Remarks
| Hih6130 | |
|---|---|
| Status |  |
| Source code | GitHub |
| Datasheet(s) | GitHub |
| NuGet package |  |
The HIH6130 sensor allows the reading of the relative humidity and temperature via I2C.
Code Example
Hih6130 sensor;
public MeadowApp()
{
Console.WriteLine("Initializing...");
sensor = new Hih6130(Device.CreateI2cBus());
var consumer = Hih6130.CreateObserver(
handler: result =>
{
Console.WriteLine($"Observer: Temp changed by threshold; new temp: {result.New.Temperature?.Celsius:N2}C, old: {result.Old?.Temperature?.Celsius:N2}C");
},
filter: result =>
{
//c# 8 pattern match syntax. checks for !null and assigns var.
if (result.Old?.Temperature is { } oldTemp &&
result.Old?.Humidity is { } oldHumidity &&
result.New.Temperature is { } newTemp &&
result.New.Humidity is { } newHumidity)
{
return ((newTemp - oldTemp).Abs().Celsius > 0.5 &&
(newHumidity - oldHumidity).Percent > 0.05);
}
return false;
}
);
sensor.Subscribe(consumer);
sensor.Updated += (sender, result) =>
{
Console.WriteLine($" Temperature: {result?.New.Temperature?.Celsius:F1}°C");
Console.WriteLine($" Relative Humidity: {result?.New.Humidity?.Percent:F1}%");
};
ReadConditions().Wait();
sensor.StartUpdating(TimeSpan.FromSeconds(1));
}
async Task ReadConditions()
{
var result = await sensor.Read();
Console.WriteLine("Initial Readings:");
Console.WriteLine($" Temperature: {result.Temperature?.Celsius:F1}°C");
Console.WriteLine($" Relative Humidity: {result.Humidity:F1}%");
}
Sample project(s) available on GitHub
Wiring Example
The HIH6130 requires only four connections between Meadow and the breakout board.
| Meadow Pin | Sensor Pin | Wire Color |
|---|---|---|
| 3.3V | Vcc | Red |
| GND | GND | Black |
| SC | SCK | Blue |
| SD | SDC | White |
Syntax
public class Hih6130 : ByteCommsSensorBase<(Units.Temperature? Temperature, RelativeHumidity? Humidity)>, IDisposable, ITemperatureSensor, IHumiditySensorConstructors
Hih6130(II2cBus, Byte)
Create a new HIH6130 object using the default parameters for the component.
Declaration
public Hih6130(II2cBus i2cBus, byte address = null)Parameters
| Type | Name | Description |
|---|---|---|
| II2cBus | i2cBus | I2C bus (default = 100 KHz). |
| System.Byte | address | Address of the HIH6130 (default = 0x27). |
Properties
Humidity
The humidity, in percent relative humidity, from the last reading..
Declaration
public RelativeHumidity? Humidity { get; }Property Value
| Type | Description |
|---|---|
| System.Nullable<RelativeHumidity> |
Temperature
The temperature, from the last reading.
Declaration
public Units.Temperature? Temperature { get; }Property Value
| Type | Description |
|---|---|
| System.Nullable<Units.Temperature> |
Methods
RaiseEventsAndNotify(IChangeResult<(Nullable<Units.Temperature> Temperature, Nullable<RelativeHumidity> Humidity)>)
Inheritance-safe way to raise events and notify observers.
Declaration
protected override void RaiseEventsAndNotify(IChangeResult<(Units.Temperature? Temperature, RelativeHumidity? Humidity)> changeResult)Parameters
| Type | Name | Description |
|---|---|---|
| IChangeResult<System.ValueTuple<System.Nullable<Units.Temperature>, System.Nullable<RelativeHumidity>>> | changeResult |
ReadSensor()
Force the sensor to make a reading and update the relevant properties.
Declaration
protected override Task<(Units.Temperature? Temperature, RelativeHumidity? Humidity)> ReadSensor()Returns
| Type | Description |
|---|---|
| Task<System.ValueTuple<System.Nullable<Units.Temperature>, System.Nullable<RelativeHumidity>>> |
Overrides
Meadow.Foundation.SensorBase<System.ValueTuple<System.Nullable<Units.Temperature>, System.Nullable<RelativeHumidity>>>.ReadSensor()
Events
HumidityUpdated
Declaration
public event EventHandler<IChangeResult<RelativeHumidity>> HumidityUpdatedEvent Type
| Type | Description |
|---|---|
| EventHandler<IChangeResult<RelativeHumidity>> |
TemperatureUpdated
Declaration
public event EventHandler<IChangeResult<Units.Temperature>> TemperatureUpdatedEvent Type
| Type | Description |
|---|---|
| EventHandler<IChangeResult<Units.Temperature>> |