C# - Tilt Bricklet – Tinkerforge

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# C# - Tilt Bricklet

This is the description of the C# API bindings for the Tilt Bricklet. General information and technical specifications for the Tilt Bricklet are summarized in its hardware description.

An installation guide for the C# API bindings is part of their general description.

## Examples

The example code below is Public Domain (CC0 1.0).

### Simple

Download (ExampleSimple.cs)

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    using Tinkerforge;

    class Example
    {
        private static string HOST = "localhost";
        private static int PORT = 4223;
        private static string UID = "XYZ"; // Change to your UID

        static void Main()
        {
            IPConnection ipcon = new IPConnection(); // Create IP connection
            BrickletTilt tilt = new BrickletTilt(UID, ipcon); // Create device object

            ipcon.Connect(HOST, PORT); // Connect to brickd
            // Don't use device before ipcon is connected

            // Get current tilt state
            byte tiltState = tilt.GetTiltState();

            switch(tiltState)
            {
                case BrickletTilt.TILT_STATE_CLOSED: System.Console.WriteLine("closed"); break;
                case BrickletTilt.TILT_STATE_OPEN: System.Console.WriteLine("open"); break;
                case BrickletTilt.TILT_STATE_CLOSED_VIBRATING: System.Console.WriteLine("closed vibrating"); break;
            }

            System.Console.WriteLine("Press enter to exit");
            System.Console.ReadLine();
            ipcon.Disconnect();
        }
    }

### Callback

Download (ExampleCallback.cs)

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    using Tinkerforge;

    class Example
    {
        private static string HOST = "localhost";
        private static int PORT = 4223;
        private static string UID = "XYZ"; // Change to your UID

        // Callback function for tilt state callback
        static void TiltStateCB(BrickletTilt sender, byte tiltState)
        {
            switch(tiltState)
            {
                case BrickletTilt.TILT_STATE_CLOSED: System.Console.WriteLine("closed"); break;
                case BrickletTilt.TILT_STATE_OPEN: System.Console.WriteLine("open"); break;
                case BrickletTilt.TILT_STATE_CLOSED_VIBRATING: System.Console.WriteLine("closed vibrating"); break;
            }
        }

        static void Main()
        {
            IPConnection ipcon = new IPConnection(); // Create IP connection
            BrickletTilt tilt = new BrickletTilt(UID, ipcon); // Create device object

            ipcon.Connect(HOST, PORT); // Connect to brickd
            // Don't use device before ipcon is connected

            // Enable tilt state callback
            tilt.EnableTiltStateCallback();

            // Register tiltState callback to function TiltStateCB
            tilt.TiltState += TiltStateCB;

            System.Console.WriteLine("Press enter to exit");
            System.Console.ReadLine();
            ipcon.Disconnect();
        }
    }

## API

Generally, every method of the C# bindings that returns a value can throw a `Tinkerforge.TimeoutException`. This exception gets thrown if the device did not respond. If a cable based connection is used, it is unlikely that this exception gets thrown (assuming nobody plugs the device out). However, if a wireless connection is used, timeouts will occur if the distance to the device gets too big.

Since C# does not support multiple return values directly, we use the `out` keyword to return multiple values from a method.

The namespace for all Brick/Bricklet bindings and the IPConnection is `Tinkerforge.*`.

All methods listed below are thread-safe.

### Basic Functions

public class `BrickletTilt`(String uid, IPConnection ipcon)

  Creates an object with the unique device ID `uid`:

      BrickletTilt tilt = new BrickletTilt("YOUR_DEVICE_UID", ipcon);

  This object can then be used after the IP Connection is connected (see examples above).

public byte `GetTiltState`()

  Returns the current tilt state. The state can either be

  - 0 = Closed: The ball in the tilt switch closes the circuit.
  - 1 = Open: The ball in the tilt switch does not close the circuit.
  - 2 = Closed Vibrating: The tilt switch is in motion (rapid change between open and close).

  The following constants are available for this function:

  - BrickletTilt.TILT_STATE_CLOSED = 0
  - BrickletTilt.TILT_STATE_OPEN = 1
  - BrickletTilt.TILT_STATE_CLOSED_VIBRATING = 2

### Advanced Functions

public byte[] `GetAPIVersion`()

  Returns the version of the API definition (major, minor, revision) implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

public bool `GetResponseExpected`(byte functionId)

  Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

  For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by `SetResponseExpected()`. For setter functions it is disabled by default and can be enabled.

  Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is send and errors are silently ignored, because they cannot be detected.

  See `SetResponseExpected()` for the list of function ID constants available for this function.

public void `SetResponseExpected`(byte functionId, bool responseExpected)

  Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled and callbacks it is always disabled.

  Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is send and errors are silently ignored, because they cannot be detected.

  The following function ID constants are available for this function:

  - BrickletTilt.FUNCTION_ENABLE_TILT_STATE_CALLBACK = 2
  - BrickletTilt.FUNCTION_DISABLE_TILT_STATE_CALLBACK = 3

public void `SetResponseExpectedAll`(bool responseExpected)

  Changes the response expected flag for all setter and callback configuration functions of this device at once.

public void `GetIdentity`(out string uid, out string connectedUid, out char position, out byte[] hardwareVersion, out byte[] firmwareVersion, out int deviceIdentifier)

  Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

  The position can be 'a', 'b', 'c' or 'd'.

  The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.

### Callback Configuration Functions

public void `EnableTiltStateCallback`()

  Enables the `TiltState` callback.

public void `DisableTiltStateCallback`()

  Disables the `TiltState` callback.

public bool `IsTiltStateCallbackEnabled`()

  Returns true if the `TiltState` callback is enabled.

### Callbacks

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done by appending your callback handler to the corresponding event:

    void Callback(BrickletTilt sender, int value)
    {
        System.Console.WriteLine("Value: " + value);
    }

    tilt.ExampleCallback += Callback;

The available events are described below.

Note

Using callbacks for recurring events is always preferred compared to using getters. It will use less USB bandwidth and the latency will be a lot better, since there is no round trip time.

public event `TiltState`(BrickletTilt sender, byte state)

  This callback provides the current tilt state. It is called every time the state changes.

  See `GetTiltState()` for a description of the states.

  The following constants are available for this function:

  - BrickletTilt.TILT_STATE_CLOSED = 0
  - BrickletTilt.TILT_STATE_OPEN = 1
  - BrickletTilt.TILT_STATE_CLOSED_VIBRATING = 2

### Constants

public int `DEVICE_IDENTIFIER`

  This constant is used to identify a Tilt Bricklet.

  The `GetIdentity()` function and the `EnumerateCallback` callback of the IP Connection have a `deviceIdentifier` parameter to specify the Brick's or Bricklet's type.

The content of this page is licensed under Creative Commons Attribution 3.0 Unported License.