Fully Kiosk Browser

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This thread is awesome! Building upon these posts, I was able to get this working without using curl, control the tablet display using a light template (on, off, brightness). I can select which dashboard (appdaemon/hadashboard) to display with input select and templated rest_command

Video demo

packages/tablet_master_bedroom.yaml

homeassistant:
  customize:
    sensor.tablet_mbr_screen_brightness:
      hidden: true
    binary_sensor.tablet_mbr_screen_on:
      hidden: true
    input_number.tablet_mbr_temp_screen_brightness:
      hidden: true

light:
  - platform: template
    lights:
      tablet_mbr_screen:
        friendly_name: "Master Bedroom Tablet"
        level_template: "{{ states('sensor.tablet_mbr_screen_brightness') }}"
        value_template: "{{ is_state('binary_sensor.tablet_mbr_screen_on', 'on') }}"
        turn_on:
          service: rest_command.tablet_mbr_screen_on
        turn_off:
          service: rest_command.tablet_mbr_screen_off
        set_level:
          service: script.tablet_mbr_screen_value
          data_template:
            brightness: "{{ brightness }}"

rest_command:
  tablet_mbr_screen_on:
    url: 'http://KioskIP:2323/?cmd=screenOn&type=json&password=KisokPassword'
    method: post
  tablet_mbr_screen_off:
    url: 'http://KioskIP:2323/?cmd=screenOff&type=json&password=KisokPassword'
    method: post
  tablet_mbr_screen_value:
    url: 'http://KioskIP:2323/?cmd=setStringSetting&key=screenBrightness&value={{states("input_number.tablet_mbr_temp_screen_brightness") | int }}&type=json&password=KisokPassword'
    method: post

  tablet_mbr_url_bed:
    url: 'http://KioskIP:2323/?cmd=loadURL&url=http://DashboardIP/{{ states("input_select.tablet_mbr_dash_select") }}&type=json&password=KisokPassword'
    method: post

input_select:
  tablet_mbr_dash_select:
    name: Dash Display
    icon: mdi:tablet
    initial: "-"
    options:
    - "-"
    - bedroom
    - laundry
    - doorbell
    - fire_menu
    - den

input_number:
  tablet_mbr_temp_screen_brightness:
    name: tablet_mbr_temp_screen_brightness
    initial: 128
    min: 0
    max: 255
    step: 1

sensor:
  - platform: rest
    name: tablet_mbr_battery_level
    json_attributes:
      - batteryLevel
    resource: http://KioskIP:2323/?cmd=deviceInfo&type=json&password=KisokPassword
    value_template: '{{ value_json.batteryLevel }}'
    unit_of_measurement: '%'

  - platform: rest
    name: tablet_mbr_screen_brightness
    json_attributes:
      - screenBrightness
    resource: http://KioskIP:2323/?cmd=deviceInfo&type=json&password=KisokPassword
    value_template: '{{ value_json.screenBrightness }}'

binary_sensor:
  - platform: rest
    name: tablet_mbr_screen_on
    json_attributes:
      - isScreenOn
    resource: http://KioskIP:2323/?cmd=deviceInfo&type=json&password=KisokPassword
    value_template: '{{ value_json.isScreenOn }}'

  - platform: rest
    name: tablet_mbr_plugged_in
    json_attributes:
      - plugged
    resource: http://KioskIP:2323/?cmd=deviceInfo&type=json&password=KisokPassword
    value_template: '{{ value_json.plugged }}'

media_player:
  - platform: mpd
    name: mbr_tablet_mpd
    host: KioskIP

automation:
  - id: tablet_mbr_change_url
    alias: Tablet Master Bedroom Change URL
    trigger:
      platform: state
      entity_id: input_select.tablet_mbr_dash_select
    condition:
      condition: template
      value_template: '{{ not is_state("input_select.tablet_mbr_dash_select", "-") }}'
    action:
    - service: rest_command.tablet_mbr_url_bed
      entity_id: rest_command.tablet_mbr_url_bed
    - service: input_select.select_option
      data:
        entity_id: input_select.tablet_mbr_dash_select
        option: "-"

  - id: tablet_mbr_display_doorbell
    alias: Display in Master Bedroom when doorbell activated
    trigger:
      platform: state
      entity_id: binary_sensor.door_bell
      to: 'on'
    action:
    - service: input_select.select_option
      data:
        entity_id: input_select.tablet_mbr_dash_select
        option: "doorbell"

script:
  tablet_mbr_screen_value:
    sequence:
      - service: input_number.set_value
        data_template:
          entity_id: input_number.tablet_mbr_temp_screen_brightness
          value: "{{ brightness }}"
      - service: rest_command.tablet_mbr_screen_value

group:
  tablet_mbr:
    name: Tablet Master Bedroom
    control: hidden
    entities:
      - light.tablet_mbr_screen
      - input_select.tablet_mbr_dash_select
      - sensor.tablet_mbr_battery_level
      - binary_sensor.tablet_mbr_plugged_in
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