title: Paho MQTT Client Publication / Disconnect Sequence
body: <p>I am confused by the programming model of mqtt.
  My goal is to deploy a client that periodically retrieves sensor data
   and publish them on a topic via mqtt paho client.</p>
  
  <p>In the code-examples from paho after every publication they disconnects, but i have also see examples where the client published data without a disconnect message sending after each sensor data publication. 
  What is the best approach ?</p>