/// <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()
{
// set this to the current sea level pressure in the area for correct altitude readings
var defaultSeaLevelPressure = WeatherHelper.MeanSeaLevel;
using SenseHatPressureAndTemperature pt = new ();
while (true)
{
var tempValue = pt.Temperature;
var preValue = pt.Pressure;
var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue);
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue.Hectopascals:0.##}hPa");
Console.WriteLine($"Altitude: {altValue:0.##}m");
Thread.Sleep(1000);
}
}
public static void Main(string[] args)
{
// set this to the current sea level pressure in the area for correct altitude readings
var defaultSeaLevelPressure = WeatherHelper.MeanSeaLevel;
using (var th = new Lps25h(CreateI2cDevice()))
{
while (true)
{
var tempValue = th.Temperature;
var preValue = th.Pressure;
var altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue);
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue.Hectopascals:0.##}hPa");
Console.WriteLine($"Altitude: {altValue:0.##}m");
Thread.Sleep(1000);
}
}
}
GetBmp280TemperatureAndPressure()
{
// bus id on the raspberry pi 3 and 4
const int busId = 1;
// set this to the current sea level pressure in the area for correct altitude readings
var defaultSeaLevelPressure = WeatherHelper.MeanSeaLevel;
I2cConnectionSettings i2CSettings = new(busId, Bmx280Base.DefaultI2cAddress);
var i2CDevice = I2cDevice.Create(i2CSettings);
using var i2CBmp280 = new Bmp280(i2CDevice)
{
TemperatureSampling = Sampling.HighResolution,
PressureSampling = Sampling.HighResolution
};
// Perform a synchronous measurement
var readResult = await i2CBmp280.ReadAsync();
var temperature = readResult.Temperature;
Console.WriteLine($"Temperature: {Green($"{readResult.Temperature?.DegreesFahrenheit:0.#}\u00B0F")}");
var pressure = readResult.Pressure;
Console.WriteLine($"Pressure: {Green($"{readResult.Pressure?.Millibars:0.##}mb")}");
if (temperature == null || pressure == null)
{
return(readResult.Temperature?.DegreesFahrenheit, readResult.Pressure?.Millibars);
}
var altitude =
WeatherHelper.CalculateAltitude(pressure.Value, defaultSeaLevelPressure, temperature.Value);
Console.WriteLine($"Calculated Altitude: {Green($"{altitude.Feet:0,000}")}");
return(readResult.Temperature?.DegreesFahrenheit, readResult.Pressure?.Millibars);
}
/// <summary>
/// Calculates the altitude in meters from the specified sea-level pressure.
/// </summary>
/// <param name="seaLevelPressure">
/// Sea-level pressure
/// </param>
/// <returns>
/// Height above sea level
/// </returns>
public Length ReadAltitude(Pressure seaLevelPressure)
{
return(WeatherHelper.CalculateAltitude(ReadPressure(), seaLevelPressure, ReadTemperature()));
}
/// <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();
}
}
}
public void AltitudeIsCalculatedCorrectlyAtMslpAndDefaultTemp(double expected, double hpa)
{
var altitude = WeatherHelper.CalculateAltitude(Pressure.FromHectopascals(hpa));
Assert.Equal(expected, Math.Round(altitude.Meters, 2));
}
public void AltitudeIsCalculatedCorrectly(double expected, double hpa, double seaLevelHpa, double celsius)
{
var altitude = WeatherHelper.CalculateAltitude(Pressure.FromHectopascals(hpa), Pressure.FromHectopascals(seaLevelHpa), Temperature.FromDegreesCelsius(celsius));
Assert.Equal(expected, Math.Round(altitude.Meters, 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");
}
/// <summary>
/// Entry point for example program
/// </summary>
/// <param name="args">Command line arguments</param>
public static void StartBmp(string[] args)
{
Console.WriteLine("Hello Bmp280!");
Length stationHeight = Length.FromMeters(640); // Elevation of the sensor
// bus id on the raspberry pi 3 and 4
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, Bmp280.DefaultI2cAddress);
var i2cDevice = I2cDevice.Create(i2cSettings);
var i2CBmp280 = new Bmp280(i2cDevice);
using (i2CBmp280)
{
while (true)
{
// set higher sampling
i2CBmp280.TemperatureSampling = Sampling.LowPower;
i2CBmp280.PressureSampling = Sampling.UltraHighResolution;
// set mode forced so device sleeps after read
i2CBmp280.SetPowerMode(Bmx280PowerMode.Forced);
// wait for measurement to be performed
var measurementTime = i2CBmp280.GetMeasurementDuration();
Thread.Sleep(measurementTime);
// read values
i2CBmp280.TryReadTemperature(out var tempValue);
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius} \u00B0C");
i2CBmp280.TryReadPressure(out var preValue);
Console.WriteLine($"Pressure: {preValue.Hectopascals} hPa");
// Note that if you already have the pressure value and the temperature, you could also calculate altitude by using
// double altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue) which would be more performant.
i2CBmp280.TryReadAltitude(out var altValue);
Console.WriteLine($"Calculated Altitude: {altValue} m");
Thread.Sleep(1000);
// change sampling rate
i2CBmp280.TemperatureSampling = Sampling.UltraHighResolution;
i2CBmp280.PressureSampling = Sampling.UltraLowPower;
i2CBmp280.FilterMode = Bmx280FilteringMode.X4;
// set mode forced and read again
i2CBmp280.SetPowerMode(Bmx280PowerMode.Forced);
// wait for measurement to be performed
measurementTime = i2CBmp280.GetMeasurementDuration();
Thread.Sleep(measurementTime);
// read values
i2CBmp280.TryReadTemperature(out tempValue);
Console.WriteLine($"Temperature: {tempValue.DegreesCelsius} \u00B0C");
i2CBmp280.TryReadPressure(out preValue);
Console.WriteLine($"Pressure: {preValue.Hectopascals} hPa");
// This time use altitude calculation
altValue = WeatherHelper.CalculateAltitude(preValue, defaultSeaLevelPressure, tempValue);
Console.WriteLine($"Calculated Altitude: {altValue} m");
// Calculate the barometric (corrected) pressure for the local position.
// Change the stationHeight value above to get a correct reading, but do not be tempted to insert
// the value obtained from the formula above. Since that estimates the altitude based on pressure,
// using that altitude to correct the pressure won't work.
var correctedPressure = WeatherHelper.CalculateBarometricPressure(preValue, tempValue, stationHeight);
Console.WriteLine($"Pressure corrected for altitude {stationHeight.Meters} m (with average humidity): {correctedPressure.Hectopascals} hPa");
Thread.Sleep(5000);
}
}
}
public void AltitudeIsCalculatedCorrectlyAtDefaultTemp(double expected, double hpa, double seaLevelHpa)
{
var altitude = WeatherHelper.CalculateAltitude(Pressure.FromHectopascal(hpa), Pressure.FromHectopascal(seaLevelHpa));
Assert.Equal(expected, Math.Round(altitude, 2));
}
/// <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);
}
}
}
