Refactor boot sequence: adjust on_boot actions for backlight and display update; change display update interval to never; update backlight control to use GPIO

esphome/cat-medication-tracker.yaml

@@ -6,10 +6,9 @@ esphome:
   name: ${name}
   friendly_name: ${friendly_name}
   on_boot:
+    - priority: -10
       then:
-      - light.turn_on:
+        - light.turn_on: backlight
-          id: backlight
-          brightness: 100%
         - delay: 1s
         - component.update: my_display
 
@@ -80,7 +79,7 @@ display:
       height: 320
     id: my_display
     auto_clear_enabled: false
-    update_interval: 1s
+    update_interval: never
     color_palette: 8BIT
     lambda: |-
       // Colors
@@ -211,12 +210,13 @@ binary_sensor:
 
 # Backlight control
 output:
-  - platform: ledc
+  - platform: gpio
     pin: GPIO21
     id: backlight_pwm
+    inverted: false
 
 light:
-  - platform: monochromatic
+  - platform: binary
     output: backlight_pwm
     name: "${friendly_name} Backlight"
     id: backlight
@@ -258,12 +258,6 @@ script:
     then:
       - component.update: my_display
 
-# Keep screen refreshed in case startup sequencing misses the first draw
-interval:
-  - interval: 2s
-    then:
-      - component.update: my_display
-
 # Fonts
 font:
   - file: "gfonts://Roboto"