/// <summary>
/// This is the event handler that runs every time the Arduino sends a new message.
/// It parses the message to an array and sends the values to both the graph
/// and the SaMi object.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Characteristic_ValueUpdated(object sender, Plugin.BLE.Abstractions.EventArgs.CharacteristicUpdatedEventArgs e)
{
string valueString = Encoding.Default.GetString(e.Characteristic.Value);
int count = valueString.Length - valueString.Replace(",", "").Length;
if (count != 5 || valueString[0] == ',')
{
return;
}
double[] values;
/*This part is wrapped in a try/catch because BLE messages can be a bit jumbled when
* connection has just been established. Jumbled message won't parse, of course,
* so they get skipped.*/
try
{
values = Array.ConvertAll(valueString.Split(','), Double.Parse);
}
catch
{
return;
}
SenProReading newReading = new SenProReading {
DateTime = DateTime.Now, Values = values
};
double dateTimePlot = DateTimeAxis.ToDouble(newReading.DateTime);
(plot.Model.Series[0] as LineSeries).Points.Add(new DataPoint(dateTimePlot, newReading.Values[0]));
(plot.Model.Series[1] as LineSeries).Points.Add(new DataPoint(dateTimePlot, newReading.Values[1]));
(plot.Model.Series[2] as LineSeries).Points.Add(new DataPoint(dateTimePlot, newReading.Values[2]));
(plot.Model.Series[3] as LineSeries).Points.Add(new DataPoint(dateTimePlot, newReading.Values[3]));
(plot.Model.Series[4] as LineSeries).Points.Add(new DataPoint(dateTimePlot, newReading.Values[4]));
(plot.Model.Series[5] as LineSeries).Points.Add(new DataPoint(dateTimePlot, newReading.Values[5]));
if ((plot.Model.Series[0] as LineSeries).Points.Count > 15)
{
(plot.Model.Series[0] as LineSeries).Points.RemoveAt(0);
(plot.Model.Series[1] as LineSeries).Points.RemoveAt(0);
(plot.Model.Series[2] as LineSeries).Points.RemoveAt(0);
(plot.Model.Series[3] as LineSeries).Points.RemoveAt(0);
(plot.Model.Series[4] as LineSeries).Points.RemoveAt(0);
(plot.Model.Series[5] as LineSeries).Points.RemoveAt(0);
}
plot.Model.Axes[0].Maximum = DateTimeAxis.ToDouble(newReading.DateTime.AddSeconds(2));
plot.Model.Axes[0].Minimum = DateTimeAxis.ToDouble(newReading.DateTime.AddSeconds(-8));
samiClient.AddMeasurement(newReading);
if (samiClient.MeasurementMinuteCheck())
{
samiClient.SaveResults();
}
Device.BeginInvokeOnMainThread(() =>
{
plot.InvalidatePlot();
});
}
/// <summary>
/// This makes a MeasurementModel based on the current timestamp, consisting of the sensor readings
/// done on that specific time.
/// </summary>
/// <param name="readingInput"></param>
public void AddMeasurement(SenProReading readingInput)
{
MeasurementModel m = new MeasurementModel()
{
Object = "Halax Prototype",
Tag = modelTag,
Timestamp = readingInput.DateTime
};
DataModel sensorOne = new DataModel()
{
Tag = "Sensor 1",
Value = readingInput.Values[0]
};
DataModel sensorTwo = new DataModel()
{
Tag = "Sensor 2",
Value = readingInput.Values[1]
};
DataModel sensorThree = new DataModel()
{
Tag = "Sensor 3",
Value = readingInput.Values[2]
};
DataModel sensorFour = new DataModel()
{
Tag = "Sensor 4",
Value = readingInput.Values[3]
};
DataModel sensorFive = new DataModel()
{
Tag = "Sensor 5",
Value = readingInput.Values[4]
};
DataModel sensorSix = new DataModel()
{
Tag = "Sensor 6",
Value = readingInput.Values[5]
};
m.Data = new DataModel[6];
m.Data[0] = sensorOne;
m.Data[1] = sensorTwo;
m.Data[2] = sensorThree;
m.Data[3] = sensorFour;
m.Data[4] = sensorFive;
m.Data[5] = sensorSix;
measurements.Add(m);
}
