we now send packets to mqtt server

src/mqtt/MQTT.h

@@ -2,6 +2,7 @@
 
 #include "configuration.h"
 
+#include "concurrency/OSThread.h"
 #include <PubSubClient.h>
 #include <WiFiClient.h>
 
@@ -9,7 +10,7 @@
  * Our wrapper/singleton for sending/receiving MQTT "udp" packets.  This object isolates the MQTT protocol implementation from
  * the two components that use it: MQTTPlugin and MQTTSimInterface.
  */
-class MQTT
+class MQTT : private concurrency::OSThread
 {
     // supposedly the current version is busted:
     // http://www.iotsharing.com/2017/08/how-to-use-esp32-mqtts-with-mqtts-mosquitto-broker-tls-ssl.html
@@ -25,6 +26,9 @@ class MQTT
      */
     void publish(const MeshPacket &mp);
 
+  protected:
+    virtual int32_t runOnce();
+
   private:
     const char *getCryptTopic(const char *channelId);
 };