diff --git a/firmware/vanalign/esp32_ble.yaml b/firmware/vanalign/esp32_ble.yaml
index 8c1f2e7..2f43a2f 100644
--- a/firmware/vanalign/esp32_ble.yaml
+++ b/firmware/vanalign/esp32_ble.yaml
@@ -75,6 +75,15 @@ sensor:
           send_every: 1
       - exponential_moving_average:
           alpha: 0.2
+    on_value:
+      then:
+        - ble_server.characteristic.set_value:
+            id: pitch_ble
+            value: !lambda |-
+              std::vector<unsigned char> v(sizeof(float));
+              float val = x;
+              memcpy(v.data(), &val, sizeof(float));
+              return v;
 
   - platform: template
     name: "Neigung Roll"
@@ -95,6 +104,15 @@ sensor:
           send_every: 1
       - exponential_moving_average:
           alpha: 0.2
+    on_value:
+      then:
+        - ble_server.characteristic.set_value:
+            id: roll_ble
+            value: !lambda |-
+              std::vector<unsigned char> v(sizeof(float));
+              float val = x;
+              memcpy(v.data(), &val, sizeof(float));
+              return v;
 
 globals:
   - id: pitch_offset
@@ -115,24 +133,18 @@ esp32_ble_server:
     - uuid: 2a24b789-7aab-4535-af3e-ee76a35cc42d
       advertise: true
       characteristics:
+        # Ohne "value:" – der Wert wird bei jeder Messung gesetzt, siehe
+        # on_value beim Sensor. Ein getemplatetes "value:" führt ESPHome nur
+        # einmal aus, in setup(); die Charakteristik behielte dann für immer
+        # den Wert vom Start, und jede Abfrage lieferte dieselbe Zahl.
         - id: pitch_ble
           uuid: cad48e28-7fbe-41cf-bae9-d77a6c233424
           description: "Pitch"
           read: true
-          value: !lambda |-
-            std::vector<unsigned char> v(sizeof(float));
-            float val = id(pitch).state;
-            memcpy(v.data(), &val, sizeof(float));
-            return v;
         - id: roll_ble
           uuid: cad48e28-7fbe-41cf-bae9-d77a6c233425
           description: "Roll"
           read: true
-          value: !lambda |-
-            std::vector<unsigned char> v(sizeof(float));
-            float val = id(roll).state;
-            memcpy(v.data(), &val, sizeof(float));
-            return v;
         - id: calib_ble
           uuid: cad48e28-7fbe-41cf-bae9-d77a6c233427
           description: "Kalibriere Neigung"