public void NewReading(SensorReading reading)
{
_pending++;
labelPendingUpload.Text = string.Format("{0} readings waiting to be uploaded", _pending);
string text = reading.Watts.ToString("#,0");
if (reading.Sensor == 0)
{
labelOverall.Text = text;
}
else
{
_readings[reading.Sensor] = text;
listViewAppliances.Items.Clear();
foreach (var key in _readings.Keys)
{
listViewAppliances.Items.Add(new ListViewItem(new string[] { key.ToString(), _readings[key] }));
}
}
}
private void SerialReader()
{
DateTime epochStart = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
while (true)
{
try
{
using (SerialPort port = new SerialPort())
{
port.PortName = _comPort;
port.BaudRate = _baudRate;
port.DtrEnable = true;
port.ReadTimeout = 5000;
port.Open();
while (true)
{
try
{
if (_exit)
{
return;
}
string line = port.ReadLine();
//Debug.WriteLine(line);
XDocument doc = XDocument.Parse(line, LoadOptions.None);
var msg = doc.Element("msg");
if (msg != null)
{
SensorReading reading = new SensorReading();
var ch1 = msg.Element("ch1");
if (ch1 != null)
{
reading.Timestamp = (int)(DateTime.UtcNow - epochStart).TotalSeconds;
reading.Sensor = int.Parse(msg.Element("sensor").Value);
reading.Watts = int.Parse(ch1.Element("watts").Value);
var ch2 = msg.Element("ch2");
if (ch2 != null)
{
reading.Watts += int.Parse(ch2.Element("watts").Value);
}
var ch3 = msg.Element("ch3");
if (ch3 != null)
{
reading.Watts += int.Parse(ch3.Element("watts").Value);
}
readings.Enqueue(reading);
Debug.WriteLine("time={0}, sensor={1}, watts={2}", reading.Timestamp, reading.Sensor, reading.Watts);
_statusForm.Invoke(new NewReadingHandler(_statusForm.NewReading), reading);
}
}
}
catch (TimeoutException timeout)
{
//absorb timeouts and try again
}
}
}
}
catch
{
//absorb and never die, but at least pause
Thread.Sleep(3000);
}
}
}
