private static void Dht(DhtBase dht)
{
while (!Console.KeyAvailable)
{
var temp = dht.Temperature;
var hum = dht.Humidity;
// You can only display temperature and humidity if the read is successful otherwise, this will raise an exception as
// both temperature and humidity are NAN
if (dht.IsLastReadSuccessful)
{
Console.WriteLine($"Temperature: {temp.DegreesCelsius}\u00B0C, Relative humidity: {hum.Percent}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine(
$"Heat index: {WeatherHelper.CalculateHeatIndex(temp, hum).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine(
$"Dew point: {WeatherHelper.CalculateDewPoint(temp, hum).DegreesCelsius:0.#}\u00B0C");
}
else
{
Console.WriteLine("Error reading DHT sensor");
}
// You must wait some time before trying to read the next value
Thread.Sleep(2000);
}
}
public override bool Configure(string jsonDeviceConfiguration)
{
var config = DeserializeDeviceConfig <DhtConfiguration>(jsonDeviceConfiguration);
_dht = GetDhtInstance(config);
return(_dht != null);
}
private Measure Read(DhtBase sensor)
{
var measure = new Measure();
var temperature = (float)sensor.Temperature.Celsius;
var humidity = sensor.Humidity;
if (sensor.IsLastReadSuccessful && humidity >= 0.0f && humidity <= 100.0f && temperature > -100.0f && temperature < 150.0f)
{
measure.DateTime = DateTime.Now;
measure.Temperature = temperature;
measure.Humidity = double.IsNaN(humidity) ? null : (float?)humidity;
}
return(measure);
}
//https://github.com/adafruit/Adafruit_Python_DHT/blob/a609d7dcfb2b8208b88498c54a5c099e55159636/Adafruit_DHT/common.py
//def read_retry(sensor, pin, retries=15, delay_seconds=2, platform=None)
static Measure ReadRetry(DhtBase sensor, int retries = 15)
{
var measure = new Measure();
for (var i = 0; i < retries; i++)
{
var temperature = (float)sensor.Temperature.Celsius;
var humidity = sensor.Humidity;
if (sensor.IsLastReadSuccessful && humidity >= 0.0f && humidity <= 100.0f && temperature > -100.0f && temperature < 150.0f)
{
measure.DateTime = DateTime.Now;
measure.Temperature = temperature;
measure.Humidity = double.IsNaN(humidity) ? null : (float?)humidity;
break;
}
Thread.Sleep(DELAY);
}
return(measure);
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup <Startup>();
webBuilder.UseUrls("http://*:80");
})
.UseSystemd()
.ConfigureServices((hostContext, services) =>
{
DhtBase sensor = null;
if (!args.Contains("--fake"))
{
sensor = new Dht22(2);
}
services.AddSingleton(x => new TemperatureSensor(sensor));
services.AddSingleton <TemperatureService>();
services.AddHostedService <TemperatureServiceWorker>();
services.AddHostedService <TemperatureWorker>();
});
public TemperatureSensor(DhtBase sensor)
{
_sensor = sensor;
}
public void Dispose()
{
_dht?.Dispose();
_dht = null;
}
