title: How can I send a list using MQTT
body: <pre><code>   d = random,randint(1,30)
     data = [d, strftime("%Y%m%d %H%M%S", gmtime())] #random num , system time
     client.publish("gas", str(data)]
  </code></pre>
  
  <p>This is a part of my python code which is ver2.
  I'm trying to send a list using MQTT.
  However, If I write bytearray instead of str which is third line
  It says "ValueError: string must be of size 1".
  So I wrote str then make it sting type
  Can I send a just list which is NOT string type.</p>