v1.5.0 to fix multiple-definitions linker error

### Releases v1.5.0

1. Fix `multiple-definitions` linker error and weird bug related to `src_cpp`. Check [Different behaviour using the src_cpp or src_h lib #80](https://github.com/khoih-prog/ESPAsync_WiFiManager/discussions/80)
2. Optimize library code by using `reference-passing` instead of `value-passing`
3. Update all examples

examples/AsyncCustomHeader_STM32/AsyncCustomHeader_STM32.ino

@@ -24,10 +24,16 @@
 //char GET_ServerAddress[]      = "192.168.2.110/";
 char GET_ServerAddress[]    = "http://worldtimeapi.org/api/timezone/America/Toronto.txt";
 
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
 // 600s = 10 minutes to not flooding, 60s in testing
 #define HTTP_REQUEST_INTERVAL_MS     60000  //600000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -86,6 +92,14 @@ void setup(void)
   Serial.println("\nStart AsyncCustomHeader_STM32 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/AsyncDweetGet_STM32/AsyncDweetGet_STM32.ino

@@ -35,10 +35,16 @@ const char GET_ServerAddress[] = "dweet.io";
 // use your own thing name here
 String dweetName = "/dweet/for/currentSecond?second=";
 
-// 60s = 60 seconds to not flooding the server
-#define HTTP_REQUEST_INTERVAL_MS     60000
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+// 600s = 10 minutes to not flooding, 60s in testing
+#define HTTP_REQUEST_INTERVAL_MS     60000  //600000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -134,6 +140,14 @@ void setup(void)
   Serial.println("\nStart AsyncDweetGET_STM32 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/AsyncDweetPost_STM32/AsyncDweetPost_STM32.ino

@@ -29,10 +29,16 @@ const char POST_ServerAddress[] = "dweet.io";
 // use your own thing name here
 String dweetName = "/dweet/for/pinA0-Read?";
 
-// 60s = 60 seconds to not flooding the server
-#define HTTP_REQUEST_INTERVAL_MS     10000
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+// 600s = 10 minutes to not flooding, 60s in testing
+#define HTTP_REQUEST_INTERVAL_MS     60000  //600000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -133,6 +139,14 @@ void setup(void)
   Serial.println("\nStart AsyncDweetPOST_STM32 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/AsyncHTTPMultiRequests_ESP/AsyncHTTPMultiRequests_ESP.ino

@@ -44,6 +44,12 @@
   #error This code is intended to run on the ESP8266 or ESP32 platform! Please check your Tools->Board setting.
 #endif
 
+#define ESP_WIFIMANAGER_VERSION_MIN_TARGET                  "ESP_WiFiManager v1.8.0"
+#define ESP_WIFIMANAGER_VERSION_MIN                         1008000
+
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET       "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN              1005000
+
 // Level from 0-4
 #define ASYNC_HTTP_DEBUG_PORT     Serial
 #define _ASYNC_HTTP_LOGLEVEL_     1
@@ -65,7 +71,11 @@ const char* password    = "your_pass";
   #include <WiFi.h>
 #endif
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
 #include <Ticker.h>
 
 AsyncHTTPRequest request;
@@ -172,6 +182,14 @@ void setup()
   
   Serial.println("\nStarting AsyncHTTPMultiRequests using " + String(ARDUINO_BOARD));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
+  
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
 
   WiFi.mode(WIFI_STA);
 

examples/AsyncHTTPRequest_ESP/AsyncHTTPRequest_ESP.ino

@@ -65,7 +65,14 @@ const char* password    = "your_pass";
   #include <WiFi.h>
 #endif
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
 #include <Ticker.h>
 
 AsyncHTTPRequest request;

examples/AsyncHTTPRequest_ESP_WiFiManager/AsyncHTTPRequest_ESP_WiFiManager.ino

@@ -46,6 +46,9 @@
   #error This code is intended to run on the ESP8266 or ESP32 platform! Please check your Tools->Board setting.
 #endif
 
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
 // Level from 0-4
 #define ASYNC_HTTP_DEBUG_PORT     Serial
 
@@ -238,12 +241,19 @@ IPAddress APStaticSN  = IPAddress(255, 255, 255, 0);
 
 #include <ESPAsync_WiFiManager.h>              //https://github.com/khoih-prog/ESPAsync_WiFiManager
 
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <ESPAsync_WiFiManager-Impl.h>         //https://github.com/khoih-prog/ESPAsync_WiFiManager
+
 #define HTTP_PORT           80
 
 AsyncWebServer webServer(HTTP_PORT);
 DNSServer dnsServer;
 
-#include <AsyncHTTPRequest_Generic.h>         // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
 #include <Ticker.h>
 
 AsyncHTTPRequest request;
@@ -549,6 +559,22 @@ void setup()
   Serial.println(ESP_ASYNC_WIFIMANAGER_VERSION);
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ESP_WIFIMANAGER_VERSION_MIN)
+  if (ESP_WIFIMANAGER_VERSION_INT < ESP_WIFIMANAGER_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ESP_WIFIMANAGER_VERSION_MIN_TARGET);
+  }
+#endif
+
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   if (FORMAT_FILESYSTEM) 
     FileFS.format();
 

examples/AsyncHTTPRequest_STM32/AsyncHTTPRequest_STM32.ino

@@ -42,10 +42,16 @@
 
 #include "defines.h"
 
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
 // 600s = 10 minutes to not flooding, 60s in testing
 #define HTTP_REQUEST_INTERVAL_MS     60000  //600000
 
-#include <AsyncHTTPRequest_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                   // https://github.com/sstaub/Ticker
 
@@ -103,6 +109,14 @@ void setup(void)
   Serial.println("\nStart AsyncHTTPRequest_STM32 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif  
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/AsyncSimpleGET_STM32/AsyncSimpleGET_STM32.ino

@@ -24,10 +24,16 @@
 //char GET_ServerAddress[]    = "ipv4bot.whatismyipaddress.com/";
 char GET_ServerAddress[]    = "http://worldtimeapi.org/api/timezone/America/Toronto.txt";
 
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
 // 600s = 10 minutes to not flooding, 60s in testing
 #define HTTP_REQUEST_INTERVAL_MS     60000  //600000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -84,6 +90,14 @@ void setup(void)
   Serial.println("\nStart AsyncSimpleGET_STM32 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/AsyncWebClientRepeating_STM32/AsyncWebClientRepeating_STM32.ino

@@ -26,10 +26,16 @@ const char GET_ServerAddress[] = "arduino.cc";
 // GET location
 String GET_Location = "/asciilogo.txt";
 
-// 60s = 60 seconds to not flooding the server
-#define HTTP_REQUEST_INTERVAL_MS     60000
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+// 600s = 10 minutes to not flooding, 60s in testing
+#define HTTP_REQUEST_INTERVAL_MS     60000  //600000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -86,6 +92,13 @@ void setup(void)
   Serial.println("\nStart AsyncWebClientRepeating_STM32 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/STM32_LAN8720/AsyncCustomHeader_STM32_LAN8720/AsyncCustomHeader_STM32_LAN8720.ino

@@ -24,10 +24,16 @@
 //char GET_ServerAddress[]      = "192.168.2.110/";
 char GET_ServerAddress[]    = "http://worldtimeapi.org/api/timezone/America/Toronto.txt";
 
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
 // 600s = 10 minutes to not flooding, 60s in testing
 #define HTTP_REQUEST_INTERVAL_MS     60000  //600000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -86,6 +92,14 @@ void setup(void)
   Serial.println("\nStart AsyncCustomHeader_STM32_LAN8720 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/STM32_LAN8720/AsyncDweetGet_STM32_LAN8720/AsyncDweetGet_STM32_LAN8720.ino

@@ -35,10 +35,16 @@ const char GET_ServerAddress[] = "dweet.io";
 // use your own thing name here
 String dweetName = "/dweet/for/currentSecond?second=";
 
-// 60s = 60 seconds to not flooding the server
-#define HTTP_REQUEST_INTERVAL_MS     60000
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+// 600s = 10 minutes to not flooding, 60s in testing
+#define HTTP_REQUEST_INTERVAL_MS     60000  //600000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -134,6 +140,14 @@ void setup(void)
   Serial.println("\nStart AsyncDweetGET_STM32_LAN8720 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/STM32_LAN8720/AsyncDweetPost_STM32_LAN8720/AsyncDweetPost_STM32_LAN8720.ino

@@ -29,10 +29,16 @@ const char POST_ServerAddress[] = "dweet.io";
 // use your own thing name here
 String dweetName = "/dweet/for/pinA0-Read?";
 
-// 60s = 60 seconds to not flooding the server
-#define HTTP_REQUEST_INTERVAL_MS     10000
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+// 600s = 10 minutes to not flooding, 60s in testing
+#define HTTP_REQUEST_INTERVAL_MS     60000  //600000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -133,6 +139,14 @@ void setup(void)
   Serial.println("\nStart AsyncDweetPOST_STM32_LAN8720 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/STM32_LAN8720/AsyncHTTPRequest_STM32_LAN8720/AsyncHTTPRequest_STM32_LAN8720.ino

@@ -42,10 +42,16 @@
 
 #include "defines.h"
 
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
 // 600s = 10 minutes to not flooding, 60s in testing
 #define HTTP_REQUEST_INTERVAL_MS     60000  //600000
 
-#include <AsyncHTTPRequest_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                   // https://github.com/sstaub/Ticker
 
@@ -103,6 +109,14 @@ void setup(void)
   Serial.println("\nStart AsyncHTTPRequest_STM32_LAN8720 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/STM32_LAN8720/AsyncSimpleGET_STM32_LAN8720/AsyncSimpleGET_STM32_LAN8720.ino

@@ -24,10 +24,16 @@
 //char GET_ServerAddress[]    = "ipv4bot.whatismyipaddress.com/";
 char GET_ServerAddress[]    = "http://worldtimeapi.org/api/timezone/America/Toronto.txt";
 
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
 // 600s = 10 minutes to not flooding, 60s in testing
 #define HTTP_REQUEST_INTERVAL_MS     60000  //600000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -84,6 +90,14 @@ void setup(void)
   Serial.println("\nStart AsyncSimpleGET_STM32_LAN8720 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/STM32_LAN8720/AsyncWebClientRepeating_STM32_LAN8720/AsyncWebClientRepeating_STM32_LAN8720.ino

@@ -26,10 +26,16 @@ const char GET_ServerAddress[] = "arduino.cc";
 // GET location
 String GET_Location = "/asciilogo.txt";
 
-// 60s = 60 seconds to not flooding the server
-#define HTTP_REQUEST_INTERVAL_MS     60000
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+// 600s = 10 minutes to not flooding, 60s in testing
+#define HTTP_REQUEST_INTERVAL_MS     60000  //600000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
 
 #include <Ticker.h>                             // https://github.com/sstaub/Ticker
 
@@ -86,6 +92,14 @@ void setup(void)
   Serial.println("\nStart AsyncWebClientRepeating_STM32_LAN8720 on " + String(BOARD_NAME));
   Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // start the ethernet connection and the server
   // Use random mac
   uint16_t index = millis() % NUMBER_OF_MAC;

examples/WT32_ETH01/AsyncHTTPMultiRequests_WT32_ETH01/AsyncHTTPMultiRequests_WT32_ETH01.ino

@@ -57,7 +57,14 @@
 
 #include <WebServer_WT32_ETH01.h>               // https://github.com/khoih-prog/WebServer_WT32_ETH01
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
 #include <Ticker.h>
 
 AsyncHTTPRequest request;
@@ -184,6 +191,14 @@ void setup()
 
   Serial.setDebugOutput(true);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // To be called before ETH.begin()
   WT32_ETH01_onEvent();
 

examples/WT32_ETH01/AsyncHTTPRequest_WT32_ETH01/AsyncHTTPRequest_WT32_ETH01.ino

@@ -57,7 +57,14 @@
 
 #include <WebServer_WT32_ETH01.h>               // https://github.com/khoih-prog/WebServer_WT32_ETH01
 
-#include <AsyncHTTPRequest_Generic.h>           // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET      "AsyncHTTPRequest_Generic v1.5.0"
+#define ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN             1005000
+
+#include <AsyncHTTPRequest_Generic.h>             // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include <AsyncHTTPRequest_Impl_Generic.h>        // https://github.com/khoih-prog/AsyncHTTPRequest_Generic
+
 #include <Ticker.h>
 
 AsyncHTTPRequest request;
@@ -150,6 +157,14 @@ void setup()
 
   Serial.setDebugOutput(true);
 
+#if defined(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  if (ASYNC_HTTP_REQUEST_GENERIC_VERSION_INT < ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ASYNC_HTTP_REQUEST_GENERIC_VERSION_MIN_TARGET);
+  }
+#endif
+
   // To be called before ETH.begin()
   WT32_ETH01_onEvent();