we now send packets to mqtt server

src/mqtt/MQTT.cpp

@@ -1,6 +1,7 @@
 #include "MQTT.h"
 #include "MQTTPlugin.h"
 #include "NodeDB.h"
+#include "main.h"
 #include "mesh/generated/mqtt.pb.h"
 #include <WiFi.h>
 #include <assert.h>
@@ -30,7 +31,7 @@ void mqttInit()
     }
 }
 
-MQTT::MQTT() : pubSub(mqttClient)
+MQTT::MQTT() : concurrency::OSThread("mqtt"), pubSub(mqttClient)
 {
     assert(!mqtt);
     mqtt = this;
@@ -50,6 +51,8 @@ MQTT::MQTT() : pubSub(mqttClient)
     bool connected = pubSub.connect(owner.id, myStatus.c_str(), 1, true, "offline");
     if (connected) {
         DEBUG_MSG("MQTT connected\n");
+        enabled = true; // Start running background process again
+        runASAP = true;
 
         static char subsStr[64]; /* We keep this static because the mqtt lib
                                     might not be copying it */
@@ -62,6 +65,15 @@ MQTT::MQTT() : pubSub(mqttClient)
     }
 }
 
+int32_t MQTT::runOnce()
+{
+    // If connected poll rapidly, otherwise sleep forever
+    if (!pubSub.loop())
+        enabled = false;
+
+    return 20;
+}
+
 void MQTT::publish(const MeshPacket &mp)
 {
     // don't bother sending if not connected...

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);
 };