Show network- and mqtt connection status on lcd

main/lcd.cpp

+#include <qthing.h>
 #include "lcd.h"
 #include "mqtt.h"
 
+#include <string>
 #include <vector>
 #include <sstream>
 
@@ -14,9 +16,27 @@ void enable_lcd(const std::string& topic, uint8_t rs, uint8_t en, uint8_t d4, ui
 
     lcd.begin(16, 2);
     lcd.clear();
-    lcd.print("qthing");
-    lcd.setCursor(0, 1);
-    lcd.print("Hello World!");
+    lcd.print("Uninitialized");
+
+    add_wlan_connection_status_handler([](connection_status_t connection_status) {
+        lcd.clear();
+        if (connection_status == connecting) {
+            lcd.print("WLAN connecting");
+        }
+        else if (connection_status == disconnected) {
+            lcd.print("WLAN offline");
+        }
+    });
+
+    add_mqtt_connection_status_handler([](connection_status_t connection_status) {
+        lcd.clear();
+        if (connection_status == connecting) {
+            lcd.print("MQTT connecting");
+        }
+        else if (connection_status == disconnected) {
+            lcd.print("MQTT offline");
+        }
+    });
 
     add_message_callback(topic, [](std::string message) {
         lcd.clear();