diff --git a/src/MyMqttClient.cpp b/src/MyMqttClient.cpp
index d00747c..140ac01 100644
--- a/src/MyMqttClient.cpp
+++ b/src/MyMqttClient.cpp
@@ -22,6 +22,11 @@ MyMqttClient::MyMqttClient()
     mqttClient.setKeepAlive(300);
 }
 
+/**
+ * Ensures the MQTT broker connection is established.
+ * Attempts reconnection at most once every MQTT_RECONNECT_INTERVAL_MS.
+ * Returns true if connected and ready to publish.
+ */
 bool MyMqttClient::ensureConnected()
 {
     if (mqttClient.connected())
@@ -67,6 +72,10 @@ bool MyMqttClient::ensureConnected()
     return ok;
 }
 
+/**
+ * Publishes a window open/close event to MQTT_TOPIC_FENSTER.
+ * Payload: {"fenster":"<name>","event":"open"|"close"}
+ */
 void MyMqttClient::publishFensterEvent(const char* name, bool bOpen)
 {
     if (!ensureConnected())
@@ -89,6 +98,9 @@ void MyMqttClient::publishFensterEvent(const char* name, bool bOpen)
     }
 }
 
+/**
+ * Publishes an arbitrary status payload to MQTT_TOPIC_STATUS.
+ */
 void MyMqttClient::publishStatus(const char* payload)
 {
     if (!ensureConnected())
@@ -98,6 +110,10 @@ void MyMqttClient::publishStatus(const char* payload)
     mqttClient.publish(MQTT_TOPIC_STATUS, payload);
 }
 
+/**
+ * Main loop handler. Reconnects WiFi if lost, maintains the MQTT connection,
+ * and publishes the WiFi RSSI periodically. Call from the main loop.
+ */
 void MyMqttClient::onLoop()
 {
     if (!WiFi.isConnected())