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(
$"Dew point: {WeatherHelper.CalculateDewPoint(temp, hum).DegreesCelsius:0.#}\u00B0C");
}
else
{
Console.WriteLine("Error reading DHT sensor");
}
// You must wait some time before trying to read the next value
Thread.Sleep(2000);
}
}
public static void Main(string[] args)
{
Console.WriteLine("Hello DHT!");
// Init DHT10 through I2C
I2cConnectionSettings settings = new I2cConnectionSettings(1, Dht10.DefaultI2cAddress);
I2cDevice device = I2cDevice.Create(settings);
using (Dht10 dht = new Dht10(device))
{
while (true)
{
var tempValue = dht.Temperature;
var humValue = dht.Humidity;
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine(
$"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine(
$"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Thread.Sleep(2000);
}
}
}
private static void ConsoleWriteInfo(Temperature temperature, Ratio relativeHumidity)
{
Console.WriteLine($"Temperature: {temperature.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Humidity: {relativeHumidity.Percent:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(temperature, relativeHumidity).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(temperature, relativeHumidity).DegreesCelsius:0.#}\u00B0C");
}
/// <inheritdoc/>
public override ISensorSample TakeReading(WeatherObservation observation)
{
this.LogTakeReadingStart();
var sensorResult = new SensorSample(this.SensorName);
var result = this.sensor.Read();
if (result.Humidity.HasValue && result.Pressure.HasValue && result.Temperature.HasValue)
{
var pressure = result.Pressure.Value;
var temperature = new Temperature(result.Temperature.Value.DegreesCelsius + this.calibrationOffset, UnitsNet.Units.TemperatureUnit.DegreeCelsius);
var rawTemperature = result.Temperature.Value;
var humidity = result.Humidity.Value;
var actualAltitude = new Length(this.altitudeInMeters, UnitsNet.Units.LengthUnit.Meter);
var calculatedAltitude = WeatherHelper.CalculateAltitude(pressure, WeatherHelper.MeanSeaLevel, rawTemperature);
double absHumidity = WeatherHelper.CalculateAbsoluteHumidity(temperature, humidity).GramsPerCubicMeter;
double dewPoint = WeatherHelper.CalculateDewPoint(temperature, humidity).DegreesCelsius;
double heatIndex = WeatherHelper.CalculateHeatIndex(temperature, humidity).DegreesCelsius;
double vapourPressure = WeatherHelper.CalculateActualVaporPressure(temperature, humidity).Hectopascals;
double barometricPressure = WeatherHelper.CalculateBarometricPressure(pressure, temperature, actualAltitude, humidity).Hectopascals;
double vapourPressureOverIce = WeatherHelper.CalculateSaturatedVaporPressureOverIce(temperature).Hectopascals;
double vapourPressureOverWater = WeatherHelper.CalculateSaturatedVaporPressureOverWater(temperature).Hectopascals;
double seaLevelPressure = WeatherHelper.CalculateSeaLevelPressure(pressure, actualAltitude, temperature).Hectopascals;
sensorResult.AddFinalObservation(temperature.DegreesCelsius, "TEMPERATURE", ObservationUnits.DegreesCelcius);
sensorResult.AddFinalObservation(pressure.Hectopascals, "PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(barometricPressure, "BAROMETRIC PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(seaLevelPressure, "SEA LEVEL PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(vapourPressureOverIce, "OVER ICE PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(vapourPressureOverWater, "OVER WATER PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(humidity.Percent, "RELATIVE HUMIDITY", ObservationUnits.Percentage);
sensorResult.AddFinalObservation(absHumidity, "ABSOLUTE HUMIDITY", ObservationUnits.GramsPerCubicMeter);
sensorResult.AddFinalObservation(vapourPressure, "VAPOUR PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(calculatedAltitude.Meters, "CALCULATED ALTITUDE", ObservationUnits.Meters);
sensorResult.AddFinalObservation(actualAltitude.Meters, "ACTUAL ALTITUDE", ObservationUnits.Meters);
sensorResult.AddFinalObservation(heatIndex, "HEAT INDEX", ObservationUnits.DegreesCelcius);
sensorResult.AddFinalObservation(dewPoint, "DEW POINT", ObservationUnits.DegreesCelcius);
observation.Temperature1 = temperature.DegreesCelsius;
observation.Pressure = pressure.Hectopascals;
observation.BarometricPressure = barometricPressure;
observation.SealevelPressure = seaLevelPressure;
observation.OverIcePressure = vapourPressureOverIce;
observation.OverWaterPressure = vapourPressureOverWater;
observation.RelativeHumidity = humidity.Percent;
observation.AbsoluteHumidity = absHumidity;
observation.ActualAltitude = actualAltitude.Meters;
observation.CalculatedAltitude = calculatedAltitude.Meters;
observation.HeatIndex = heatIndex;
observation.DewPoint = dewPoint;
}
this.LogTakeReadingComplete();
return(sensorResult);
}
public static void Run()
{
using SenseHatTemperatureAndHumidity th = new ();
while (true)
{
var tempValue = th.Temperature;
var humValue = th.Humidity;
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Thread.Sleep(1000);
}
}
public static void Main(string[] args)
{
using (var th = new Hts221(CreateI2cDevice()))
{
while (true)
{
var tempValue = th.Temperature;
var humValue = th.Humidity;
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Thread.Sleep(1000);
}
}
}
private void PiStatusCheck(object sender, ElapsedEventArgs args)
{
try
{
using (var sensor = GetSensor())
{
var temp = sensor.Temperature;
var hum = sensor.Humidity;
if (sensor.IsLastReadSuccessful && CheckDelta(temp, hum))
{
Status.Temp = temp.DegreesFahrenheit;
Status.Humidity = hum.Percent;
Status.HeatIndex = WeatherHelper.CalculateHeatIndex(temp, hum).DegreesFahrenheit;
Status.DewPoint = WeatherHelper.CalculateDewPoint(temp, hum).DegreesFahrenheit;
Status.ErrorsSinceLastUpdate = 0;
Status.TimeSinceLastUpdate = 0;
_logger?.LogInformation(
$"Temperature: {temp.DegreesFahrenheit}\u00B0F, Relative humidity: {hum.Percent}%,"
+ $" Heat index: {Status.HeatIndex:0.#}\u00B0F, Dew point: {Status.DewPoint:0.#}\u00B0F");
}
else
{
Status.ErrorsSinceLastUpdate++;
Status.TimeSinceLastUpdate = Status.ErrorsSinceLastUpdate * 2;
if (Status.ErrorsSinceLastUpdate % 30 == 0)
{
_logger.LogError($"{Status.ErrorsSinceLastUpdate} Errors have occured");
}
}
}
}
catch (Exception e)
{
_logger?.LogError(e, "Exception Occurred While Reading Sensor");
_lifetime?.StopApplication();
}
}
public static void Main(string[] args)
{
I2cConnectionSettings settings = new I2cConnectionSettings(1, Si7021.DefaultI2cAddress);
I2cDevice device = I2cDevice.Create(settings);
using (Si7021 sensor = new Si7021(device, Resolution.Resolution1))
{
while (true)
{
var tempValue = sensor.Temperature;
var humValue = sensor.Humidity;
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Relative humidity: {humValue.Percent:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine();
Thread.Sleep(1000);
}
}
}
/// <summary>
/// Entry point for example program
/// </summary>
/// <param name="args">Command line arguments</param>
public static void Main(string[] args)
{
Console.WriteLine("Hello Bme280!");
// bus id on the raspberry pi 3
const int busId = 1;
// set this to the current sea level pressure in the area for correct altitude readings
var defaultSeaLevelPressure = WeatherHelper.MeanSeaLevel;
var i2cSettings = new I2cConnectionSettings(busId, Bme280.DefaultI2cAddress);
var i2cDevice = I2cDevice.Create(i2cSettings);
var i2CBmpe80 = new Bme280(i2cDevice);
using (i2CBmpe80)
{
while (true)
{
// set higher sampling
i2CBmpe80.TemperatureSampling = Sampling.LowPower;
i2CBmpe80.PressureSampling = Sampling.UltraHighResolution;
i2CBmpe80.HumiditySampling = Sampling.Standard;
// set mode forced so device sleeps after read
i2CBmpe80.SetPowerMode(Bmx280PowerMode.Forced);
// wait for measurement to be performed
var measurementTime = i2CBmpe80.GetMeasurementDuration();
Thread.Sleep(measurementTime);
// read values
i2CBmpe80.TryReadTemperature(out var tempValue);
i2CBmpe80.TryReadPressure(out var preValue);
i2CBmpe80.TryReadHumidity(out var humValue);
// Note that if you already have the pressure value and the temperature, you could also calculate altitude by using
// var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue) which would be more performant.
i2CBmpe80.TryReadAltitude(defaultSeaLevelPressure, out var altValue);
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue.Hectopascals:0.##}hPa");
Console.WriteLine($"Altitude: {altValue:0.##}m");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Thread.Sleep(1000);
// change sampling and filter
i2CBmpe80.TemperatureSampling = Sampling.UltraHighResolution;
i2CBmpe80.PressureSampling = Sampling.UltraLowPower;
i2CBmpe80.HumiditySampling = Sampling.UltraLowPower;
i2CBmpe80.FilterMode = Bmx280FilteringMode.X2;
// set mode forced and read again
i2CBmpe80.SetPowerMode(Bmx280PowerMode.Forced);
// wait for measurement to be performed
measurementTime = i2CBmpe80.GetMeasurementDuration();
Thread.Sleep(measurementTime);
// read values
i2CBmpe80.TryReadTemperature(out tempValue);
i2CBmpe80.TryReadPressure(out preValue);
i2CBmpe80.TryReadHumidity(out humValue);
// Note that if you already have the pressure value and the temperature, you could also calculate altitude by using
// var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue) which would be more performant.
i2CBmpe80.TryReadAltitude(defaultSeaLevelPressure, out altValue);
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue.Hectopascals:0.##}hPa");
Console.WriteLine($"Altitude: {altValue:0.##}m");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Thread.Sleep(5000);
}
}
}
/// <summary>
/// Main entry point for the program.
/// </summary>
public static void Main()
{
Console.WriteLine("Hello BME680!");
// The I2C bus ID on the Raspberry Pi 3.
const int busId = 1;
// set this to the current sea level pressure in the area for correct altitude readings
var defaultSeaLevelPressure = WeatherHelper.MeanSeaLevel;
var i2cSettings = new I2cConnectionSettings(busId, Bme680.DefaultI2cAddress);
var i2cDevice = I2cDevice.Create(i2cSettings);
using (var bme680 = new Bme680(i2cDevice))
{
while (true)
{
// get the time a measurement will take with the current settings
var measurementDuration = bme680.GetMeasurementDuration(bme680.HeaterProfile);
// 10 consecutive measurement with default settings
for (var i = 0; i < 10; i++)
{
// This instructs the sensor to take a measurement.
bme680.SetPowerMode(Bme680PowerMode.Forced);
// wait while measurement is being taken
Thread.Sleep(measurementDuration);
// Print out the measured data
bme680.TryReadTemperature(out var tempValue);
bme680.TryReadPressure(out var preValue);
bme680.TryReadHumidity(out var humValue);
bme680.TryReadGasResistance(out var gasResistance);
var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue);
Console.WriteLine($"Gas resistance: {gasResistance:0.##}Ohm");
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue.Hectopascals:0.##}hPa");
Console.WriteLine($"Altitude: {altValue:0.##}m");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
// when measuring the gas resistance on each cycle it is important to wait a certain interval
// because a heating plate is activated which will heat up the sensor without sleep, this can
// falsify all readings coming from the sensor
Thread.Sleep(1000);
}
// change the settings
bme680.TemperatureSampling = Sampling.HighResolution;
bme680.HumiditySampling = Sampling.UltraHighResolution;
bme680.PressureSampling = Sampling.Skipped;
bme680.ConfigureHeatingProfile(Bme680HeaterProfile.Profile2, 280, 80, 24);
bme680.HeaterProfile = Bme680HeaterProfile.Profile2;
measurementDuration = bme680.GetMeasurementDuration(bme680.HeaterProfile);
// 10 consecutive measurements with custom settings
for (int i = 0; i < 10; i++)
{
// perform the measurement
bme680.SetPowerMode(Bme680PowerMode.Forced);
Thread.Sleep(measurementDuration);
// Print out the measured data
bme680.TryReadTemperature(out var tempValue);
bme680.TryReadPressure(out var preValue);
bme680.TryReadHumidity(out var humValue);
bme680.TryReadGasResistance(out var gasResistance);
var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue);
Console.WriteLine($"Gas resistance: {gasResistance:0.##}Ohm");
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue.Hectopascals:0.##}hPa");
Console.WriteLine($"Altitude: {altValue:0.##}m");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius:0.#}\u00B0C");
Thread.Sleep(1000);
}
// reset will change settings back to default
bme680.Reset();
}
}
}
private void ReadSensor(object state)
{
if (!_debugMode && _bme280 == null)
{
return;
}
var readingOK = true;
if (!_debugMode)
{
try
{
// set mode forced and read again
_bme280.SetPowerMode(Bmx280PowerMode.Forced);
// wait for measurement to be performed
var measurementTime = _bme280.GetMeasurementDuration();
Thread.Sleep(measurementTime);
// read values
_bme280.TryReadTemperature(out var tempValue);
_bme280.TryReadPressure(out var preValue);
_bme280.TryReadHumidity(out var humValue);
var itsRaining = DigitalIOConnector.Instance.ReadRainSensorDetectsRain();
var rainCorrected = false;
if (itsRaining && tempValue.DegreesCelsius >= _maxTemperatureForRain)
{
itsRaining = false;
rainCorrected = true;
_logger.Information("Raining sensor corrected ({Temp}° greater than {MaxTempRain}°)", tempValue.DegreesCelsius, _maxTemperatureForRain);
}
_lastReadingPoint = new Measurement()
{
TimeStamp = DateTime.Now,
Temperature = tempValue.DegreesCelsius,
Pressure = preValue.Hectopascals,
Humidity = humValue.Percent,
DewPoint = WeatherHelper.CalculateDewPoint(tempValue, humValue).DegreesCelsius,
Raining = itsRaining,
RainCorrected = rainCorrected
};
}
catch (Exception ex)
{
readingOK = false;
_lastReadingPoint = null;
_logger.Error(ex, "Error while reading");
}
}
else
{
_lastReadingPoint = new Measurement()
{
TimeStamp = DateTime.Now,
Temperature = (double)_random.Next(1000, 4000) / 100d,
Pressure = (double)_random.Next(95000, 110000) / 100d,
Humidity = (double)_random.Next(5000, 9000) / 100d,
DewPoint = 12.12345d,
Raining = _random.Next(0, 1) == 1
};
}
OnPropertyChanged(readingOK ? "Reading done" : "Reading Error");
}
public void DewPointIsCalculatedCorrectly(double expected, double fahrenheit, double relativeHumidity)
{
var dewPoint = WeatherHelper.CalculateDewPoint(Temperature.FromDegreesFahrenheit(fahrenheit), Ratio.FromPercent(relativeHumidity));
Assert.Equal(expected, Math.Round(dewPoint.DegreesFahrenheit, 2));
}
/// <inheritdoc/>
public override void Initialize()
{
this.LogStartInitialization();
this.i2cDevice = this.Controller.GetI2CConnection(this.DeviceId);
this.sensor = new Bme280(this.i2cDevice)
{
TemperatureSampling = Sampling.LowPower,
PressureSampling = Sampling.UltraHighResolution,
HumiditySampling = Sampling.Standard,
};
var readResult = this.sensor.ReadStatus();
this.LogMessage($"BME280 status {readResult}");
var result = this.sensor.Read();
if (result.Humidity.HasValue && result.Pressure.HasValue && result.Temperature.HasValue)
{
var pressure = result.Pressure.Value;
var temperature = new Temperature(result.Temperature.Value.DegreesCelsius - this.calibrationOffset, UnitsNet.Units.TemperatureUnit.DegreeCelsius);
var humidity = result.Humidity.Value;
var actualAltitude = new Length(this.altitudeInMeters, UnitsNet.Units.LengthUnit.Meter);
var calculatedAltitude = WeatherHelper.CalculateAltitude(pressure, WeatherHelper.MeanSeaLevel, temperature);
double absHumidity = WeatherHelper.CalculateAbsoluteHumidity(temperature, humidity).GramsPerCubicMeter;
double dewPoint = WeatherHelper.CalculateDewPoint(temperature, humidity).DegreesCelsius;
double heatIndex = WeatherHelper.CalculateHeatIndex(temperature, humidity).DegreesCelsius;
double vapourPressure = WeatherHelper.CalculateActualVaporPressure(temperature, humidity).Hectopascals;
double barometricPressure = WeatherHelper.CalculateBarometricPressure(pressure, temperature, actualAltitude, humidity).Hectopascals;
double vapourPressureOverIce = WeatherHelper.CalculateSaturatedVaporPressureOverIce(temperature).Hectopascals;
double vapourPressureOverWater = WeatherHelper.CalculateSaturatedVaporPressureOverWater(temperature).Hectopascals;
double seaLevelPressure = WeatherHelper.CalculateSeaLevelPressure(pressure, actualAltitude, temperature).Hectopascals;
this.LogMessage($"Temperature: {temperature.DegreesCelsius:0.#}\u00B0C");
this.LogMessage($"Pressure: {pressure.Hectopascals:0.##}hPa");
this.LogMessage($"Barometric Pressure: {barometricPressure:0.##}hPa");
this.LogMessage($"Sea level Pressure: {seaLevelPressure:0.##}hPa");
this.LogMessage($"Over ice Pressure: {vapourPressureOverIce:0.##}hPa");
this.LogMessage($"Over water Pressure: {vapourPressureOverWater:0.##}hPa");
this.LogMessage($"Relative humidity: {humidity.Percent:0.#}%");
this.LogMessage($"Absolute humidity: {absHumidity:0.#}g/m3");
this.LogMessage($"Vapour pressure: {vapourPressure:0.#}hPa");
this.LogMessage($"Calculate altitude: {calculatedAltitude.Meters:0.##}m");
this.LogMessage($"Actual altitude: {actualAltitude.Meters:0.##}m");
this.LogMessage($"Heat index: {heatIndex:0.#}\u00B0C");
this.LogMessage($"Dew point: {dewPoint:0.#}\u00B0C");
Thread.Sleep(1000);
// set sane defaults
this.sensor.TemperatureSampling = Sampling.UltraLowPower;
this.sensor.PressureSampling = Sampling.UltraLowPower;
this.sensor.HumiditySampling = Sampling.UltraLowPower;
this.sensor.FilterMode = Bmx280FilteringMode.Off;
this.sensor.SetPowerMode(Iot.Device.Bmxx80.PowerMode.Bmx280PowerMode.Forced);
this.IsInitialized = true;
this.LogStartSuccess();
}
this.LogError("Couldn't read from BME280");
}
/// <inheritdoc/>
public override ISensorSample TakeReading(WeatherObservation observation)
{
this.LogTakeReadingStart();
var sensorResult = new SensorSample(this.SensorName);
// Initialize for reading
this.Device.Write(new byte[] { REGCONTROLHUM, OVERSAMPLEHUM });
var control = GetControlCode();
this.Device.Write(new byte[] { REGCONTROL, (byte)control });
// Read calibaration data
var cal1 = this.ReadBytes(0x88, 24);
var cal2 = this.ReadBytes(0xA1, 1);
var cal3 = this.ReadBytes(0xE1, 7);
sensorResult.AddDiagnostic("Calibration data (1/2/3)");
sensorResult.AddDiagnostic(ByteOperations.PrintByteArray(cal1));
sensorResult.AddDiagnostic(ByteOperations.PrintByteArray(cal2));
sensorResult.AddDiagnostic(ByteOperations.PrintByteArray(cal3));
var calibrationData = ExtractcalibrationData(cal1, cal2, cal3);
// Pause per spec
var wait_time = GetWaitTime();
Thread.Sleep((int)wait_time / 1000);
// Read raw data
var data = this.ReadBytes(REGDATA, 8);
sensorResult.AddDiagnostic("Raw data");
sensorResult.AddDiagnostic(ByteOperations.PrintByteArray(data));
var rawTemp = (data[3] << 12) | (data[4] << 4) | (data[5] >> 4);
double rawTemperature = CalculateTemperature(sensorResult, calibrationData, rawTemp, out double tFine);
// Refine pressure and adjust for temperature
var rawPressure = (data[0] << 12) | (data[1] << 4) | (data[2] >> 4);
double pressureValue = CalculatePressure(sensorResult, calibrationData, rawPressure, tFine);
// Refine humidity
var rawHumidity = (data[6] << 8) | data[7];
double humidityValue = CalculateHumidity(sensorResult, calibrationData, rawHumidity, tFine);
sensorResult.AddFinalObservation(rawTemperature + this.calibrationOffset, "TEMPERATURE", ObservationUnits.DegreesCelcius);
sensorResult.AddFinalObservation(pressureValue, "PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(humidityValue, "HUMIDITY", ObservationUnits.Percentage);
var pressure = new Pressure(pressureValue, UnitsNet.Units.PressureUnit.Hectopascal);
var humidity = new RelativeHumidity(humidityValue, UnitsNet.Units.RelativeHumidityUnit.Percent);
var temperature = new Temperature(rawTemperature, UnitsNet.Units.TemperatureUnit.DegreeCelsius);
var actualAltitude = new Length(this.altitudeInMeters, UnitsNet.Units.LengthUnit.Meter);
var altitudeCalculated = WeatherHelper.CalculateAltitude(pressure);
double absHumidity = WeatherHelper.CalculateAbsoluteHumidity(temperature, humidity).GramsPerCubicMeter;
double dewPoint = WeatherHelper.CalculateDewPoint(temperature, humidity).DegreesCelsius;
double heatIndex = WeatherHelper.CalculateHeatIndex(temperature, humidity).DegreesCelsius;
double vapourPressure = WeatherHelper.CalculateActualVaporPressure(temperature, humidity).Hectopascals;
double barometricPressure = WeatherHelper.CalculateBarometricPressure(pressure, temperature, actualAltitude, humidity).Hectopascals;
double vapourPressureOverIce = WeatherHelper.CalculateSaturatedVaporPressureOverIce(temperature).Hectopascals;
double vapourPressureOverWater = WeatherHelper.CalculateSaturatedVaporPressureOverWater(temperature).Hectopascals;
double seaLevelPressure = WeatherHelper.CalculateSeaLevelPressure(pressure, actualAltitude, temperature).Hectopascals;
sensorResult.AddFinalObservation(temperature.DegreesCelsius + this.calibrationOffset, "TEMPERATURE", ObservationUnits.DegreesCelcius);
sensorResult.AddFinalObservation(pressure.Hectopascals, "PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(barometricPressure, "BAROMETRIC PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(seaLevelPressure, "SEA LEVEL PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(vapourPressureOverIce, "OVER ICE PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(vapourPressureOverWater, "OVER WATER PRESSURE", ObservationUnits.HectoPascal);
sensorResult.AddFinalObservation(humidity.Percent, "RELATIVE HUMIDITY", ObservationUnits.Percentage);
sensorResult.AddFinalObservation(absHumidity, "ABSOLUTE HUMIDITY", ObservationUnits.GramsPerCubicMeter);
sensorResult.AddFinalObservation(vapourPressure, "VAPOUR PRESSURE", ObservationUnits.Percentage);
sensorResult.AddFinalObservation(altitudeCalculated.Meters, "CALCULATED ALTITUDE", ObservationUnits.Meters);
sensorResult.AddFinalObservation(actualAltitude.Meters, "ACTUAL ALTITUDE", ObservationUnits.Meters);
sensorResult.AddFinalObservation(heatIndex, "HEAT INDEX", ObservationUnits.DegreesCelcius);
sensorResult.AddFinalObservation(dewPoint, "DEW POINT", ObservationUnits.DegreesCelcius);
observation.Temperature1 = temperature.DegreesCelsius + this.calibrationOffset;
observation.Pressure = pressure.Hectopascals;
observation.BarometricPressure = barometricPressure;
observation.SealevelPressure = seaLevelPressure;
observation.OverIcePressure = vapourPressureOverIce;
observation.OverWaterPressure = vapourPressureOverWater;
observation.RelativeHumidity = humidity.Percent;
observation.AbsoluteHumidity = absHumidity;
observation.ActualAltitude = actualAltitude.Meters;
observation.CalculatedAltitude = altitudeCalculated.Meters;
observation.HeatIndex = heatIndex;
observation.DewPoint = dewPoint;
this.LogTakeReadingComplete();
return(sensorResult);
}
public static void Main(string[] args)
{
// Sample for each device separately
// LedMatrix.Run();
// Joystick.Run();
// AccelerometerAndGyroscope.Run();
// Magnetometer.Run();
// TemperatureAndHumidity.Run();
// PressureAndTemperature.Run();
// set this to the current sea level pressure in the area for correct altitude readings
var defaultSeaLevelPressure = Pressure.MeanSeaLevel;
using (var sh = new SenseHat())
{
int n = 0;
int x = 3, y = 3;
while (true)
{
Console.Clear();
(int dx, int dy, bool holding) = JoystickState(sh);
if (holding)
{
n++;
}
x = (x + 8 + dx) % 8;
y = (y + 8 + dy) % 8;
sh.Fill(n % 2 == 0 ? Color.DarkBlue : Color.DarkRed);
sh.SetPixel(x, y, Color.Yellow);
var tempValue = sh.Temperature;
var temp2Value = sh.Temperature2;
var preValue = sh.Pressure;
var humValue = sh.Humidity;
var accValue = sh.Acceleration;
var angValue = sh.AngularRate;
var magValue = sh.MagneticInduction;
var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue);
Console.WriteLine($"Temperature Sensor 1: {tempValue.Celsius:0.#}\u00B0C");
Console.WriteLine($"Temperature Sensor 2: {temp2Value.Celsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue:0.##}hPa");
Console.WriteLine($"Altitude: {altValue:0.##}m");
Console.WriteLine($"Acceleration: {sh.Acceleration}g");
Console.WriteLine($"Angular rate: {sh.AngularRate}DPS");
Console.WriteLine($"Magnetic induction: {sh.MagneticInduction}gauss");
Console.WriteLine($"Relative humidity: {humValue:0.#}%");
// WeatherHelper supports more calculations, such as saturated vapor pressure, actual vapor pressure and absolute humidity.
Console.WriteLine($"Heat index: {WeatherHelper.CalculateHeatIndex(tempValue, humValue).Celsius:0.#}\u00B0C");
Console.WriteLine($"Dew point: {WeatherHelper.CalculateDewPoint(tempValue, humValue).Celsius:0.#}\u00B0C");
Thread.Sleep(1000);
}
}
}
