defining MQTT_TX_BUFFER_SIZE and STRING_PROPERTY_MAX_SIZE in cofig file

Author: andreagilardoni

src/AIoTC_Config.h

@@ -156,6 +156,21 @@
   #define HAS_TCP
 #endif
 
+#ifdef HAS_TCP
+  #ifndef MQTT_TX_BUFFER_SIZE
+    #define MQTT_TX_BUFFER_SIZE 256
+  #endif // MQTT_TX_BUFFER_SIZE
+
+  #ifndef STRING_PROPERTY_MAX_SIZE
+    // 6 represents the expected overhead of a string property inside a cbor
+    #define STRING_PROPERTY_MAX_SIZE MQTT_TX_BUFFER_SIZE - 6
+  #endif // STRING_PROPERTY_MAX_SIZE
+#else
+  #ifndef STRING_PROPERTY_MAX_SIZE
+    #define STRING_PROPERTY_MAX_SIZE 50
+  #endif // STRING_PROPERTY_MAX_SIZE
+#endif // HAS_TCP
+
 /******************************************************************************
  * CONSTANTS
  ******************************************************************************/

src/ArduinoIoTCloudTCP.h

@@ -106,7 +106,7 @@ class ArduinoIoTCloudTCP: public ArduinoIoTCloudClass
 #endif
 
   private:
-    static const int MQTT_TRANSMIT_BUFFER_SIZE = 256;
+    static const int MQTT_TRANSMIT_BUFFER_SIZE = MQTT_TX_BUFFER_SIZE;
 
     enum class State
     {