/// <summary>
/// Entry point for example program
/// </summary>
/// <param name="args">Command line arguments</param>
public static void 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
var defaultSeaLevelPressure = Pressure.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($"Temperature: {tempValue.Celsius} \u00B0C");
i2CBmp280.TryReadPressure(out var preValue);
Console.WriteLine($"Pressure: {preValue.Hectopascal} hPa");
i2CBmp280.TryReadAltitude(defaultSeaLevelPressure, out var altValue);
Console.WriteLine($"Altitude: {altValue} m");
Thread.Sleep(1000);
// change sampling rate
i2CBmp280.TemperatureSampling = Sampling.UltraHighResolution;
i2CBmp280.PressureSampling = Sampling.UltraLowPower;
i2CBmp280.FilterMode = Bmx280FilteringMode.X4;
// set mode forced and read again
i2CBmp280.SetPowerMode(Bmx280PowerMode.Forced);
// wait for measurement to be performed
measurementTime = i2CBmp280.GetMeasurementDuration();
Thread.Sleep(measurementTime);
// read values
i2CBmp280.TryReadTemperature(out tempValue);
Console.WriteLine($"Temperature {tempValue.Celsius} \u00B0C");
i2CBmp280.TryReadPressure(out preValue);
Console.WriteLine($"Pressure {preValue.Hectopascal} hPa");
i2CBmp280.TryReadAltitude(defaultSeaLevelPressure, out altValue);
Console.WriteLine($"Altitude: {altValue} m");
Thread.Sleep(5000);
}
}
}
static void Main(string[] args)
{
Console.WriteLine("You are modified");
using Lcd2004 lcdDisplay = new Lcd2004(22, 17, new int[] { 25, 24, 23, 18 });
using Bmp280 tempSensor = new Bmp280(I2cDevice.Create(new I2cConnectionSettings(1, 0x77)));
tempSensor.SetTemperatureSampling(Sampling.UltraHighResolution);
tempSensor.SetPowerMode(Bmx280PowerMode.Normal);
using CancellationTokenSource cts = new CancellationTokenSource();
Task workTask = Task.Run(() => DoWorkAsync(lcdDisplay, tempSensor, cts.Token), cts.Token);
Console.WriteLine("Press Enter to stop the program...");
// Run until user adds input
Console.ReadLine();
cts.Cancel();
workTask.Wait(5000);
lcdDisplay.Clear();
}
private static void TestI2c(ArduinoBoard board)
{
var device = board.CreateI2cDevice(new I2cConnectionSettings(0, Bmp280.DefaultI2cAddress));
var bmp = new Bmp280(device);
bmp.StandbyTime = StandbyTime.Ms250;
bmp.SetPowerMode(Bmx280PowerMode.Normal);
Console.WriteLine("Device open");
while (!Console.KeyAvailable)
{
bmp.TryReadTemperature(out var temperature);
bmp.TryReadPressure(out var pressure);
Console.Write($"\rTemperature: {temperature.DegreesCelsius:F2}°C. Pressure {pressure.Hectopascals:F1} hPa ");
Thread.Sleep(100);
}
bmp.Dispose();
device.Dispose();
Console.ReadKey();
Console.WriteLine();
}
static async Task Main(string[] args)
{
Console.WriteLine("Hello Bmp280!");
//bus id on the raspberry pi 3
const int busId = 1;
//set this to the current sea level pressure in the area for correct altitude readings
const double defaultSeaLevelPressure = 1033.00;
var i2cSettings = new I2cConnectionSettings(busId, Bmp280.DefaultI2cAddress);
var i2cDevice = new UnixI2cDevice(i2cSettings);
var i2CBmp280 = new Bmp280(i2cDevice);
using (i2CBmp280)
{
while (true)
{
////set mode forced so device sleeps after read
i2CBmp280.SetPowerMode(PowerMode.Forced);
//set samplings
i2CBmp280.SetTemperatureSampling(Sampling.UltraLowPower);
i2CBmp280.SetPressureSampling(Sampling.UltraLowPower);
//read values
Temperature tempValue = await i2CBmp280.ReadTemperatureAsync();
Console.WriteLine($"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());
}
}
}
public static void DisplayModes(ArduinoBoard board)
{
const int Gpio2 = 2;
const int MaxMode = 10;
Length stationAltitude = Length.FromMeters(650);
int mode = 0;
var gpioController = board.CreateGpioController();
gpioController.OpenPin(Gpio2);
gpioController.SetPinMode(Gpio2, PinMode.Input);
CharacterDisplay disp = new CharacterDisplay(board);
Console.WriteLine("Display output test");
Console.WriteLine("The button on GPIO 2 changes modes");
Console.WriteLine("Press x to exit");
disp.Output.ScrollUpDelay = TimeSpan.FromMilliseconds(500);
AutoResetEvent buttonClicked = new AutoResetEvent(false);
void ChangeMode(object sender, PinValueChangedEventArgs pinValueChangedEventArgs)
{
mode++;
if (mode > MaxMode)
{
// Don't change back to 0
mode = 1;
}
buttonClicked.Set();
}
gpioController.RegisterCallbackForPinValueChangedEvent(Gpio2, PinEventTypes.Falling, ChangeMode);
var device = board.CreateI2cDevice(new I2cConnectionSettings(0, Bmp280.DefaultI2cAddress));
Bmp280?bmp;
try
{
bmp = new Bmp280(device);
bmp.StandbyTime = StandbyTime.Ms250;
bmp.SetPowerMode(Bmx280PowerMode.Normal);
}
catch (IOException)
{
bmp = null;
Console.WriteLine("BMP280 not available");
}
OpenHardwareMonitor hardwareMonitor = new OpenHardwareMonitor();
hardwareMonitor.EnableDerivedSensors();
TimeSpan sleeptime = TimeSpan.FromMilliseconds(500);
string modeName = string.Empty;
string previousModeName = string.Empty;
int firstCharInText = 0;
while (true)
{
if (Console.KeyAvailable && Console.ReadKey(true).KeyChar == 'x')
{
break;
}
// Default
sleeptime = TimeSpan.FromMilliseconds(500);
switch (mode)
{
case 0:
modeName = "Display ready";
disp.Output.ReplaceLine(1, "Button for mode");
// Just text
break;
case 1:
{
modeName = "Time";
disp.Output.ReplaceLine(1, DateTime.Now.ToLongTimeString());
sleeptime = TimeSpan.FromMilliseconds(200);
break;
}
case 2:
{
modeName = "Date";
disp.Output.ReplaceLine(1, DateTime.Now.ToShortDateString());
break;
}
case 3:
modeName = "Temperature / Barometric Pressure";
if (bmp != null && bmp.TryReadTemperature(out Temperature temp) && bmp.TryReadPressure(out Pressure p2))
{
Pressure p3 = WeatherHelper.CalculateBarometricPressure(p2, temp, stationAltitude);
disp.Output.ReplaceLine(1, string.Format(CultureInfo.CurrentCulture, "{0:s1} {1:s1}", temp, p3));
}
/// <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);
}
}
}
