Add local time source, station buttons and link status

Prefer Home Assistant time with public NTP as fallback. Add next and previous
station, ESPHome and LibreTiny versions, and an MCU link sensor. Update notes
with the raw capture results and tidy the README to-do list.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

wake-up-light-ii.yaml

@@ -22,7 +22,7 @@ external_components:
   - source:
       type: git
       url: https://mangavalk.com/mangavalk/esphome-wake-up-light-ii.git
-      ref: v1.0.0
+      ref: v1.0.1
     components: [uart]
     refresh: 1d
 
@@ -136,6 +136,12 @@ globals:
     restore_value: no
     initial_value: '0'
 
+  # When the MCU last sent its once-a-minute clock report.
+  - id: last_mcu_report
+    type: uint32_t
+    restore_value: no
+    initial_value: '0'
+
   # Last display state the schedule applied: -1 none, 0 day, 1 night.
   - id: display_schedule_last
     type: int
@@ -165,14 +171,22 @@ time:
         - script.execute: sync_lamp_clock
         - script.execute: apply_display_schedule
 
-    on_time:
-      - seconds: 0
-        minutes: 0
-        then:
-          - script.execute: sync_lamp_clock
-      - seconds: 0
-        then:
-          - script.execute: apply_display_schedule
+  # Home Assistant is preferred when connected, so the clock doesn't need internet.
+  - platform: homeassistant
+    id: ha_time
+    on_time_sync:
+      then:
+        - delay: 2s
+        - script.execute: sync_lamp_clock
+        - script.execute: apply_display_schedule
+
+interval:
+  - interval: 1h
+    then:
+      - script.execute: sync_lamp_clock
+  - interval: 60s
+    then:
+      - script.execute: apply_display_schedule
 
 ###############################################################################
 # Tuya MCU
@@ -188,6 +202,7 @@ tuya:
       datapoint_type: string
       then:
         - lambda: |-
+            id(last_mcu_report) = millis();
             if (x.size() != 6) return;
             auto d = [](char c) -> int { return (c >= '0' && c <= '9') ? c - '0' : -1; };
             int h1=d(x[0]), h2=d(x[1]), m1=d(x[2]), m2=d(x[3]), s1=d(x[4]), s2=d(x[5]);
@@ -329,7 +344,8 @@ script:
     then:
       - lambda: |-
           if (!id(display_schedule_enabled).state) return;
-          auto now = id(network_time).now();
+          auto now = id(ha_time).now();
+          if (!now.is_valid()) now = id(network_time).now();
           if (!now.is_valid()) return;
           int start = id(display_night_start).hour * 60 + id(display_night_start).minute;
           int end = id(display_night_end).hour * 60 + id(display_night_end).minute;
@@ -370,6 +386,21 @@ script:
                 call.set_transition_length(0);
                 call.perform();
 
+  - id: radio_step
+    mode: queued
+    parameters:
+      step: int
+    then:
+      - lambda: |-
+          if (!id(radio_valid) || id(radio_total) == 0) {
+            ESP_LOGW("radio", "No stations found yet; run Radio Scan first");
+            return;
+          }
+          int total = id(radio_total);
+          int next = ((id(radio_current) - 1 + step) % total + total) % total + 1;
+          std::vector<uint8_t> data = {id(radio_total), static_cast<uint8_t>(next)};
+          id(tuya_mcu).set_raw_datapoint_value(107, data);
+
   - id: radio_sleep
     mode: restart
     then:
@@ -426,9 +457,10 @@ script:
     mode: restart
     then:
       - lambda: |-
-          auto now = id(network_time).now();
+          auto now = id(ha_time).now();
+          if (!now.is_valid()) now = id(network_time).now();
           if (!now.is_valid()) {
-            ESP_LOGW("clock", "No valid network time; use the Lamp Clock control in the web UI");
+            ESP_LOGW("clock", "No valid time source; use the Lamp Clock control in the web UI");
             return;
           }
           char buf[7];
@@ -932,6 +964,20 @@ text_sensor:
         sorting_group_id: group_device
         sorting_weight: 4
 
+  - platform: version
+    name: "ESPHome Version"
+    hide_timestamp: true
+    web_server:
+      sorting_group_id: group_device
+      sorting_weight: 6
+
+  - platform: libretiny
+    version:
+      name: "LibreTiny Version"
+      web_server:
+        sorting_group_id: group_device
+        sorting_weight: 7
+
 ###############################################################################
 # Device health
 ###############################################################################
@@ -969,6 +1015,16 @@ sensor:
 ###############################################################################
 
 binary_sensor:
+  # The MCU reports its clock every minute, so silence means the link is down.
+  - platform: template
+    name: "MCU Link"
+    device_class: connectivity
+    web_server:
+      sorting_group_id: group_device
+      sorting_weight: 0.5
+    lambda: |-
+      return id(last_mcu_report) != 0 && millis() - id(last_mcu_report) < 150000;
+
   - platform: gpio
     name: "Knock"
     icon: "mdi:gesture-tap"
@@ -1049,6 +1105,28 @@ button:
     on_press:
       - lambda: id(tuya_mcu).force_set_boolean_datapoint_value(126, false);
 
+  - platform: template
+    name: "Next Station"
+    icon: "mdi:skip-next"
+    web_server:
+      sorting_group_id: group_radio
+      sorting_weight: 2.7
+    on_press:
+      - script.execute:
+          id: radio_step
+          step: 1
+
+  - platform: template
+    name: "Previous Station"
+    icon: "mdi:skip-previous"
+    web_server:
+      sorting_group_id: group_radio
+      sorting_weight: 2.6
+    on_press:
+      - script.execute:
+          id: radio_step
+          step: -1
+
   - platform: template
     name: "Start Radio Sleep Timer"
     icon: "mdi:timer-outline"