private static async Task <Weather> GetWeatherAsync()
{
I2cConnectionSettings settings = new I2cConnectionSettings(0, Bme280.SecondaryI2cAddress);
I2cDevice device = I2cDevice.Create(settings);
using Bme280 bme = new Bme280(device);
bme.SetPowerMode(Bmx280PowerMode.Normal);
bme.SetTemperatureSampling(Sampling.UltraHighResolution);
bme.SetPressureSampling(Sampling.UltraHighResolution);
bme.SetHumiditySampling(Sampling.UltraHighResolution);
double t = Math.Round((await bme.ReadTemperatureAsync()).Celsius, 2);
double h = Math.Round(await bme.ReadHumidityAsync(), 2);
double p = Math.Round(await bme.ReadPressureAsync(), 2);
bme.SetPowerMode(Bmx280PowerMode.Sleep);
//Console.WriteLine($"Temperature:{t} Humidity:{h} Pressure:{p}");
return(new Weather
{
DateTime = DateTime.Now,
WeatherName = await WeatherHelper.GetXinzhiWeatherAsync(ConfigHelper.Get("Xinzhi:Key"), ConfigHelper.Get("Xinzhi:Location")),
Temperature = t,
Humidity = h,
Pressure = p,
ImageBase64 = GetImageBase64()
});
}
/// <summary>
/// Method handler that will return the current temperature and pressure information.
/// </summary>
/// <param name="methodRequest">The request that was sent from the server.</param>
/// <param name="userContext">The user context.</param>
/// <returns></returns>
public async Task <MethodResponse> GetTemperatureAndPreassure(MethodRequest methodRequest, object userContext)
{
// Print message to the console of the message that was received.
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"Getting a request from Hub for temperature and preassure info.");
Console.ResetColor();
// Get temperature and preassure data.
Temperature temp = await _temperatureSensor.ReadTemperatureAsync();
double pressure = await _temperatureSensor.ReadPressureAsync();
// Print message to the console of the data.
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"Temperature in degrees Fahrenheit: {temp.Fahrenheit}");
Console.WriteLine($"Preassure in Pascals: {pressure}");
Console.ResetColor();
// Construct the response object.
var result = new TemperatureData {
TemperatureInFahrenheit = temp.Fahrenheit, PreassureInPascals = pressure
};
var resultString = JsonConvert.SerializeObject(result);
return(new MethodResponse(Encoding.UTF8.GetBytes(resultString), 200));
}
public async Task <double> GetPressure()
{
using (var sensor = new Bme280(_bmp280))
{
sensor.SetPowerMode(PowerMode.Forced);
double pressure = await sensor.ReadPressureAsync();
var temp = await sensor.ReadTemperatureAsync();
var alt = await sensor.ReadAltitudeAsync(pressure);
double humid = await sensor.ReadHumidityAsync();
_logger.LogDebug(
$"Pressure value: {pressure}; PowerMode: {sensor.ReadPowerMode()}; Temperature: {temp.Celsius}; Altitude: {alt}; Humidity: {humid}");
return(pressure);
}
}
public ISensorReading ReadSensor()
{
var result = new HumidityTemperatureAltitudePressureReading();
using (_sensor)
{
_sensor.SetPowerMode(Bmx280PowerMode.Forced);
//set samplings
_sensor.SetTemperatureSampling(Sampling.UltraLowPower);
_sensor.SetPressureSampling(Sampling.UltraLowPower);
_sensor.SetHumiditySampling(Sampling.UltraLowPower);
result.Humidity = _sensor.ReadHumidityAsync().Result;
result.Temperature = _sensor.ReadTemperatureAsync().Result;
result.Altitude = _sensor.ReadAltitudeAsync(defaultSeaLevelPressure).Result;
result.Pressure = _sensor.ReadPressureAsync().Result;
}
return(result);
}
static async Task Main(string[] args)
{
// bus id on the raspberry pi 3
const int busId = 1;
// Setup i2C device (BME280)
var i2cSettings = new I2cConnectionSettings(busId, Bme280.DefaultI2cAddress);
var i2cDevice = I2cDevice.Create(i2cSettings);
var i2CBmpe80 = new Bme280(i2cDevice);
using (i2CBmpe80)
{
while (true)
{
// set mode forced so device sleeps after read
i2CBmpe80.SetPowerMode(Bmx280PowerMode.Forced);
// Get sampling accuracy
i2CBmpe80.SetHumiditySampling(Sampling.Standard);
i2CBmpe80.SetTemperatureSampling(Sampling.Standard);
i2CBmpe80.SetPressureSampling(Sampling.Standard);
// Get variables
Iot.Units.Temperature tempValue = await i2CBmpe80.ReadTemperatureAsync();
double humValue = await i2CBmpe80.ReadHumidityAsync();
double preValue = await i2CBmpe80.ReadPressureAsync();
// Print to screen
Console.WriteLine($"Weather at time: {DateTime.Now}");
Console.WriteLine($"Temperature: {tempValue.Celsius:0.#}\u00B0C");
Console.WriteLine($"Pressure: {preValue/100:0.##}hPa");
Console.WriteLine($"Relative humidity: {humValue:0.#}%\n");
Thread.Sleep(2000);
}
}
}
static async Task Main(string[] args)
{
Console.WriteLine("Hello Bme280!");
//bus id on the raspberry pi 3
const int busId = 1;
//set this to the current sea level pressure in the area for correct altitude readings
const double defaultSeaLevelPressure = 1033.00;
var i2cSettings = new I2cConnectionSettings(busId, Bme280.DefaultI2cAddress);
var i2cDevice = new UnixI2cDevice(i2cSettings);
var i2CBmpe80 = new Bme280(i2cDevice);
using (i2CBmpe80)
{
while (true)
{
////set mode forced so device sleeps after read
i2CBmpe80.SetPowerMode(PowerMode.Forced);
//set samplings
i2CBmpe80.SetTemperatureSampling(Sampling.UltraLowPower);
i2CBmpe80.SetPressureSampling(Sampling.UltraLowPower);
//read values
Temperature tempValue = await i2CBmpe80.ReadTemperatureAsync();
Console.WriteLine($"Temperature {tempValue.Celsius}");
double preValue = await i2CBmpe80.ReadPressureAsync();
Console.WriteLine($"Pressure {preValue}");
double altValue = await i2CBmpe80.ReadAltitudeAsync(defaultSeaLevelPressure);
Console.WriteLine($"Altitude: {altValue}");
Thread.Sleep(1000);
//set higher sampling
i2CBmpe80.SetTemperatureSampling(Sampling.LowPower);
Console.WriteLine(i2CBmpe80.ReadTemperatureSampling());
i2CBmpe80.SetPressureSampling(Sampling.UltraHighResolution);
Console.WriteLine(i2CBmpe80.ReadPressureSampling());
//set mode forced and read again
i2CBmpe80.SetPowerMode(PowerMode.Forced);
//read values
tempValue = await i2CBmpe80.ReadTemperatureAsync();
Console.WriteLine($"Temperature {tempValue}");
preValue = await i2CBmpe80.ReadPressureAsync();
Console.WriteLine($"Pressure {preValue}");
altValue = await i2CBmpe80.ReadAltitudeAsync(defaultSeaLevelPressure);
Console.WriteLine($"Altitude: {altValue}");
Thread.Sleep(5000);
//set sampling to higher
i2CBmpe80.SetTemperatureSampling(Sampling.UltraHighResolution);
Console.WriteLine(i2CBmpe80.ReadTemperatureSampling());
i2CBmpe80.SetPressureSampling(Sampling.UltraLowPower);
Console.WriteLine(i2CBmpe80.ReadPressureSampling());
}
}
}