I2C based light with dimming

dimmer_test.yaml

################################################################
## Packages / Dimmer Test
##
## @description I2C based light with dimming
## @component   input_number, light, shell_command
## @license     MIT
## @author      Dale Higgs <@dale3h>
################################################################

################################################
## Customize
################################################

homeassistant:
  customize:
    input_number.dimmer_test_brightness:
      hidden: true

################################################
## Input Number
################################################

input_number:
  dimmer_test_brightness:
    name: "Dimmer Test Brightness"
    initial: 255
    min: 1
    max: 255
    step: 1

################################################
## Light
################################################

light:
  - platform: template
    lights:
      dimmer_test:
        friendly_name: "Dimmer Test"
        level_template: "{{ states('input_number.dimmer_test_brightness')|int }}"
        turn_on:
          - service: shell_command.dimmer_test
            data_template:
              previous: 0
              brightness: "{{ states('input_number.dimmer_test_brightness')|int(255) }}"
        turn_off:
          - service: shell_command.dimmer_test
            data_template:
              brightness: 0
        set_level:
          - service: shell_command.dimmer_test
            data_template:
              brightness: "{{ brightness|int }}"
          - service: input_number.set_value
            data_template:
              entity_id: input_number.dimmer_test_brightness
              value: "{{ brightness|int }}"

################################################
## Shell Command
################################################

shell_command:
  dimmer_test: >-
    python3 /home/homeassistant/.homeassistant/python_scripts/rpi_i2c.py {{ (previous|default(states('input_number.dimmer_test_brightness')|int(255))|int * (100 / 255))|round }} {{ (brightness|int * (100 / 255))|round }}