Some updates

ESP32-PoE-Test3/ESP32-PoE-Test3.ino

@@ -0,0 +1,35 @@
+/*
+    This sketch is combined demo of: 1) SD(esp_32) -- > SD_Test; 2) WiFi --> ETH_LAN8720
+    It displays info about the card on the terminal and initializes LAN after that. You can ping the IP address shown on the terminal.
+
+*/
+#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT
+#define ETH_PHY_POWER 12
+
+#include <ETH.h>
+
+static bool eth_connected = false;
+
+void WiFiEvent(WiFiEvent_t event);
+void testClient(const char * host, uint16_t port);
+
+#define BUTTON_PRESSED()  (!digitalRead (34))
+void setup()
+{
+    Serial.begin(115200);
+    WiFi.onEvent(WiFiEvent);
+    ETH.begin();
+    pinMode (34, INPUT);  // Button
+}
+
+
+void loop()
+{
+  if (BUTTON_PRESSED()) {
+    if (eth_connected) {
+      Serial.println("Button pressed");
+      testClient("google.com", 80);
+    }
+    delay(1000);
+  }
+}