private static async void Commands()
{
_errorCode = 0;
//Search for polar device
Console.WriteLine(" | Searching device...");
ListDevices();
DeviceInformation tempDevice = null;
while (tempDevice == null)
{
ListDevices();
tempDevice = _deviceList.FirstOrDefault(d => d.Name.Contains("Polar", StringComparison.OrdinalIgnoreCase));
if (tempDevice == null)
{
Thread.Sleep(1000);
}
}
//Connecting to device
Console.WriteLine(" | Connecting...");
_errorCode += await OpenDevice(tempDevice.Name);
//Search for correct service
Console.WriteLine(" | Searching service...");
BluetoothLEAttributeDisplay tempService = null;
while (tempService == null)
{
tempService = _services.FirstOrDefault(d => d.Name.Contains("Heart", StringComparison.OrdinalIgnoreCase));
if (tempService == null)
{
Thread.Sleep(1000);
}
}
Thread.Sleep(1000);
//Subscribing to service
Console.WriteLine(" | Registerring service...");
Console.WriteLine($" > set ");
_errorCode += await SetService(tempService.Name);
Console.WriteLine($" > subs");
_errorCode += await SubscribeToCharacteristic(tempService.Name);
Console.WriteLine(" | Listening...");
}
/// <summary>
/// Set active service for current device
/// </summary>
/// <param name="parameters"></param>
static async Task <int> SetService(string serviceName)
{
int retVal = 0;
if (_selectedDevice != null)
{
if (!string.IsNullOrEmpty(serviceName))
{
string foundName = Utilities.GetIdByNameOrNumber(_services, serviceName);
// If device is found, connect to device and enumerate all services
if (!string.IsNullOrEmpty(foundName))
{
var attr = _services.FirstOrDefault(s => s.Name.Equals(foundName));
IReadOnlyList <GattCharacteristic> characteristics = new List <GattCharacteristic>();
try
{
// Ensure we have access to the device.
var accessStatus = await attr.service.RequestAccessAsync();
if (accessStatus == DeviceAccessStatus.Allowed)
{
// BT_Code: Get all the child characteristics of a service. Use the cache mode to specify uncached characterstics only
// and the new Async functions to get the characteristics of unpaired devices as well.
var result = await attr.service.GetCharacteristicsAsync(BluetoothCacheMode.Uncached);
if (result.Status == GattCommunicationStatus.Success)
{
characteristics = result.Characteristics;
_selectedService = attr;
_characteristics.Clear();
if (!Console.IsInputRedirected)
{
Console.WriteLine($"Selected service {attr.Name}.");
}
if (characteristics.Count > 0)
{
for (int i = 0; i < characteristics.Count; i++)
{
var charToDisplay = new BluetoothLEAttributeDisplay(characteristics[i]);
_characteristics.Add(charToDisplay);
if (!Console.IsInputRedirected)
{
Console.WriteLine($"#{i:00}: {charToDisplay.Name}\t{charToDisplay.Chars}");
}
}
}
else
{
if (!Console.IsOutputRedirected)
{
Console.WriteLine("Service don't have any characteristic.");
}
retVal += 1;
}
}
else
{
if (!Console.IsOutputRedirected)
{
Console.WriteLine("Error accessing service.");
}
retVal += 1;
}
}
// Not granted access
else
{
if (!Console.IsOutputRedirected)
{
Console.WriteLine("Error accessing service.");
}
retVal += 1;
}
}
catch (Exception ex)
{
if (!Console.IsOutputRedirected)
{
Console.WriteLine($"Restricted service. Can't read characteristics: {ex.Message}");
}
retVal += 1;
}
}
else
{
if (!Console.IsOutputRedirected)
{
Console.WriteLine("Invalid service name or number");
}
retVal += 1;
}
}
else
{
if (!Console.IsOutputRedirected)
{
Console.WriteLine("Invalid service name or number");
}
retVal += 1;
}
}
else
{
if (!Console.IsOutputRedirected)
{
Console.WriteLine("Nothing to use, no BLE device connected.");
}
retVal += 1;
}
return(retVal);
}
static async Task <int> OpenDevice(string deviceName)
{
int retVal = 0;
if (!string.IsNullOrEmpty(deviceName))
{
var devs = _deviceList.OrderBy(d => d.Name).Where(d => !string.IsNullOrEmpty(d.Name)).ToList();
string foundId = Utilities.GetIdByNameOrNumber(devs, deviceName);
// If device is found, connect to device and enumerate all services
if (!string.IsNullOrEmpty(foundId))
{
_selectedService = null;
_services.Clear();
try
{
// only allow for one connection to be open at a time
if (_selectedDevice != null)
{
CloseDevice();
}
_selectedDevice = await BluetoothLEDevice.FromIdAsync(foundId).AsTask().TimeoutAfter(_timeout);
if (!Console.IsInputRedirected)
{
Console.WriteLine($"Connecting to {_selectedDevice.Name}.");
}
var result = await _selectedDevice.GetGattServicesAsync(BluetoothCacheMode.Uncached);
if (result.Status == GattCommunicationStatus.Success)
{
if (!Console.IsInputRedirected)
{
Console.WriteLine($"Found {result.Services.Count} services:");
}
for (int i = 0; i < result.Services.Count; i++)
{
var serviceToDisplay = new BluetoothLEAttributeDisplay(result.Services[i]);
_services.Add(serviceToDisplay);
if (!Console.IsInputRedirected)
{
Console.WriteLine($"#{i:00}: {_services[i].Name}");
}
}
}
else
{
Console.WriteLine($"Device {deviceName} is unreachable.");
retVal += 1;
}
}
catch
{
Console.WriteLine($"Device {deviceName} is unreachable.");
retVal += 1;
}
}
else
{
retVal += 1;
}
}
else
{
Console.WriteLine("Device name can not be empty.");
retVal += 1;
}
return(retVal);
}
