/// <summary>
/// Called when a characteristic changes
/// </summary>
/// <param name="gatt">Gatt</param>
/// <param name="characteristic">Characteristic.</param>
public override void OnCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic)
{
base.OnCharacteristicChanged(gatt, characteristic);
// Setting the last update to be now
lastChange = DateTime.Now;
// If this is one of chars we are tracking
if (notifyChars.Contains(characteristic.Uuid.ToString()))
{
Log.Debug(TAG, "The Characteristic Changed");
// Getting and setting the data
byte[] data = characteristic.GetValue();
handle.updateData(data);
// Notifying
Intent message = new Intent();
message.SetAction(AppUtil.SENSOR_READING_UPDATE_ACTION);
Bundle intentBundle = new Bundle();
intentBundle.PutString(AppUtil.ADDRESS_KEY, gatt.Device.Address);
intentBundle.PutString(AppUtil.DETAIL_KEY, handle.xmlDetail);
message.PutExtras(intentBundle);
SendBroadcast(message);
}
}
/// <summary>
/// Updates the data associated with the sensor
/// </summary>
/// <param name="hr">Hr.</param>
void UpdateData(NSData hr)
{
var now = DateTime.Now;
// A byte array to store data from sensor
byte[] data = new byte[hr.Length];
// Copy data from sensor data to byte array
System.Runtime.InteropServices.Marshal.Copy(hr.Bytes, data, 0, Convert.ToInt32(data.Length));
// Then send to sensor handler for parsing and processing
SensorHandler.updateData(data);
}
public void hexoSkinConnect(BluetoothDevice dev)
{
DateTime lastChange = DateTime.MinValue;
System.Timers.Timer t = new System.Timers.Timer(AppUtil.HEXOSKIN_INTERVAL);
System.Timers.Timer timeOut = new System.Timers.Timer(AppUtil.HEXOSKIN_CONNECT_TIMEOUT);
timeOut.AutoReset = true;
timeOut.Elapsed += delegate {
// Checking if HexoSkin Timed out
TimeSpan duration = DateTime.Now - lastChange;
if (duration.TotalMilliseconds > AppUtil.HEXOSKIN_CONNECT_TIMEOUT)
{
timeOut.Enabled = false;
t.Enabled = false;
// Send disconnect notice
sendStateUpdate(dev.Address, false, "Hexoskin stopped reporting data");
}
timeOut.Interval = AppUtil.SENSOR_CONNECT_TIMEOUT;
};
t.AutoReset = true;
t.Elapsed += async delegate
{
timeOut.Enabled = true;
Log.Debug(LOG_TAG, "Getting hexoskin reading");
try
{
string data = await HTTPSender.getMessage("https://s3.amazonaws.com/pscloud-watchtower/", dev.Name);
// If we got valid data
if (!string.IsNullOrWhiteSpace(data))
{
if (lastChange == DateTime.MinValue)
{
// First time we read data.
sendStateUpdate(dev.Address, true, "Hexoskin started reporting data");
}
lastChange = DateTime.Now;
// Sending data to SensorHandler
Dictionary <string, string> deviceDetails = new Dictionary <string, string>();
deviceDetails.Add("device_name", dev.Name);
// Get the sensor handler
SensorHandler sh = new SensorHandler(deviceDetails, AppConfig.UserID);
byte[] dataArr = Encoding.UTF8.GetBytes(data);
sh.updateData(dataArr);
string xmlDetail = sh.xmlDetail;
Log.Debug(LOG_TAG, xmlDetail);
// Notifying
Intent message = new Intent(AppUtil.SENSOR_READING_UPDATE_ACTION);
Bundle intentBundle = new Bundle();
intentBundle.PutString(AppUtil.ADDRESS_KEY, dev.Address);
intentBundle.PutString(AppUtil.DETAIL_KEY, xmlDetail);
// Get Time last reading was taken
Dictionary <string, string> dataJson = JsonConvert.DeserializeObject <Dictionary <string, string> >(data);
double epochValue;
if (double.TryParse(dataJson["timestamp"], out epochValue))
{
epochValue = epochValue / 256;
DateTime hexoSkinRead = AppUtil.FromUnixTime((long)epochValue);
hexoSkinRead = DateTime.SpecifyKind(hexoSkinRead, DateTimeKind.Utc);
hexoSkinRead = hexoSkinRead.ToLocalTime();
intentBundle.PutString(AppUtil.TIME_KEY, hexoSkinRead.ToString()
);
}
message.PutExtras(intentBundle);
SendBroadcast(message);
}
} catch (Exception ex)
{
Log.Debug(LOG_TAG, "Getting Hexoskin data failed");
}
};
t.Enabled = true;
}
