Add LIB_VERSION property to let cloud decide to use thing_topic or device_topic for OTA properties

Author: pennam

src/AIoTC_Config.h

@@ -153,4 +153,6 @@
 #define AIOT_CONFIG_RP2040_OTA_HTTP_HEADER_RECEIVE_TIMEOUT_ms   (10*1000UL)
 #define AIOT_CONFIG_RP2040_OTA_HTTP_DATA_RECEIVE_TIMEOUT_ms   (4*60*1000UL)
 
+#define AIOT_CONFIG_LIB_VERSION "1.5.0"
+
 #endif /* ARDUINO_AIOTC_CONFIG_H_ */

src/ArduinoIoTCloud.cpp

@@ -33,6 +33,7 @@ ArduinoIoTCloudClass::ArduinoIoTCloudClass()
 , _tz_dst_until{0}
 , _thing_id{""}
 , _device_id{""}
+, _lib_version{AIOT_CONFIG_LIB_VERSION}
 , _cloud_event_callback{nullptr}
 , _thing_id_outdated{false}
 {

src/ArduinoIoTCloud.h

@@ -174,6 +174,7 @@ class ArduinoIoTCloudClass
     int _tz_offset;
     unsigned int _tz_dst_until;
     String _thing_id;
+    String _lib_version;
 
     void execCloudEventCallback(ArduinoIoTCloudEvent const event);
 

src/ArduinoIoTCloudTCP.cpp

@@ -251,6 +251,7 @@ int ArduinoIoTCloudTCP::begin(bool const enable_watchdog, String brokerAddress,
   _deviceTopicOut = getTopic_deviceout();
   _deviceTopicIn  = getTopic_devicein();
 
+  addPropertyReal(_lib_version, _device_property_container, "LIB_VERSION", Permission::Read);
 #if OTA_ENABLED
   addPropertyReal(_ota_cap, _device_property_container, "OTA_CAP", Permission::Read);
   addPropertyReal(_ota_error, _device_property_container, "OTA_ERROR", Permission::Read);
@@ -763,7 +764,7 @@ void ArduinoIoTCloudTCP::sendOTAPropertiesToCloud(bool include_ota_req)
   PropertyContainer ota_property_container;
   unsigned int last_ota_property_index = 0;
 
-  std::list<String> ota_property_list {"OTA_CAP", "OTA_ERROR", "OTA_SHA256"};
+  std::list<String> ota_property_list {"LIB_VERSION", "OTA_CAP", "OTA_ERROR", "OTA_SHA256"};
   if (include_ota_req)
     ota_property_list.push_back("OTA_REQ");
   std::for_each(ota_property_list.begin(),