TsgcWSPClient_MQTT | Client MQTT Connect

In order to connect to a MQTT Server, you must create first a TsgcWebSocketClient and a TsgcWSPClient_MQTT. Then you must attach MQTT Component to WebSocket Client.

 

Basic Usage

Connect to Mosquitto MQTT server using websocket protocol. Subscribe to topic: "topic1" after connect.

 

oClient = new TsgcWebSocketClient();
oClient.Host = "test.mosquitto.org";
oClient.Port = 8080;
oMQTT = TsgcWSPClient_MQTT.Create(nil);
oMQTT.Client = oClient;
oClient.Active = true;
 
void OnMQTTConnect(TsgcWSConnection Connection, bool Session, int ReasonCode, 
  string ReasonName, TsgcWSMQTTCONNACKProperties ConnectProperties);
{
  oMQTT.Subscribe("topic1");
}

 

Client Identifier

MQTT requires a Client Identifier to identify client connection. Component sets a random value automatically but you can set your own Client Identifier if required, to do this, just handle OnBeforeConnect event and set your value on aClientIdentifier parameter.

 

void OnMQTTBeforeConnect(TsgcWSConnection Connection, ref bool aCleanSession, 
  ref string aClientIdentifier)
{
  aClientIdentifier = "your client id";
}

Authentication

Somes servers require an user and password to authorize MQTT connections. Use Authentication property to set the value for username and password before connect to server.

 

oMQTT = new TsgcWSPClient_MQTT();
oMQTT.Authentication.Enabled = true;
oMQTT.Authentication.UserName = "your user";
oMQTT.Authentication.Password = "your passwrd";