Meadow.Foundation.Sensors.Atmospheric.Ms5611

Ms5611
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The MS5611 is a barometer and temperature sensor that communicates over I2C or SPI up to 20Mhz. Operating range: 10 to 1200 mbar, -40 to +85 °C.

Code Example

Ms5611 sensor;

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

    sensor = new Ms5611(Device.CreateI2cBus());

    var consumer = Ms5611.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 is { } old)
            {
                return (
                (result.New.Temperature.Value - old.Temperature.Value).Abs().Celsius > 0.5
                &&
                (result.New.Pressure.Value - old.Pressure.Value).Millibar > 0.5
                );
            }
            return false;
        }
    );
    sensor.Subscribe(consumer);

    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Temperature: {result.New.Temperature?.Celsius:N2}C");
        Resolver.Log.Info($"  Pressure: {result.New.Pressure?.Millibar:N2}mbar ({result.New.Pressure?.Pascal:N2}Pa)");
    };

    return Task.CompletedTask;
}

public async override Task Run()
{
    var conditions = await sensor.Read();
    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Temperature: {conditions.Temperature?.Celsius:N2}C");
    Resolver.Log.Info($" Pressure: {conditions.Pressure?.Bar:N2}hPa");

    sensor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

Wiring Example

To wire a Ms5611 to your Meadow board, connect the following:

Ms5611	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Class Ms5611

Represents an Ms5611 pressure and temperature sensor

Assembly: Ms5611.dll

View Source

Declaration

public class Ms5611 : PollingSensorBase<(Temperature? Temperature, Pressure? Pressure)>, IObservable<IChangeResult<(Temperature? Temperature, Pressure? Pressure)>>, ISamplingSensor<(Temperature? Temperature, Pressure? Pressure)>, ISensor<(Temperature? Temperature, Pressure? Pressure)>, ITemperatureSensor, ISamplingSensor<Temperature>, ISensor<Temperature>, IBarometricPressureSensor, ISamplingSensor<Pressure>, ISensor<Pressure>, ISensor, ISamplingSensor, II2cPeripheral

Inheritance: System.Object -> Meadow.Foundation.ObservableBase<UNIT>

Implements:

Expand

System.IObservable<Meadow.IChangeResult<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>>, Meadow.Peripherals.Sensors.ISamplingSensor<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>, Meadow.Peripherals.Sensors.ISensor<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>, Meadow.Peripherals.Sensors.ITemperatureSensor, Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Temperature>, Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Temperature>, Meadow.Peripherals.Sensors.Atmospheric.IBarometricPressureSensor, Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Pressure>, Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Pressure>, Meadow.Peripherals.Sensors.ISensor, Meadow.Peripherals.Sensors.ISamplingSensor, Meadow.Hardware.II2cPeripheral

Properties

Temperature

The current temperature

View Source

Declaration

public Temperature? Temperature { get; }

Pressure

The current pressure

View Source

Declaration

public Pressure? Pressure { get; }

DefaultI2cAddress

The default I2C address for the peripheral

View Source

Declaration

public byte DefaultI2cAddress { get; }

Fields

i2cComms

I2C Communication bus used to communicate with the peripheral

View Source

Declaration

protected readonly II2cCommunications i2cComms

Methods

RaiseEventsAndNotify(IChangeResult<(Temperature? Temperature, Pressure? Pressure)>)

Raise events for subscribers and notify of value changes

View Source

Declaration

protected override void RaiseEventsAndNotify(IChangeResult<(Temperature? Temperature, Pressure? Pressure)> changeResult)

Parameters

Type	Name	Description
Meadow.IChangeResult<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>	changeResult	The updated sensor data

ReadSensor()

Reads data from the sensor

View Source

Declaration

protected override Task<(Temperature? Temperature, Pressure? Pressure)> ReadSensor()

Returns

System.Threading.Tasks.Task<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>: The latest sensor reading### Reset() Reset the MS5611

View Source

Declaration

public void Reset()

Implements

• System.IObservable<Meadow.IChangeResult<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>>
• Meadow.Peripherals.Sensors.ISamplingSensor<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>
• Meadow.Peripherals.Sensors.ISensor<System.ValueTuple<System.Nullable<Meadow.Units.Temperature>,System.Nullable<Meadow.Units.Pressure>>>
• Meadow.Peripherals.Sensors.ITemperatureSensor
• Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Temperature>
• Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Temperature>
• Meadow.Peripherals.Sensors.Atmospheric.IBarometricPressureSensor
• Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Pressure>
• Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Pressure>
• Meadow.Peripherals.Sensors.ISensor
• Meadow.Peripherals.Sensors.ISamplingSensor
• Meadow.Hardware.II2cPeripheral