public GattCharacteristicValueEventArgs(Peripheral peripheral, GattService service, GattCharacteristic characteristic, byte[] value)
{
Peripheral = peripheral;
Service = service;
Characteristic = characteristic;
Value = value;
}
public async Task <IList <GattService> > GetServicesAsync(Peripheral peripheral)
{
var connection = peripheral.Connection;
var itemsTCS = new TaskCompletionSource <IList <GroupFoundEventArgs> >();
var items = new List <GroupFoundEventArgs>();
var onGroupFound = new EventHandler <GroupFoundEventArgs>((s, e) =>
{
if (e.Connection != connection)
{
return;
}
items.Add(e);
});
var onProcedureCompleted = new EventHandler <ProcedureCompletedEventArgs>((s, e) =>
{
if (e.Connection != connection)
{
return;
}
//if (e.ErrorCode == 0)
//{
// itemsTCS.TrySetResult(items);
//}
//else
//{
// var error = new ErrorException(e.ErrorCode);
// itemsTCS.TrySetException(error);
//}
itemsTCS.TrySetResult(items);
});
_messageHub.AttributeClient.GroupFound += onGroupFound;
_messageHub.AttributeClient.ProcedureCompleted += onProcedureCompleted;
try
{
var start = (ushort)0x0001;
var end = (ushort)0xFFFF;
var uuid = (ushort)0x2800;
var uuidValue = BitConverter.GetBytes(uuid);
await _messageHub.AttributeClient.ReadByGroupTypeAsync(connection, start, end, uuidValue);
await itemsTCS.Task;
}
finally
{
_messageHub.AttributeClient.GroupFound -= onGroupFound;
_messageHub.AttributeClient.ProcedureCompleted -= onProcedureCompleted;
}
var services = new List <GattService>();
foreach (var item in items)
{
var uuid = item.UUID.ToUUID();
var service = new GattService(connection, item.Start, item.End, uuid);
services.Add(service);
}
return(services);
}
public async Task <IList <GattCharacteristic> > GetCharacteristicsAsync(GattService service)
{
var connection = service.Connection;
var itemsTCS = new TaskCompletionSource <IList <AttributeValueEventArgs> >();
var items = new List <AttributeValueEventArgs>();
var onAttributeValue = new EventHandler <AttributeValueEventArgs>((s, e) =>
{
if (e.Connection != connection ||
e.Type != AttributeValueType.ReadByType)
{
return;
}
items.Add(e);
});
var onProcedureCompleted = new EventHandler <ProcedureCompletedEventArgs>((s, e) =>
{
if (e.Connection != connection)
{
return;
}
//if (e.ErrorCode == 0)
//{
// itemsTCS.TrySetResult(items);
//}
//else
//{
// var error = new ErrorException(e.ErrorCode);
// itemsTCS.TrySetException(error);
//}
itemsTCS.TrySetResult(items);
});
_messageHub.AttributeClient.AttributeValue += onAttributeValue;
_messageHub.AttributeClient.ProcedureCompleted += onProcedureCompleted;
try
{
var start = service.Start;
var end = service.End;
var uuid = (ushort)0x2803;
var uuidValue = BitConverter.GetBytes(uuid);
await _messageHub.AttributeClient.ReadByTypeAsync(connection, start, end, uuidValue);
await itemsTCS.Task;
}
finally
{
_messageHub.AttributeClient.AttributeValue -= onAttributeValue;
_messageHub.AttributeClient.ProcedureCompleted -= onProcedureCompleted;
}
var peripheral = _peripherals[connection];
var characteristics = new List <GattCharacteristic>();
for (var i = 0; i < items.Count; i++)
{
var item = items[i];
var start = item.AttHandle;
var end = i < items.Count - 1
? (ushort)(items[i + 1].AttHandle - 1)
: service.End;
// BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 3, Part G, Page 1551
var properties = (GattCharacteristicProperty)item.Value[0];
var value = BitConverter.ToUInt16(item.Value, 1);
var uuidValue = new byte[item.Value.Length - 3];
Array.Copy(item.Value, 3, uuidValue, 0, uuidValue.Length);
var uuid = uuidValue.ToUUID();
var characteristic = new GattCharacteristic(connection, start, end, value, uuid, properties);
peripheral.Services[value] = service;
peripheral.Characteristics[value] = characteristic;
characteristics.Add(characteristic);
}
return(characteristics);
}
