[TinyMqtt.h] Added TINY_MQTT_ETHERNET compilation option

src/TinyMqtt.h

@@ -8,7 +8,10 @@
 // TODO Should add a AUnit with both TINY_MQTT_ASYNC and not TINY_MQTT_ASYNC
 // #define TINY_MQTT_ASYNC  // Uncomment this to use ESPAsyncTCP instead of normal cnx
 
-#if defined(ESP8266) || defined(EPOXY_DUINO)
+
+#if defined(TINY_MQTT_ETHERNET)
+  #include <Ethernet.h>
+#elif defined(ESP8266) || defined(EPOXY_DUINO)
   #ifdef TINY_MQTT_ASYNC
     #include <ESPAsyncTCP.h>
   #else
@@ -20,7 +23,7 @@
     #include <AsyncTCP.h> // https://github.com/me-no-dev/AsyncTCP
   #endif
 #elif defined(ARDUINO_ARCH_RP2040)
-  #include <WiFi.h> 
+  #include <WiFi.h>   // works with Raspberry Pi Pico W, earlephilhower
 #endif
 #ifdef EPOXY_DUINO
   #define dbg_ptr uint64_t
@@ -55,6 +58,10 @@
   #define debug(what) {}
 #endif
 
+#if defined(TINY_MQTT_ETHERNET)
+  using TcpClient = EthernetClient;
+  using TcpServer = EthernetServer;
+#else
   #ifdef TINY_MQTT_ASYNC
     using TcpClient = AsyncClient;
     using TcpServer = AsyncServer;
@@ -62,6 +69,7 @@
     using TcpClient = WiFiClient;
     using TcpServer = WiFiServer;
   #endif
+#endif
 
 enum __attribute__((packed)) MqttError
 {