Meadow.Foundation.Sensors.Environmental.Scd30 1.9.0.5-beta

Meadow.Foundation.Sensors.Environmental.Scd4x

SCD30 I2C C02, temperature, and relative humidity sensor.

The Scd30 library is designed for the Wilderness Labs Meadow .NET IoT platform and is part of Meadow.Foundation.

The Meadow.Foundation peripherals library is an open-source repository of drivers and libraries that streamline and simplify adding hardware to your C# .NET Meadow IoT application.

For more information on developing for Meadow, visit developer.wildernesslabs.co.

To view all Wilderness Labs open-source projects, including samples, visit github.com/wildernesslabs.

Usage

Scd30 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Scd30(i2cBus);

    var consumer = Scd30.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: Temp changed by threshold; new temp: {result.New.Temperature?.Celsius:N2}C, old: {result.Old?.Temperature?.Celsius:N2}C");
        },
        filter: result =>
        {
            if (result.Old?.Temperature is { } oldTemp &&
                result.Old?.Humidity is { } oldHumidity &&
                result.New.Temperature is { } newTemp &&
                result.New.Humidity is { } newHumidity)
            {
                return ((newTemp - oldTemp).Abs().Celsius > 0.5 &&
                        (newHumidity - oldHumidity).Percent > 0.05);
            }
            return false;
        }
    );
    
    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  Concentration: {result.New.Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Temperature: {result.New.Temperature?.Celsius:N1}C");
            Resolver.Log.Info($"  Relative Humidity: {result.New.Humidity:N0}%");
        };
    }
    
    //The value 5 is used purely for demonstration purposes. 2 is the sensor default.
    sensor?.SetMeasurementInterval(5);
    var measurementInterval = sensor?.GetMeasurementInterval();
    Resolver.Log.Info($"Measurement Interval: {measurementInterval}sec");
    
    var autoSelfCalibration = sensor?.SelfCalibrationEnabled();
    Resolver.Log.Info($"Auto Self Calibration: {autoSelfCalibration}");
    
    var ambientPressure = sensor?.GetAmbientPressureOffset();
    Resolver.Log.Info($"Ambient Pressure offset: {ambientPressure}mbar");
    
    var altitudeOffset = sensor?.GetAltitudeOffset();
    Resolver.Log.Info($"Altitude Offset: {altitudeOffset}m");
    
    var temperatureOffset = sensor?.GetTemperatureOffset();
    Resolver.Log.Info($"Temperature Offset: {temperatureOffset}C");
    
    var forceCalibrationValue = sensor?.GetForceCalibrationValue();
    Resolver.Log.Info($"Force Calibration Value: {forceCalibrationValue}");
    
    sensor?.StartUpdating(TimeSpan.FromSeconds(5));

    return base.Initialize();
}

How to Contribute

• Found a bug? Report an issue
• Have a **feature idea or driver request? ** Open a new feature request
• Want to contribute code? Fork the Meadow.Foundation repository and submit a pull request against the develop branch

Need Help?

If you have questions or need assistance, please join the Wilderness Labs community on Slack.