/// <summary>
/// Called to send a command to the BTLE device. This is a possible example of how tat would be done but the specifics
/// will be based on device manufacturer specifications.
/// </summary>
/// <param name="commandCharacteristic"></param>
/// <returns></returns>
/// NOTE: Because unity uses the .c# 4.0 spec we don't have direct access to the async / Task functions
/// but we will when running under the runtime as we will be in the WSA space
#if UNITY_WSA_10_0 && !UNITY_EDITOR
internal async Task Send(GattCharacteristicsWrapper commandCharacteristic)
{
byte[] message = new byte[CommandLength];
PopulateBuffer(message);
IBuffer buff = message.AsBuffer();
await commandCharacteristic.Characteristic.WriteValueAsync(buff);
}
/// <summary>
/// Connect to the service and then list out the characteristics looking for our special characteristics by UUID
/// </summary>
/// <returns></returns>
public bool ConnectService()
{
bool connectOk = false;
ShowFeedback("Device service count: " + BTLEDevice.ServiceCount);
ServiceCount = BTLEDevice.ServiceCount;
connectOk = true;
foreach (var service in BTLEDevice.Services)
{
ShowFeedback(service.Name);
if (service.Name.Contains(sService_UUID))
{
GattDeviceService = service;
}
}
if (GattDeviceService != null)
{
ShowFeedback("Service found");
ShowFeedback("Characteristics count: " + GattDeviceService.Characteristics.Count);
int retry = 5;
while (GattDeviceService.Characteristics.Count == 0 && retry > 0)
{
Task.Delay(500);
retry--;
}
if (GattDeviceService.Characteristics.Count == 0)
{
ShowFeedback("Characteristics count: " + GattDeviceService.Characteristics.Count);
}
ShowFeedback("Characteristics count: " + GattDeviceService.Characteristics.Count);
foreach (var characteristic in GattDeviceService.Characteristics)
{
ShowFeedback("Characteristic Name: " + characteristic.Name);
ShowFeedback("Characteristic UUID: " + characteristic.UUID);
string UUID = characteristic.UUID.ToUpper();
// See if this is the command characteristic used for device control
if (UUID.Contains(sCommandCharacteristic))
{
ShowFeedback("Command characteristic found");
CommandCharacteristic = characteristic;
ShowFeedback(CommandCharacteristic.Name);
continue;
}
// See if this is the sensor (optional depending on device) characteristic
if (UUID.Contains(sSensorCharacteristic))
{
ShowFeedback("Sensor characteristic found");
SensorCharacteristic = characteristic;
SensorCharacteristic.Characteristic.ValueChanged += SensorCharacteristic_ValueChanged;
// If you don't call SetNotify you won't get the ValueChanged notifications.
bool notifyOk = SensorCharacteristic.SetNotify();
continue;
}
}
}
return(connectOk);
}
