Brightness method in custom light platform

Development
1

Hello everyone!

I tried to integrate light device to HA. But I couldn’t add brightness level to my platform like in this example Example Light Platform. Even if I add brightness method to my class, then in the UI the “Effect” is invisible - when I press it, it becomes visible. But this “Effect” doesn’t allow change brightness.

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Could someone help me to add brightness to my class?

Brightness doesn’t work even for minimal structure of light platform, without my custom device protocol. For example, file /custom_components/light/example_light.py is:

from homeassistant.components.light import ATTR_BRIGHTNESS, Light


def setup_platform(hass, config, add_devices, discovery_info=None):
    add_devices([MyExampleLight()])


class MyExampleLight(Light):

    def __init__(self,):
        self._name = "My example light"
        self._state = None
        self._brightness = None

    @property
    def name(self):
        return self._name

    @property
    def brightness(self):
        return self._brightness

    @property
    def is_on(self):
        return self._state

    def turn_on(self, **kwargs):
        self._brightness = kwargs.get(ATTR_BRIGHTNESS, 255)
        self._state = True

    def turn_off(self, **kwargs):
        self._state = False

    def update(self):
        pass

And configuration.yaml is:

light:
  - platform: example_light

Thank you in advance.

Roman

2

Your class misses supported_features property which should looks like this

@property_
def supported_features(self):
        """Flag supported features.
        This method is optional. Removing it indicates to Home Assistant
        that brightness is not supported for this light.
        """
        return SUPPORT_BRIGHTNESS  # or use 1 instead of the constant