static async Task DoWorkAsync(Lcd2004 lcd, Bmp280 sensor, CancellationToken token)
{
string currentTemp = "Current temp:";
while (!token.IsCancellationRequested)
{
lcd.Clear();
try
{
Temperature temp = await sensor.ReadTemperatureAsync();
lcd.Write(currentTemp);
lcd.SetCursorPosition(0, 1);
lcd.Write($"{temp.Celsius.ToString("0.00")} degrees");
}
catch (Exception e)
{
Console.WriteLine("Error when attempting to read the Bme280 sensor:");
Console.WriteLine($" {e.Message}");
Console.WriteLine($" {e.StackTrace}");
}
Thread.Sleep(1000);
}
}
static async Task Main(string[] args)
{
Console.WriteLine("Hello Bmp280!");
//bus id on the raspberry pi 3
const int busId = 1;
//set this to the current sea level pressure in the area for correct altitude readings
const double defaultSeaLevelPressure = 1033.00;
var i2cSettings = new I2cConnectionSettings(busId, Bmp280.DefaultI2cAddress);
var i2cDevice = new UnixI2cDevice(i2cSettings);
var i2CBmp280 = new Bmp280(i2cDevice);
using (i2CBmp280)
{
while (true)
{
////set mode forced so device sleeps after read
i2CBmp280.SetPowerMode(PowerMode.Forced);
//set samplings
i2CBmp280.SetTemperatureSampling(Sampling.UltraLowPower);
i2CBmp280.SetPressureSampling(Sampling.UltraLowPower);
//read values
Temperature tempValue = await i2CBmp280.ReadTemperatureAsync();
Console.WriteLine($"Temperature {tempValue.Celsius}");
double preValue = await i2CBmp280.ReadPressureAsync();
Console.WriteLine($"Pressure {preValue}");
double altValue = await i2CBmp280.ReadAltitudeAsync(defaultSeaLevelPressure);
Console.WriteLine($"Altitude: {altValue}");
Thread.Sleep(1000);
//set higher sampling
i2CBmp280.SetTemperatureSampling(Sampling.LowPower);
Console.WriteLine(i2CBmp280.ReadTemperatureSampling());
i2CBmp280.SetPressureSampling(Sampling.UltraHighResolution);
Console.WriteLine(i2CBmp280.ReadPressureSampling());
//set mode forced and read again
i2CBmp280.SetPowerMode(PowerMode.Forced);
//read values
tempValue = await i2CBmp280.ReadTemperatureAsync();
Console.WriteLine($"Temperature {tempValue.Celsius}");
preValue = await i2CBmp280.ReadPressureAsync();
Console.WriteLine($"Pressure {preValue}");
altValue = await i2CBmp280.ReadAltitudeAsync(defaultSeaLevelPressure);
Console.WriteLine($"Altitude: {altValue}");
Thread.Sleep(5000);
//set sampling to higher
i2CBmp280.SetTemperatureSampling(Sampling.UltraHighResolution);
Console.WriteLine(i2CBmp280.ReadTemperatureSampling());
i2CBmp280.SetPressureSampling(Sampling.UltraLowPower);
Console.WriteLine(i2CBmp280.ReadPressureSampling());
}
}
}