Visual Basic .NET - Solid State Relay Bricklet¶

Simple¶

Download (ExampleSimple.vb)

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Imports System
Imports System.Threading
Imports Tinkerforge

Module ExampleSimple
    Const HOST As String = "localhost"
    Const PORT As Integer = 4223
    Const UID As String = "XYZ" ' Change XYZ to the UID of your Solid State Relay Bricklet

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim ssr As New BrickletSolidStateRelay(UID, ipcon) ' Create device object

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

        ' Turn relay on/off 10 times with 1 second delay
        Dim i As Integer
        For i = 0 To 4
            Thread.Sleep(1000)
            ssr.SetState(True)
            Thread.Sleep(1000)
            ssr.SetState(False)
        Next i

        Console.WriteLine("Press key to exit")
        Console.ReadLine()
        ipcon.Disconnect()
    End Sub
End Module

Basic Functions¶

Class BrickletSolidStateRelay(ByVal uid As String, ByVal ipcon As IPConnection)¶

Creates an object with the unique device ID uid:

Dim solidStateRelay As New BrickletSolidStateRelay("YOUR_DEVICE_UID", ipcon)

This object can then be used after the IP Connection is connected.

Sub BrickletSolidStateRelay.SetState(ByVal state As Boolean)¶

Parameters:	state – Type: Boolean, Default: false

Sets the state of the relays true means on and false means off.

A running monoflop timer will be aborted if this function is called.

Function BrickletSolidStateRelay.GetState() As Boolean¶

Returns:	state – Type: Boolean, Default: false

Returns the state of the relay, true means on and false means off.

Advanced Functions¶

Sub BrickletSolidStateRelay.SetMonoflop(ByVal state As Boolean, ByVal time As Long)¶

Parameters:	state – Type: Boolean time – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1]

The first parameter is the desired state of the relay (true means on and false means off). The second parameter indicates the time that the relay should hold the state.

If this function is called with the parameters (true, 1500): The relay will turn on and in 1.5s it will turn off again.

A monoflop can be used as a failsafe mechanism. For example: Lets assume you have a RS485 bus and a Solid State Relay Bricklet connected to one of the slave stacks. You can now call this function every second, with a time parameter of two seconds. The relay will be on all the time. If now the RS485 connection is lost, the relay will turn off in at most two seconds.

Sub BrickletSolidStateRelay.GetMonoflop(ByRef state As Boolean, ByRef time As Long, ByRef timeRemaining As Long)¶

Output Parameters:	state – Type: Boolean time – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1] timeRemaining – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1]

Returns the current state and the time as set by SetMonoflop() as well as the remaining time until the state flips.

If the timer is not running currently, the remaining time will be returned as 0.

Sub BrickletSolidStateRelay.GetIdentity(ByRef uid As String, ByRef connectedUid As String, ByRef position As Char, ByRef hardwareVersion() As Byte, ByRef firmwareVersion() As Byte, ByRef deviceIdentifier As Integer)¶

Output Parameters:

uid – Type: String, Length: up to 8 connectedUid – Type: String, Length: up to 8 position – Type: Char, Range: ["a"C to "h"C, "z"C] hardwareVersion – Type: Byte Array, Length: 3 0: major – Type: Byte, Range: [0 to 255] 1: minor – Type: Byte, Range: [0 to 255] 2: revision – Type: Byte, Range: [0 to 255] firmwareVersion – Type: Byte Array, Length: 3 0: major – Type: Byte, Range: [0 to 255] 1: minor – Type: Byte, Range: [0 to 255] 2: revision – Type: Byte, Range: [0 to 255] deviceIdentifier – Type: Integer, Range: [0 to 216 - 1]

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', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an Isolator Bricklet is always at position 'z'.

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

Callbacks¶

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done by assigning a procedure to an callback property of the device object:

Sub MyCallback(ByVal sender As BrickletSolidStateRelay, ByVal value As Short)
    Console.WriteLine("Value: {0}", value)
End Sub

AddHandler solidStateRelay.ExampleCallback, AddressOf MyCallback

The available callback property and their type of parameters are described below.

Event BrickletSolidStateRelay.MonoflopDoneCallback(ByVal sender As BrickletSolidStateRelay, ByVal state As Boolean)¶

Callback Parameters:	sender – Type: BrickletSolidStateRelay state – Type: Boolean

This callback is triggered whenever the monoflop timer reaches 0. The parameter is the current state of the relay (the state after the monoflop).

Virtual Functions¶

Virtual functions don't communicate with the device itself, but operate only on the API bindings device object. They can be called without the corresponding IP Connection object being connected.

Function BrickletSolidStateRelay.GetAPIVersion() As Byte()¶

Output Parameters:	apiVersion – Type: Byte Array, Length: 3 0: major – Type: Byte, Range: [0 to 255] 1: minor – Type: Byte, Range: [0 to 255] 2: revision – Type: Byte, Range: [0 to 255]

Returns the version of the API definition 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.

Function BrickletSolidStateRelay.GetResponseExpected(ByVal functionId As Byte) As Boolean¶

Parameters:	functionId – Type: Byte, Range: See constants
Returns:	responseExpected – Type: Boolean

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 sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• BrickletSolidStateRelay.FUNCTION_SET_STATE = 1
• BrickletSolidStateRelay.FUNCTION_SET_MONOFLOP = 3

Sub BrickletSolidStateRelay.SetResponseExpected(ByVal functionId As Byte, ByVal responseExpected As Boolean)¶

Parameters:	functionId – Type: Byte, Range: See constants responseExpected – Type: Boolean

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.

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 sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• BrickletSolidStateRelay.FUNCTION_SET_STATE = 1
• BrickletSolidStateRelay.FUNCTION_SET_MONOFLOP = 3

Sub BrickletSolidStateRelay.SetResponseExpectedAll(ByVal responseExpected As Boolean)¶

Parameters:	responseExpected – Type: Boolean

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

Constants¶

Const BrickletSolidStateRelay.DEVICE_IDENTIFIER¶

This constant is used to identify a Solid State Relay Bricklet.

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

Const BrickletSolidStateRelay.DEVICE_DISPLAY_NAME¶

This constant represents the human readable name of a Solid State Relay Bricklet.