public AccelerometerUtility()
{
adapter.DeviceConnected += Adapter_DeviceConnected;
adapter.DeviceDisconnected += Adapter_DeviceDisconnected;
ble.StateChanged += Ble_StateChanged;
status = ble.IsOn ? AccelerometerStatus.NotConnected : AccelerometerStatus.BluetoothTurnedOff;
}
public async Task Reset()
{
await Stop();
if (characteristic != null)
{
Status = AccelerometerStatus.Connecting;
characteristic.ValueUpdated -= Characteristic_ValueUpdated;
characteristic = null;
}
}
public RecordScreenViewModel(MainContext context) : base(context)
{
rideController = new RideRecorder(Context);
accelerometerStatus = Context.AccelerometerUtility.Status;
status = RecordStatus.NotStarted;
timer = new Timer();
timer.Elapsed += Timer_Elapsed;
timer.Interval = 1000;
Context.AccelerometerUtility.StatusChanged += BleAccelerometerUtility_StatusChanged;
Context.GeoUtility.LocationChanged += GeoUtility_LocationChanged;
}
public async Task TryConnect(Guid?id)
{
if (Status != AccelerometerStatus.NotConnected || id == null)
{
return;
}
Status = AccelerometerStatus.Connecting;
try {
await adapter.ConnectToKnownDeviceAsync(id.Value);
} catch (DeviceConnectionException) {
Status = AccelerometerStatus.NotConnected;
}
}
private void Adapter_DeviceConnected(object sender, DeviceEventArgs e)
{
var device = e.Device;
device.ServicesDiscovered += async(s, ev) => {
string serviceId = "19B10001-E8F2-537E-4F6C-D104768A1214".ToLowerInvariant();
IService service = device.Services
.Where(i => i.Id.ToString().ToLowerInvariant() == serviceId)
.SingleOrDefault();
var characteristics = await service.GetCharacteristicsAsync();
characteristic = characteristics.First();
characteristic.ValueUpdated += Characteristic_ValueUpdated;
Status = AccelerometerStatus.Connected;
};
Status = AccelerometerStatus.Connecting;
device.DiscoverServices();
}
private void Adapter_DeviceDisconnected(object sender, DeviceEventArgs e)
{
Status = AccelerometerStatus.NotConnected;
}
