connected Property

Triggers a connection or disconnection.

Syntax

def get_connected() -> bool: ...
def set_connected(value: bool) -> None: ...

connected = property(get_connected, set_connected)

Default Value

FALSE

Remarks

This property triggers a connection or disconnection. Setting this property to True makes the class send a CONNECT packet to the MQTTSN Gateway identified by the remote_host property. If successful, after the connection is achieved the value of the property changes to True and the on_connected event is fired.

Setting this property to False sends a DISCONNECT packet, closing the connection.

When connecting to an MQTT gateway, the class sends the following information:

• The values of the client_id, clean_session, and keep_alive_interval properties.
• The values of the will_topic and will_message properties and the WillRetain and WillQOS configuration settings.

Refer to clean_session for more information about MQTT sessions; refer to will_topic, will_message, WillQOS and WillRetain for more information about MQTT Wills.

Basic Connection Example

mqttsn1.ClientId = "testClient";
mqttsn1.CleanSession = true;
mqttsn1.KeepAliveInterval = 30;
mqttsn1.WillTopic = "wills/" + mqttsn1.ClientId;
mqttsn1.WillMessage = mqttsn1.ClientId + " was disconnected ungracefully!";
mqttsn1.Connect(host, port);