Connect

This method initiates a connection between the MQTT broker (MQTT server) and client, and sets the timeout value for the client. If the connection is established, this returns a true value. If no connection was made, a false value is returned. A connection will disconnect automatically if the timeout period is exceeded.

Group: MQTT Object

Syntax: oMQTT.Connect(ServerAddress, ClientId, Timeout) as Boolean

ServerAddress (String) the tcp IP address or name of the MQTT broker

ClientId (String) the name of the client

Timeout (Long) the time in seconds a client waits before the connection is closed

bOK (Boolean) True means there is already a connection; False means there isn’t a connection.

Example:

Dim WithEvents moClient As New MQTT

Private Sub Form_Load()

On Error Resume Next

App.Balloon("Connecting...", -1)

If Not moClient.Connect("tcp://localhost:1883", "RFgen_Publisher_Client_001", 4000)

Then

App.MsgBox("Error: " & moClient.Error)

Exit Sub

End If

App.Balloon("", 0)

End Sub

Versions Supported: RFgen 5.1.3 and newer.