private static void Main()
{
const ConnectorPin measurePin = ConnectorPin.P1Pin11;
Console.WriteLine("DHT-22 Sample: measure humidity and temperature");
Console.WriteLine();
Console.WriteLine("\tMeasure pin: {0}", measurePin);
Console.WriteLine();
var driver = new MemoryGpioConnectionDriver();
using (var pin = driver.InOut(measurePin))
using (var DhtConnection = new Dht22Connection(pin))
{
int TotalRetries = 0;
double measurements = 0;
int errors = 0;
int sumRetries = 0;
while (!Console.KeyAvailable)
{
DhtData data = null;
try {
data = DhtConnection.GetData();
} catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
TotalRetries += data.AttemptCount - 1;
measurements++;
sumRetries += data.AttemptCount -1;
if (data != null)
Console.WriteLine("{0}: Readings: {1:0.00}% humidity, {2:0.0}°C, Attempts {3}",
DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), data.RelativeHumidity.Percent,
data.Temperature.DegreesCelsius, data.AttemptCount);
else
{
errors++;
Console.WriteLine("Unable to read data\n");
}
Console.WriteLine("\nMeasurements {0:0}, Errors {1}, Error rate {2:0.00}%, ",
measurements, errors, errors / measurements * 100);
Console.WriteLine("TotalRetries {0:0}, Mean retries per sample {1:0.000}\n",
TotalRetries, sumRetries/ measurements);
// DHT 22: producer hints that sample period should be at least 2 seconds
// Test that DhtXxConnection's code enforces the specification, by calling
// for a shorter wait
Timer.Sleep(TimeSpan.FromSeconds(2));
}
}
}
public override void Initialization()
{
logger.Debug("Humidity_Temperature_Air_DHT22|Initialization_00");
try
{
if (!Simulation)
{
logger.Debug("Humidity_Temperature_Air_DHT22|Initialization_05");
MemoryGpioConnectionDriver driver = new MemoryGpioConnectionDriver();
logger.Debug("Humidity_Temperature_Air_DHT22|Initialization_06");
const ConnectorPin measurePin = ConnectorPin.P1Pin11;
logger.Debug("Humidity_Temperature_Air_DHT22|Initialization_07");
IInputOutputBinaryPin pin = driver.InOut(measurePin);
logger.Debug("Humidity_Temperature_Air_DHT22|Initialization_10");
dht22 = new Dht22Connection(pin);
logger.Debug("Humidity_Temperature_Air_DHT22|Initialization_11");
}
else
{
// do nothing
}
// define measurements list
DateTime instant = DateTime.Now;
Measurement t = new Measurement()
{
Value = MinValue,
Unit = "[°C]",
DisplayFormat = "0.00",
SampleTime = instant,
Name = "DHT22-Temperature",
};
LastMeasurements.Add(t);
Measurement rh = new Measurement()
{
Value = MinValue,
Unit = "[RH%]",
DisplayFormat = "0",
SampleTime = instant,
Name = "DHT22-Relative Humidity"
};
LastMeasurements.Add(rh);
}
catch (Exception ex)
{
logger.Error("Humidity_Temperature_Air_DHT22|Initialization_20 " + ex.Message);
}
logger.Debug("Humidity_Temperature_Air_DHT22|Initialization_99");
}