Is there TLS support over MQTT for SiteWhere Arduino libraries ?

I have an ESP8266 set up with SiteWhere. Everything's working fine except the function for sending device measurements. sw_alert, sw_location have been tested to work. only the measure tab does not receive anything with sw_measurement function. Here's the code snippet
if (len = sw_acknowledge(hardwareId, "Command Received", buffer, sizeof(buffer), originator)) { my_mqttclient.publish(outbound, buffer, len); } if (len = sw_measurement(hardwareId, "engine.temp", 25.1, NULL, buffer, sizeof(buffer), originator)) { Serial.println("sending measurements"); my_mqttclient.publish(outbound, buffer, len); } if (len = sw_alert(hardwareId, "voltage", "myString", NULL, buffer, sizeof(buffer), originator)) { Serial.println("sending alert"); my_mqttclient.publish(outbound, buffer, len); }
Ack, and alerts work fine, but measurement part does not though the "if" condition goes true for measurement.