GATT server service to listen for later replies
// over Bluetooth LE
//
gattServer = new GattServer();
gattServerStarted = await StartGattServer();
if (!gattServerStarted)
{
Debug.WriteLine("Aborting Init() because GATT server could " +
"not be started."
);
return;
}
//
// Step 5
// Initialize the message cache for 10 messages
//
messageCache = new Queue <byte[]>(10);
//
// Step 6
// Send 10 initial listening requests to the driver
//
//Debug.WriteLine($"Sending listening request {++count}");
//SendListenRequestToDriver();
overallStatusBox.Text = "Finished starting.";
}
async void OnBluetoothClicked(object sender, System.EventArgs e)
{
// Forza la disconnessione
if (GattServer != null)
{
if (GattServer.State == ConnectionState.Connected ||
GattServer.State == ConnectionState.Connecting)
{
await GattServer.Disconnect();
}
}
// una volta disconnesso, meglio spegnere anche i notificatori...
if (notifyHandler != null)
notifyHandler.Dispose();
await Navigation.PushModalAsync(new Bluetooth(Adapter));
}
