Remarks
| SF-SR02 | |
|---|---|
| Status | Not working |
| Source code | GitHub |
| NuGet package | Not published |
The SF-SR02 ultrasonic sensor uses sonar to determine distance to an object (like bats). It offers excellent non-contact range detection with high accuracy and stable readings in an easy-to-use package.
Sample projects available on GitHub
| Characteristic | Locus |
|---|---|
| Inheritance | System.Object > Sfsr02 |
| Namespace | Meadow.Foundation.Sensors.Distance |
| Assembly | SFSR02.dll |
Syntax
public class Sfsr02 : IRangeFinderConstructors
Sfsr02(IBiDirectionalPort)
Create a new SFSR02 object
Declaration
public Sfsr02(IBiDirectionalPort triggerEchoPort)Parameters
| Type | Name | Description |
|---|---|---|
| IBiDirectionalPort | triggerEchoPort |
Sfsr02(IIODevice, IPin)
Create a new SFSR02 object with an IO Device
Declaration
public Sfsr02(IIODevice device, IPin triggerEchoPin)Parameters
| Type | Name | Description |
|---|---|---|
| IIODevice | device | |
| IPin | triggerEchoPin |
Fields
tickStart
Declaration
protected long tickStartField Value
| Type | Description |
|---|---|
| System.Int64 |
triggerEchoPort
Trigger/Echo Pin
Declaration
protected IBiDirectionalPort triggerEchoPortField Value
| Type | Description |
|---|---|
| IBiDirectionalPort |
Properties
Conditions
Declaration
public DistanceConditions Conditions { get; }Property Value
| Type | Description |
|---|---|
| DistanceConditions |
CurrentDistance
Returns current distance detected in cm.
Declaration
public float CurrentDistance { get; }Property Value
| Type | Description |
|---|---|
| System.Single |
MaximumDistance
Maximum valid distance in cm (CurrentDistance returns -1 if above).
Declaration
public float MaximumDistance { get; }Property Value
| Type | Description |
|---|---|
| System.Single |
MinimumDistance
Minimum valid distance in cm (CurrentDistance returns -1 if below).
Declaration
public float MinimumDistance { get; }Property Value
| Type | Description |
|---|---|
| System.Single |
Methods
MeasureDistance()
Sends a trigger signal
Declaration
public void MeasureDistance()Subscribe(IObserver<DistanceConditionChangeResult>)
Declaration
public IDisposable Subscribe(IObserver<DistanceConditionChangeResult> observer)Parameters
| Type | Name | Description |
|---|---|---|
| System.IObserver<DistanceConditionChangeResult> | observer |
Returns
| Type | Description |
|---|---|
| System.IDisposable |
Events
DistanceDetected
Raised when an received a rebound trigger signal
Declaration
public event EventHandler<DistanceEventArgs> DistanceDetectedEvent Type
| Type | Description |
|---|---|
| System.EventHandler<DistanceEventArgs> |
Updated
Declaration
public event EventHandler<DistanceConditionChangeResult> UpdatedEvent Type
| Type | Description |
|---|---|
| System.EventHandler<DistanceConditionChangeResult> |