yaml tidyups and warning removals

esphome/common/sntp_common.yaml

@@ -11,6 +11,33 @@ substitutions:
   sntp_server_2: !secret ntp_server_2
   sntp_server_3: !secret ntp_server_3
 
+###########################################################################################
+# Internal clock fallback support
+# If SNTP is invalid, we fall back to a simple internal minute counter
+# We assume user powers on the device at 12:00 noon
+# => 12 * 60 = 720 minutes from midnight.
+# Not restored, so it resets each boot.
+# Therefore, if no network and you still need timing functions, switch on ay noon.
+###########################################################################################
+globals:
+  - id: current_mins
+    type: int
+    restore_value: no
+    initial_value: "720" # 720 is 12:00 Noon
+
+interval:
+  - interval: 60s
+    then:
+      - lambda: |-
+          // If SNTP valid, store minutes since midnight.
+          auto now = id(sntp_time).now();
+          if (now.is_valid()) {
+            id(current_mins) = (now.hour * 60) + now.minute;
+          } else {
+            // Fallback: minutes since boot.
+            id(current_mins) = (int)(millis() / 60000UL);
+          }
+
 ###########################################################################################
 # Real time clock time source for ESPHome
 # If it's invalid, we fall back to an internal clock
@@ -72,7 +99,6 @@ text_sensor:
       }
 
       // Fallback: show internal clock based on current_mins (minutes from midnight).
-      // NOTE: current_mins is expected to be a global defined in the main device YAML.
       int mins = id(current_mins);
       if (mins < 0) mins = 0;
       if (mins >= 1440) mins = mins % 1440;