diff --git a/3d/box.scad b/3d/box.scad
new file mode 100644
index 0000000..f3dbb26
--- /dev/null
+++ b/3d/box.scad
@@ -0,0 +1,28 @@
+// Maße
+width = 100;
+height = 70;
+depth = 30;
+wall = 2;
+
+// Hauptgehäuse
+difference() {
+    // Außengehäuse
+    cube([width, height, depth]);
+
+    // Innenaushöhlung
+    translate([wall, wall, wall])
+        cube([width - 2*wall, height - 2*wall, depth - wall]);
+
+    // Display-Ausschnitt vorne
+    translate([15, 20, depth - 1])
+        cube([70, 30, 2]);
+
+    // USB-Ausschnitt unten hinten
+    translate([width/2 - 5, -1, 5])
+        cube([10, wall + 1, 5]);
+
+    // Kippschalter oben (rundes Loch)
+    translate([width/2, height - wall, depth - 10])
+        rotate([90, 0, 0])
+            cylinder(h = wall + 2, r = 10, $fn=64);
+}
diff --git a/local_code/ESPHome/configuration.yaml b/local_code/ESPHome/configuration.yaml
index bc0d731..5e53ee8 100644
--- a/local_code/ESPHome/configuration.yaml
+++ b/local_code/ESPHome/configuration.yaml
@@ -11,10 +11,8 @@ esp32:
   framework:
     type: esp-idf
 
-# Enable logging
 logger:
 
-# Enable Home Assistant API
 api:
   encryption:
     key: "gLfRXKqMU9IvvwZnIdrWYIclAnc4q5sHVwTkRzUxKyw="
@@ -23,45 +21,89 @@ ota:
   - platform: esphome
     password: "1618b7dc423684c5d3661481ce284359"
 
-font: 
-
+font:
   - file: "gfonts://Roboto"
     id: my_font
-    size: 20
+    size: 18
 
 image:
   - file: "cat.svg"
     id: cat_img
     resize: 64x64
-    type: BINARY  # oder MONO für 1-Bit
+    type: BINARY
 
 wifi:
   ssid: !secret wifi_ssid
   password: !secret wifi_password
 
-  # Enable fallback hotspot (captive portal) in case wifi connection fails
   ap:
     ssid: "Doorwhat Fallback Hotspot"
     password: "KBiNyP7EkHCJ"
 
 captive_portal:
 
+time:
+  - platform: homeassistant
+    id: ha_time
+
 sensor:
   - platform: homeassistant
     entity_id: sensor.shellyhtg3_8cbfeaa53d88_humidity
     id: bad_feuchtigkeit
-    
+
 spi:
   clk_pin: 2
   mosi_pin: 15
 
-
 color:
   - id: red
     hex: "FF0000"
   - id: black
     hex: "FFFFFF"
 
+globals:
+  - id: last_on_time
+    type: std::string
+    restore_value: no
+    initial_value: '"Noch nie"'
+  - id: previous_on_time
+    type: std::string
+    restore_value: no
+    initial_value: '"Noch nie"'
+
+text_sensor:
+  - platform: template
+    name: "Letzter Gong"
+    id: letzter_gong_sensor
+  - platform: template
+    name: "Vorheriger Gong"
+    id: vorheriger_gong_sensor
+
+binary_sensor:
+  - platform: gpio
+    pin:
+      number: 18
+      mode: INPUT
+    id: opto_in
+    name: "Optokoppler Eingang"
+    on_press:
+      then:
+        - lambda: |-
+            auto time = id(ha_time).now();
+            std::string new_time;
+            if (time.is_valid()) {
+              new_time = time.strftime("%Y-%m-%d %H:%M:%S");
+            } else {
+              new_time = "Zeit unbekannt";
+            }
+
+            id(previous_on_time) = id(last_on_time);
+            id(last_on_time) = new_time;
+
+            id(letzter_gong_sensor).publish_state(id(last_on_time));
+            id(vorheriger_gong_sensor).publish_state(id(previous_on_time));
+        - component.update: my_display
+
 display:
   - platform: waveshare_epaper
     model: 2.90in3c
@@ -71,10 +113,14 @@ display:
     busy_pin: 5
     rotation: 270
     reset_duration: 2ms
-    update_interval: 30s
-    lambda: !lambda |-
-      it.print(0, 4, id(my_font), id(black), "DoorWhat v0.1");
-      it.print(80, 40, id(my_font), id(red), "Meow!");
-      //it.printf(0, 80, id(my_font), id(red), "Feuchtigkeit Bad %.1f", id(bad_feuchtigkeit).state);
-      it.image(150, 40, id(cat_img));
+    id: my_display
+    update_interval: 600s  # alle 10 Minuten automatisch
 
+    lambda: |-
+      it.print(0, 4, id(my_font), id(black), "DoorWhat v1.0");
+      it.print(170, 65, id(my_font), id(red), "Meow!");
+      it.image(186, 1, id(cat_img));
+      it.print(0, 30, id(my_font), id(black), "Letzter Gong:");
+      it.print(0, 50, id(my_font), id(red), id(last_on_time).c_str());
+      it.print(0, 70, id(my_font), id(black), "Vorheriger Gong:");
+      it.print(0, 90, id(my_font), id(red), id(previous_on_time).c_str());