Hygiene fix in MQTT demos to log warning for unexpected PINGRESP packet event (#366)

Update MQTT demos to log warning on receiving PINGRESP packet in event callback

FreeRTOS-Plus/Demo/AWS/Device_Shadow_Windows_Simulator/Device_Shadow_Demo/DemoTasks/shadow_demo_helpers.c

@@ -469,9 +469,9 @@ void vHandleOtherIncomingPacket( MQTTPacketInfo_t * pxPacketInfo,
         case MQTT_PACKET_TYPE_PINGRESP:
 
             /* Nothing to be done from application as library handles
-             * PINGRESP. */
+             * PINGRESP with the use of MQTT_ProcessLoop API function. */
             LogWarn( ( "PINGRESP should not be handled by the application "
-                       "callback when using MQTT_ProcessLoop.\n\n" ) );
+                       "callback when using MQTT_ProcessLoop.\n" ) );
             break;
 
         case MQTT_PACKET_TYPE_PUBACK:

FreeRTOS-Plus/Demo/coreMQTT_Windows_Simulator/MQTT_Basic_TLS/DemoTasks/BasicTLSMQTTExample.c

@@ -778,7 +778,11 @@ static void prvMQTTProcessResponse( MQTTPacketInfo_t * pxIncomingPacket,
             break;
 
         case MQTT_PACKET_TYPE_PINGRESP:
-            LogInfo( ( "Ping Response successfully received.\r\n" ) );
+
+            /* Nothing to be done from application as library handles
+             * PINGRESP with the use of MQTT_ProcessLoop API function. */
+            LogWarn( ( "PINGRESP should not be handled by the application "
+                       "callback when using MQTT_ProcessLoop.\n" ) );
             break;
 
         case MQTT_PACKET_TYPE_PUBREC:

FreeRTOS-Plus/Demo/coreMQTT_Windows_Simulator/MQTT_Multitask/DemoTasks/MultitaskMQTTExample.c

@@ -1716,7 +1716,7 @@ static void prvEventCallback( MQTTContext_t * pMqttContext,
             case MQTT_PACKET_TYPE_PINGRESP:
 
                 /* Nothing to be done from application as library handles
-                 * PINGRESP. */
+                 * PINGRESP with the use of MQTT_ProcessLoop API function. */
                 LogWarn( ( "PINGRESP should not be handled by the application "
                            "callback when using MQTT_ProcessLoop.\n" ) );
                 break;

FreeRTOS-Plus/Demo/coreMQTT_Windows_Simulator/MQTT_Mutual_Auth/DemoTasks/MutualAuthMQTTExample.c

@@ -902,7 +902,11 @@ static void prvMQTTProcessResponse( MQTTPacketInfo_t * pxIncomingPacket,
             break;
 
         case MQTT_PACKET_TYPE_PINGRESP:
-            LogInfo( ( "Ping Response successfully received.\r\n" ) );
+
+            /* Nothing to be done from application as library handles
+             * PINGRESP with the use of MQTT_ProcessLoop API function. */
+            LogWarn( ( "PINGRESP should not be handled by the application "
+                       "callback when using MQTT_ProcessLoop.\n" ) );
             break;
 
         /* Any other packet type is invalid. */

FreeRTOS-Plus/Demo/coreMQTT_Windows_Simulator/MQTT_Plain_Text/DemoTasks/PlaintextMQTTExample.c

@@ -153,8 +153,8 @@
  */
 #define mqttexampleTRANSPORT_SEND_RECV_TIMEOUT_MS    ( 200U )
 
-#define MILLISECONDS_PER_SECOND                     ( 1000U )                                         /**< @brief Milliseconds per second. */
-#define MILLISECONDS_PER_TICK                       ( MILLISECONDS_PER_SECOND / configTICK_RATE_HZ ) /**< Milliseconds per FreeRTOS tick. */
+#define MILLISECONDS_PER_SECOND                      ( 1000U )                                        /**< @brief Milliseconds per second. */
+#define MILLISECONDS_PER_TICK                        ( MILLISECONDS_PER_SECOND / configTICK_RATE_HZ ) /**< Milliseconds per FreeRTOS tick. */
 
 /*-----------------------------------------------------------*/
 
@@ -723,7 +723,11 @@ static void prvMQTTProcessResponse( MQTTPacketInfo_t * pxIncomingPacket,
             break;
 
         case MQTT_PACKET_TYPE_PINGRESP:
-            LogInfo( ( "Ping Response successfully received." ) );
+
+            /* Nothing to be done from application as library handles
+             * PINGRESP with the use of MQTT_ProcessLoop API function. */
+            LogWarn( ( "PINGRESP should not be handled by the application "
+                       "callback when using MQTT_ProcessLoop.\n" ) );
             break;
 
         /* Any other packet type is invalid. */

FreeRTOS-Plus/Demo/corePKCS11_MQTT_Mutual_Auth_Windows_Simulator/DemoTasks/MutualAuthMQTTExample.c

@@ -621,7 +621,11 @@ static void prvMQTTProcessResponse( MQTTPacketInfo_t * pxIncomingPacket,
             break;
 
         case MQTT_PACKET_TYPE_PINGRESP:
-            LogInfo( ( "Ping Response successfully received.\r\n" ) );
+
+            /* Nothing to be done from application as library handles
+             * PINGRESP with the use of MQTT_ProcessLoop API function. */
+            LogWarn( ( "PINGRESP should not be handled by the application "
+                       "callback when using MQTT_ProcessLoop.\n" ) );
             break;
 
         /* Any other packet type is invalid. */