Replace Wemos D1 mini with Wemos D1 mini ESP32

src/wlan.cpp

@@ -1,10 +1,6 @@
 #include "wlan.h"
 
-void initialize_wlan() {
-    connection_handler = WiFi.onStationModeGotIP(on_wlan_connection);
-    disconnection_handler =
-        WiFi.onStationModeDisconnected(on_wlan_disconnection);
-}
+void initialize_wlan() { WiFi.onEvent(wlan_connection_handler); }
 
 void initialize_mqtt() {
     mqtt_client.onConnect(on_mqtt_connection);
@@ -21,15 +17,19 @@ void connect_mqtt() {
     mqtt_client.connect();
 }
 
-void on_wlan_connection(const WiFiEventStationModeGotIP &event) {
-    Serial.println("WiFi connected");
-    connect_mqtt();
-}
-
-void on_wlan_disconnection(const WiFiEventStationModeDisconnected &event) {
-    Serial.println("WiFi disconnected");
-    mqtt_connection_timer.detach();
-    wlan_connection_timer.once(2, connect_wlan);
+void wlan_connection_handler(WiFiEvent_t event) {
+    Serial.printf("[WiFi-event] event: %d\n", event);
+    switch (event) {
+    case SYSTEM_EVENT_STA_GOT_IP:
+        Serial.println("WiFi connected");
+        connect_mqtt();
+        break;
+    case SYSTEM_EVENT_STA_DISCONNECTED:
+        Serial.println("WiFi disconnected");
+        mqtt_connection_timer.detach();
+        wlan_connection_timer.once(2, connect_wlan);
+        break;
+    }
 }
 
 void on_mqtt_connection(bool session) {