Various fixes for ESP32 (#14102)

Marlin/src/HAL/HAL_ESP32/wifi.cpp

@@ -22,6 +22,7 @@
 
 #ifdef ARDUINO_ARCH_ESP32
 
+#include "../../core/serial.h"
 #include "../../inc/MarlinConfigPre.h"
 
 #if ENABLED(WIFISUPPORT)
@@ -38,20 +39,28 @@ AsyncWebServer server(80);
 #endif
 
 void wifi_init() {
+
+  SERIAL_ECHO_MSG("Starting WiFi...");
+
   WiFi.mode(WIFI_STA);
   WiFi.begin(WIFI_SSID, WIFI_PWD);
 
   while (WiFi.waitForConnectResult() != WL_CONNECTED) {
+    SERIAL_ERROR_MSG("Unable to connect to WiFi with SSID '" WIFI_SSID "', restarting.");
     delay(5000);
     ESP.restart();
   }
 
   delay(10);
-
-  // Loop forever (watchdog kill) on failure
-  if (!MDNS.begin(WIFI_HOSTNAME)) for(;;) delay(5000);
+  if (!MDNS.begin(WIFI_HOSTNAME)) {
+    SERIAL_ERROR_MSG("Unable to start mDNS with hostname '" WIFI_HOSTNAME "', restarting.");
+    delay(5000);
+    ESP.restart();
+  }
 
   MDNS.addService("http", "tcp", 80);
+
+  SERIAL_ECHOLNPAIR("Successfully connected to WiFi with SSID '" WIFI_SSID "', hostname: '" WIFI_HOSTNAME "', IP address: ", WiFi.localIP().toString().c_str());
 }
 
 #endif // WIFISUPPORT