Add configurable update interval for LTR390 sensor

Integrations/ESPHome/Core.yaml

@@ -53,6 +53,10 @@ globals:
     restore_value: no
     type: uint32_t
     initial_value: '0'
+  - id: ltr390_last_update
+    restore_value: no
+    type: uint32_t
+    initial_value: '0'
 
 i2c:
   sda: GPIO1
@@ -147,6 +151,20 @@ number:
     update_interval: never
     step: 0.1
     mode: box
+  - platform: template
+    name: LTR390 Update Interval
+    id: ltr390_update_interval
+    disabled_by_default: true
+    restore_value: true
+    initial_value: 60
+    min_value: 1
+    max_value: 300
+    entity_category: "CONFIG"
+    unit_of_measurement: "s"
+    optimistic: true
+    update_interval: never
+    step: 1
+    mode: box
 # Setting start of zone 1 occupancy
   - platform: template
     name: "Radar Zone 1 Start"
@@ -525,6 +543,7 @@ sensor:
 
   - platform: ltr390
     id: ltr_390
+    update_interval: never
     light:
       name: "LTR390 Light"
       id: ltr390light
@@ -704,3 +723,24 @@ interval:
             - light.turn_off:
                 id: rgb_light
             - lambda: 'id(cycleCounter) += 1;'
+
+  - interval: 1s
+    then:
+      - lambda: |-
+          uint32_t current_time = millis() / 1000;  // Convert to seconds
+          uint32_t last_update = id(ltr390_last_update);
+          float configured_interval = id(ltr390_update_interval).state;
+          uint32_t interval = (configured_interval >= 1.0f) ? (uint32_t)configured_interval : 60u;
+
+          // Immediate update on boot (when last_update is still 0)
+          if (last_update == 0) {
+            id(ltr_390).update();
+            id(ltr390_last_update) = current_time;
+            return;
+          }
+
+          // Check if enough time has passed
+          if (current_time - last_update >= interval) {
+            id(ltr_390).update();
+            id(ltr390_last_update) = current_time;
+          }