private static async Task <BluetoothDevice> PlatformFromId(string id)
{
BluetoothLEDevice device = null;
if (ulong.TryParse(id, System.Globalization.NumberStyles.HexNumber, null, out var parsedId))
{
if (Bluetooth.KnownDevices.ContainsKey(parsedId))
{
BluetoothDevice knownDevice = (BluetoothDevice)Bluetooth.KnownDevices[parsedId].Target;
if (knownDevice != null)
{
return(knownDevice);
}
}
device = await BluetoothLEDevice.FromBluetoothAddressAsync(parsedId);
}
else
{
device = await BluetoothLEDevice.FromIdAsync(id);
}
if (device != null)
{
var success = await device.RequestAccessAsync();
System.Diagnostics.Debug.WriteLine($"RequestAccessAsync {success}");
}
return(device);
}
public async void ListCurrentDeviceServicesToLog()
{
//CheckBluetoothStatus(true);
BluetoothLEDevice device = await BluetoothLEDevice.FromIdAsync(ChosenDevice.Id);
if (device == null)
{
return;
}
DeviceAccessStatus accessStatus = await device.RequestAccessAsync();
var deviceServicesResult = await device.GetGattServicesAsync();
// build the string to add in the log
string services = "[Services list of " + device.Name + "]";
int i = 0;
foreach (GattDeviceService service in deviceServicesResult.Services)
{
services += "\n -- Handle: \t" + service.AttributeHandle.ToString();
services += "\n --> UUID: \t" + service.Uuid.ToString();
services += "\n --> Access Info: \t" + service.DeviceAccessInformation.CurrentStatus.ToString();
i++;
if (i < deviceServicesResult.Services.Count)
{
services += "\n----------------------------------------------------------------";
}
}
services += "\n\nFor info on Bluetooth Standard codes and identifiers, please visit https://www.bluetooth.com/specifications/assigned-numbers" + "\n";
// add log
AddLog(services, AppLog.LogCategory.Debug);
}
/// <summary>
/// Try to connect with the pen.
/// </summary>
/// <param name="penInformation">PenInformation instance that holds the pen's information</param>
/// <returns>True or false if the connection is successful</returns>
public async Task <bool> Connect(PenInformation penInformation)
{
try
{
if (penInformation.Protocol != Protocols.V2)
{
throw new NotSupportedException("Not supported protocol version");
}
await semaphreSlime.WaitAsync();
Debug.WriteLine("");
bluetoothLEDevice = await BluetoothLEDevice.FromIdAsync(penInformation.Id);
var status = await bluetoothLEDevice.RequestAccessAsync();
Debug.WriteLine("RequestAccessAsync result is " + status.ToString());
if (status != Windows.Devices.Enumeration.DeviceAccessStatus.Allowed)
{
throw new Exception();
}
GattDeviceServicesResult result = await bluetoothLEDevice.GetGattServicesAsync(BluetoothCacheMode.Uncached);
if (result.Status != GattCommunicationStatus.Success || await Bind(result.Services) == false)
{
Debug.WriteLine("GetGattServicesAsync status is " + result.Status.ToString());
throw new Exception();
}
bluetoothLEDevice.ConnectionStatusChanged += BluetoothLEDevice_ConnectionStatusChanged;
return(true);
}
catch
{
DisposeBluetoothResource();
return(false);
}
finally
{
semaphreSlime.Release();
}
}
private bool BluetoothSetup()
{
BluetoothLEDevice device = this.Waitfor(
"connection to Bluetooth device",
BluetoothLEDevice.FromBluetoothAddressAsync(System.Convert.ToUInt64("001580912553", 16)));
if (device == null)
{
this.logEol("Device wasn't found");
return(false);
}
GattDeviceServicesResult deviceServices = this.Waitfor(
"device services", device.GetGattServicesAsync());
DeviceAccessStatus deviceAccessStatus = this.Waitfor(
"device access", device.RequestAccessAsync());
this.logEol($"Device access status: {deviceAccessStatus}");
System.Guid gyroServiceGuid = System.Guid.Parse("0000ffe0-0000-1000-8000-00805f9b34fb");
GattDeviceService gyroService = deviceServices.Services.Single(x => x.Uuid.Equals(gyroServiceGuid));
var gyroServiceAccessStatus = this.Waitfor(
"gro data service access", gyroService.RequestAccessAsync());
this.logEol($"Gyro service access status: {gyroServiceAccessStatus}");
GattCharacteristicsResult characteristics = this.Waitfor(
"gyro data service", gyroService.GetCharacteristicsAsync());
this.txRxChannel = characteristics
.Characteristics
.SingleOrDefault(x => x.UserDescription.Replace(" ", "") == "TX&RX");
if (this.txRxChannel == default(GattCharacteristic))
{
this.logEol("Couldn't find TXRX channel...disconnected?");
return(false);
}
this.txRxChannel.ValueChanged += this.TxRx_ValueChanged;
return(true);
}
public async Task DiscoverServicesAsync()
{
m_Device = await BluetoothLEDevice.FromBluetoothAddressAsync(BluetoothAddress);
var info = m_Device.DeviceInformation;
PrintInfo(info);
m_Device.ConnectionStatusChanged += OnConnectionChanged;
m_Device.GattServicesChanged += OnGattServicesChanged;
var access = await m_Device.RequestAccessAsync();
if (access != Windows.Devices.Enumeration.DeviceAccessStatus.Allowed)
{
throw new Exception("could not access BLE");
}
await Task.Delay(2000);
await FillServices();
}
public static async Task Connect(string deviceId)
{
deviceReference = await BluetoothLEDevice.FromIdAsync(deviceId);
await deviceReference.RequestAccessAsync();
GattDeviceServicesResult result = await deviceReference.GetGattServicesAsync();
//Allways check result!
if (result.Status == GattCommunicationStatus.Success)
{
//Put following two lines in try/catch to or check for null!!
var characs = await result.Services.Single(s => s.Uuid == Uuids.PoolLabSvc).GetCharacteristicsAsync();
cmdMisoCharacteristic = characs.Characteristics.Single(c => c.Uuid == Uuids.CmdMiso);
cmdMosiCharacteristic = characs.Characteristics.Single(c => c.Uuid == Uuids.CmdMosi);
misoSigCharacteristic = characs.Characteristics.Single(c => c.Uuid == Uuids.MisoSig);
#if DEBUG
if (BitConverter.IsLittleEndian)
{
Debug.WriteLine("LittleEndian");
}
else
{
Debug.WriteLine("BigEndian");
}
if (cmdMisoCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Read))
{
Debug.WriteLine("CommandMISO characteristic supports reading from it.");
}
if (cmdMisoCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Write))
{
Debug.WriteLine("CommandMISO characteristic supports writing.");
}
if (cmdMisoCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.ReliableWrites))
{
Debug.WriteLine("MISO_Signal characteristic supports reliable writing.");
}
if (cmdMisoCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.WriteWithoutResponse))
{
Debug.WriteLine("MISO_Signal characteristic supports writing without response.");
}
if (cmdMisoCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Notify))
{
Debug.WriteLine("CommandMISO characteristic supports subscribing to notifications.");
}
if (cmdMosiCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Read))
{
Debug.WriteLine("CommandMOSI characteristic supports reading from it.");
}
if (cmdMosiCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Write))
{
Debug.WriteLine("CommandMOSI characteristic supports writing.");
}
if (cmdMosiCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.ReliableWrites))
{
Debug.WriteLine("MISO_Signal characteristic supports reliable writing.");
}
if (cmdMosiCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.WriteWithoutResponse))
{
Debug.WriteLine("MISO_Signal characteristic supports writing without response.");
}
if (cmdMosiCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Notify))
{
Debug.WriteLine("CommandMOSI characteristic supports subscribing to notifications.");
}
if (misoSigCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Read))
{
Debug.WriteLine("MISO_Signal characteristic supports reading from it.");
}
if (misoSigCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Write))
{
Debug.WriteLine("MISO_Signal characteristic supports writing.");
}
if (misoSigCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.ReliableWrites))
{
Debug.WriteLine("MISO_Signal characteristic supports reliable writing.");
}
if (misoSigCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.WriteWithoutResponse))
{
Debug.WriteLine("MISO_Signal characteristic supports writing without response.");
}
if (misoSigCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Notify))
{
Debug.WriteLine("MISO_Signal characteristic supports subscribing to notifications.");
}
if (misoSigCharacteristic.CharacteristicProperties.HasFlag(GattCharacteristicProperties.Indicate))
{
Debug.WriteLine("MISO_Signal characteristic supports indicate.");
}
#endif
IsConnected = true;
}
else
{
Debug.WriteLine("No services found");
}
}
public async Task <bool> TryToConnect(string deviceId)
{
if (string.IsNullOrWhiteSpace(deviceId))
{
this.logger.Error($"'{nameof(deviceId)}' argument is null or empty");
return(false);
}
bool success = false;
try
{
GattDeviceService service = null;
GattCharacteristic responseCharacteristic = null;
BluetoothLEDevice bluetoothLeDevice = await BluetoothLEDevice.FromIdAsync(deviceId)
.AsTask()
.ConfigureAwait(false);
if (bluetoothLeDevice == null)
{
this.logger.Error($"failed to create BLE device with id = '{deviceId}'");
return(false);
}
this.bluetoothLeDevice = bluetoothLeDevice;
bluetoothLeDevice.ConnectionStatusChanged += OnConnectionStatusChanged;
DeviceAccessStatus deviceStatus = await bluetoothLeDevice.RequestAccessAsync()
.AsTask()
.ConfigureAwait(false);
if (deviceStatus != DeviceAccessStatus.Allowed)
{
this.logger.Error($"failed to get access to BLE device with id = '{deviceId}'");
return(false);
}
// the following method connects to BLE device (and will call OnConnectionStatusChanged)
GattDeviceServicesResult result = await bluetoothLeDevice.GetGattServicesAsync(BluetoothCacheMode.Uncached)
.AsTask()
.ConfigureAwait(false);
if (result.Status == GattCommunicationStatus.Success)
{
service = result.Services.Where(s => s.Uuid == SERVICE_GUID)
.FirstOrDefault();
if (service == null)
{
this.logger.Error($"BLE device with id = '{deviceId}' doesn't have '{SERVICE_GUID}' service");
return(false);
}
GattOpenStatus status = await service.OpenAsync(GattSharingMode.Exclusive)
.AsTask()
.ConfigureAwait(false);
if (status != GattOpenStatus.Success)
{
this.logger.Error($"failed to open '{SERVICE_GUID}' service on BLE device with id = '{deviceId}', result = '{status}'");
return(false);
}
GattCharacteristicsResult characteristicsResult = characteristicsResult = await service.GetCharacteristicsForUuidAsync(RESPONSE_CHARACTERISTICS_GUID)
.AsTask()
.ConfigureAwait(false);
if (characteristicsResult.Status != GattCommunicationStatus.Success)
{
this.logger.Error($"failed to get '{RESPONSE_CHARACTERISTICS_GUID}' characteristic from '{SERVICE_GUID}' " +
$"service on BLE device with id = '{deviceId}', result = '{characteristicsResult.Status}', protocol error = {characteristicsResult.ProtocolError}");
return(false);
}
responseCharacteristic = characteristicsResult.Characteristics.FirstOrDefault();
if (responseCharacteristic == null)
{
this.logger.Error($"'{RESPONSE_CHARACTERISTICS_GUID}' characteristic doesn't seem to have any characteristics in '{SERVICE_GUID}' service on BLE device with id = '{deviceId}'");
return(false);
}
}
else
{
this.logger.Error($"failed to retreive services provided by BLE device with id = '{deviceId}', result = '{result.Status}', protocol error = '{result.ProtocolError}'");
return(false);
}
this.service = service;
this.responseCharacteristic = responseCharacteristic;
this.responseCharacteristic.ValueChanged += OnCharacteristicValueChanged;
success = true;
return(true);
}
catch (Exception e)
{
this.logger.Error(e, "unexpected exception while connecting to BLE device");
return(false);
}
finally
{
if (!success)
{
Disconnect();
}
}
}
private async Task DisplayBluetooth(NameDevice knownDevice, DeviceInformationWrapper di, BluetoothLEDevice ble)
{
var jsonFormat = Newtonsoft.Json.Formatting.Indented;
var jsonSettings = new Newtonsoft.Json.JsonSerializerSettings()
{
DefaultValueHandling = Newtonsoft.Json.DefaultValueHandling.Ignore,
NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore,
ContractResolver = IgnoreEmptyEnumerableResolver.Instance,
};
var wireAllDevices = new NameAllBleDevices();
WireDevice = new NameDevice();
WireDevice.Name = di.di.Name;
WireDevice.Details += $"Id:{di.di.Id}\nCanPair:{di.di.Pairing.CanPair} IsPaired:{di.di.Pairing.IsPaired}";
wireAllDevices.AllDevices.Add(WireDevice);
WireDevice.ClassModifiers = knownDevice.ClassModifiers;
WireDevice.ClassName = knownDevice.ClassName;
WireDevice.Description = knownDevice.Description;
uiRawData.Text = Newtonsoft.Json.JsonConvert.SerializeObject(WireDevice, jsonFormat);
string raw = null;
if (ble == null)
{
// Happens if another program is trying to use the device!
raw = $"BLE: ERROR: Another app is using this device.\n";
}
else
{
// TODO: remove this code which is only here while I investigate the WESCALE scale
#if NEVER_EVER_DEFINED
{
// WESCALE: no gatt services
var services = ble.GattServices;
var count = services.Count;
var devacc = ble.DeviceAccessInformation;
var devaccstatus = devacc.CurrentStatus;
foreach (var service in services)
{
var chars = service.GetAllCharacteristics();
}
try
{
var guid = Guid.Parse("0000fff0-0000-1000-8000-00805f9b34fb");
var request = await ble.RequestAccessAsync();
var allservice = await ble.GetGattServicesForUuidAsync(guid);
var servicefff0 = ble.GetGattService(guid);
var charsfff0 = servicefff0.GetAllCharacteristics();
var countfff0 = charsfff0.Count;
foreach (var ch in charsfff0)
{
;
}
}
catch (Exception ex)
{
;
}
}
#endif
var result = await ble.GetGattServicesAsync();
if (result.Status != GattCommunicationStatus.Success)
{
raw += GetStatusString(result.Status, result.ProtocolError);
}
else
{
var header = new BleDeviceHeaderControl();
await header.InitAsync(ble);
int serviceCount = 0;
foreach (var service in result.Services)
{
await header.AddServiceAsync(ble, service);
var shouldDisplay = ServiceShouldBeEdited(service);
var defaultService = knownDevice.GetService(service.Uuid.ToString("D"));
var wireService = new NameService(service, defaultService, serviceCount++);
WireDevice.Services.Add(wireService);
try
{
var cresult = await service.GetCharacteristicsAsync();
if (cresult.Status != GattCommunicationStatus.Success)
{
raw += GetStatusString(cresult.Status, cresult.ProtocolError);
}
else
{
var characteristicCount = 0;
foreach (var characteristic in cresult.Characteristics)
{
//The descriptors don't seem to be actually interesting. it's how we read and write.
var descriptorStatus = await characteristic.GetDescriptorsAsync();
if (descriptorStatus.Status == GattCommunicationStatus.Success)
{
foreach (var descriptor in descriptorStatus.Descriptors)
{
;
}
}
var defaultCharacteristic = defaultService?.GetChacteristic(characteristic.Uuid.ToString("D"));
var wireCharacteristic = new NameCharacteristic(characteristic, defaultCharacteristic, characteristicCount++);
wireService.Characteristics.Add(wireCharacteristic);
if (wireCharacteristic.Suppress)
{
continue; // don't show a UI for a supressed characteristic.
}
//
// Here are each of the editor children items
//
var edit = new BleCharacteristicControl(knownDevice, service, characteristic);
uiEditor.Children.Add(edit);
var dc = DeviceCharacteristic.Create(characteristic);
//NOTE: does any device have a presentation format?
foreach (var format in characteristic.PresentationFormats)
{
raw += $" Fmt: Description:{format.Description} Namespace:{format.Namespace} Type:{format.FormatType} Unit: {format.Unit} Exp:{format.Exponent}\n";
}
try
{
if (wireCharacteristic.IsRead)
{
var vresult = await characteristic.ReadValueAsync();
if (vresult.Status != GattCommunicationStatus.Success)
{
raw += GetStatusString(vresult.Status, vresult.ProtocolError);
}
else
{
var dt = BluetoothLEStandardServices.GetDisplayInfo(service, characteristic);
var hexResults = dt.AsString(vresult.Value);
wireCharacteristic.ExampleData.Add(hexResults);
// And add as a converted value
var NC = BleNames.Get(knownDevice, service, characteristic);
var decode = NC?.Type;
if (decode != null && !decode.StartsWith("BYTES|HEX"))
{
var decoded = ValueParser.Parse(vresult.Value, decode);
wireCharacteristic.ExampleData.Add(decoded.UserString);
}
}
}
}
catch (Exception e)
{
raw += $" Exception reading value: {e.HResult} {e.Message}\n";
}
// Update the UI with the latest discovery
// Later: or not. The raw data isn't super useful.
//uiRawData.Text = Newtonsoft.Json.JsonConvert.SerializeObject(WireDevice, jsonFormat);
}
}
}
catch (Exception e)
{
raw += $" Exception reading characteristic: {e.HResult} {e.Message}\n";
}
}
}
}
JsonAsList = Newtonsoft.Json.JsonConvert.SerializeObject(wireAllDevices, jsonFormat, jsonSettings);
JsonAsSingle = Newtonsoft.Json.JsonConvert.SerializeObject(WireDevice, jsonFormat, jsonSettings);
uiProgress.IsActive = false;
uiRawData.Text += raw;
return;
}
private async void Bleaw_Received(BluetoothLEAdvertisementWatcher sender, BluetoothLEAdvertisementReceivedEventArgs args)
{
if (sender == null)
{
return;
}
bool OK = false;
if (System.Threading.Interlocked.Increment(ref barrier) == 1)
{
BLEAdvWatcher.Stop();
Guid guidNotification;
ulong blAdress = args.BluetoothAddress;;
BluetoothLEDevice blDevice = await
Windows.Devices.Bluetooth.BluetoothLEDevice.FromBluetoothAddressAsync(blAdress);
if (!(blDevice == null))
{
var name = blDevice.Name;
System.Diagnostics.Debug.WriteLine("Device Name=:", name);
if ((blDevice.DeviceInformation.Kind ==
Windows.Devices.Enumeration.DeviceInformationKind.AssociationEndpoint) &&
(NameFilter == ""?true:name.ToLower().Contains(NameFilter.ToLower())))
{
System.Diagnostics.Debug.WriteLine("Bluetooth Address: {0}", blAdress);
await CC2650SensorTag.PrependTextStatic(string.Format("Bluetooth Address: {0}", blAdress));
byte[]
bytes = BitConverter.GetBytes(blAdress);
string res = System.Text.Encoding.UTF8.GetString(bytes);
string addrStr = bytes[bytes.Length - 3].ToString("X2");
for (int i = bytes.Length - 4; i > -1; i--)
{
addrStr += ":" + bytes[i].ToString("X2");
}
System.Diagnostics.Debug.WriteLine("Bluetooth Address: {0}", addrStr);
await CC2650SensorTag.PrependTextStatic(string.Format("Bluetooth Address: {0}", addrStr));
var scanresp = args.AdvertisementType;
Windows.Devices.Enumeration.DeviceAccessStatus result;
try
{
result = await blDevice.RequestAccessAsync();
}
catch (Exception ex)
{
result = Windows.Devices.Enumeration.DeviceAccessStatus.DeniedBySystem;
}
if (result == Windows.Devices.Enumeration.DeviceAccessStatus.Allowed)
{
name = blDevice.Name;
System.Diagnostics.Debug.WriteLine("Endpoint Device Name: {0}", name);
await CC2650SensorTag.PrependTextStatic(string.Format("Endpoint Device Name: {0}", name));
var services = await blDevice.GetGattServicesAsync();
var svcs = services.Services;
System.Diagnostics.Debug.WriteLine("Endpoint Device Id: {0}", blDevice.DeviceId);
await CC2650SensorTag.PrependTextStatic(string.Format("Endpoint Device Id: {0}", blDevice.DeviceId));
System.Diagnostics.Debug.WriteLine("Start");
string nm = blDevice.Name;
string did = blDevice.DeviceId;
string info = blDevice.DeviceInformation.Name;
if (svcs != null)
{
int num = svcs.Count;
if (num != 0)
{
foreach (var x in svcs)
{
string sdf = x.Uuid.ToString();
string asdcb = x.DeviceId;
System.Diagnostics.Debug.WriteLine("{0} = {1}", sdf, asdcb);
}
await TagServices.InterogateServices(svcs);
OK = true;
}
else
{
System.Diagnostics.Debug.WriteLine("No Services.");
OK = false;
}
}
else
{
System.Diagnostics.Debug.WriteLine("ull Services.");
OK = false;
}
}
}
}
}
if (!OK)
{
System.Threading.Interlocked.Decrement(ref barrier);
BLEAdvWatcher.Start();
}
}
public async Task <Boolean> TryLocateServices(BluetoothLEDevice bluetoothLeDevice)
{
// Only one init
if (GattDeviceServiceTemperature != null || GattDeviceServiceLuminosity != null || GattDeviceServiceBattery != null)
{
return(true);
}
// Try get access to device
Windows.Devices.Enumeration.DeviceAccessStatus result;
try
{
result = await bluetoothLeDevice.RequestAccessAsync();
}
catch (Exception)
{
result = Windows.Devices.Enumeration.DeviceAccessStatus.DeniedBySystem;
}
// Access denied
if (result != DeviceAccessStatus.Allowed)
{
return(false);
}
// Get services of device in loop with timeout of 100 ms
GattDeviceServicesResult gattDeviceServicesResult = null;
for (int i = 0; i < 5; i++)
{
// Try get list of services
gattDeviceServicesResult = await bluetoothLeDevice.GetGattServicesAsync(BluetoothCacheMode.Uncached);
// Any services in list
if (gattDeviceServicesResult?.Services.Count > 0)
{
break;
}
// Wait 100 ms
await Task.Delay(100).ConfigureAwait(false);
}
// No services available
if (gattDeviceServicesResult == null || gattDeviceServicesResult?.Services.Count == 0)
{
return(false);
}
// Iterate services
foreach (var service in gattDeviceServicesResult.Services)
{
// 9dc84838-7619-4f09-a1ce-ddcf63225b20 is the luminosity service
if (String.Compare(LuminosityGattServiceUuuid, service.Uuid.ToString(),
StringComparison.OrdinalIgnoreCase) == 0)
{
GattDeviceServiceLuminosity = service;
}
if (String.Compare(BatteryGattServiceUuuid, service.Uuid.ToString(),
StringComparison.OrdinalIgnoreCase) == 0)
{
GattDeviceServiceBattery = service;
}
if (String.Compare(TemperatureGattServiceUuid, service.Uuid.ToString(),
StringComparison.OrdinalIgnoreCase) == 0)
{
GattDeviceServiceTemperature = service;
}
}
double batteryLevel = await ReadBatteryValue().ConfigureAwait(true);
double lux = await ReadLuminosityValue().ConfigureAwait(true);
Debug.WriteLine($"SensorBug Lux {lux} lx battery level {batteryLevel} %");
await ReadValues().ConfigureAwait(true);
// we can read values => start imer
ThreadHelper.RunOnMainThread(() =>
{
Timer?.Start();
});
return(true);
}
//Connect to the chosen device
private async void ConnectDevice()
{
if (DeviceInterfacesOutputLst.SelectedItem != null)
{
string DeviceID = ""; //Device ID
foreach (var device in devices.Where(device => device.Name == DeviceInterfacesOutputLst.SelectedItem.ToString())) //selext the chosen device from the listview
{
DeviceID = device.Id;
}
BluetoothDevice = await BluetoothLEDevice.FromIdAsync(DeviceID); //request access to the Device
DeviceAccessStatus x = await BluetoothDevice.RequestAccessAsync(); //wait for the permission
OutputList.Items.Insert(0, "Connection: " + x.ToString() + " - BluetoothLE Device is " + BluetoothDevice.Name);
//Create the service and characteristic values to fill with the chosen device information
GattDeviceService HRservice = null;
GattCharacteristicsResult HRcharacteristics = null;
try //read the device characteristics, if the characteristics are not found, an exception get thrown
{
HRservice = BluetoothDevice.GetGattService(HRserviceGuid);
HRcharacteristics = await HRservice.GetCharacteristicsAsync();
}
catch
{
OutputList.Items.Insert(0, "Chosen device does not support HR service, choose another one");
return;
}
//TFind the characteristics UUID and assign them to the variable
foreach (GattCharacteristic caratteristica in HRcharacteristics.Characteristics.Where(caratteristica => caratteristica.Uuid.Equals(HRMeasurement)))
{
HRreader = caratteristica; //assegno la caratteristica ad HRreader
OutputList.Items.Insert(0, "Heart Rate Monitor characteristic found - Handle: " + HRreader.AttributeHandle.ToString());
}
//check the server port data
try
{
int serverPortInt;
serverPortInt = Int32.Parse(tcpPortText.Text);
serverPort = tcpPortText.Text;
}
catch
{
OutputList.Items.Insert(0, "Invalid TCP Port, using 13000");
tcpPortText.Text = "13000";
serverPort = tcpPortText.Text;
}
if (HRreader == null)//if the HR characteristic in not found, show an error
{
OutputList.Items.Insert(0, "Heart Rate Monitor characteristic not found");
}
else //If the characteristic have been found, start the readings
{
//Requesting notify
//NOTE: we are not allowed to read the value on request, we have to ask the device to be notified when the HR value change
GattCommunicationStatus status = GattCommunicationStatus.ProtocolError; //setting the status as "protocol error", just in case...
OutputList.Items.Insert(0, "Waiting for notify handshake...");
try
{
status = await HRreader.WriteClientCharacteristicConfigurationDescriptorAsync(
GattClientCharacteristicConfigurationDescriptorValue.Notify);
}
catch
{
//f**k, i don't know
}
//We are now ready to receive the informations and send them via TCP
if (status == GattCommunicationStatus.Success)
{
OutputList.Items.Insert(0, "Notify Activated");
OutputList.Items.Insert(0, "Now reading... give me a few seconds");
deviceConnectionState = true;
serverPort = tcpPortText.Text;
OutputList.Items.Insert(0, "Connecting to port " + serverPort);
DispatcherTimerSetup();
read();
}
else
{
if (status == GattCommunicationStatus.ProtocolError)
{
OutputList.Items.Insert(0, "Notify Failed - Protocol Error");
}
if (status == GattCommunicationStatus.Unreachable)
{
OutputList.Items.Insert(0, "Notify Failed - Unreachable");
}
if (status == GattCommunicationStatus.AccessDenied)
{
OutputList.Items.Insert(0, "Notify Failed - Access Denied");
}
OutputList.Items.Insert(0, "Sorry, I'm far from perfect");
}
}
}
else
{
OutputList.Items.Insert(0, "Select a device from the list"); //nel caso in cui non venga selezionato un dispositivo dalla lista
}
}