/
rpi_gpio_pwm.py
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/
rpi_gpio_pwm.py
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"""Support for LED lights that can be controlled using PWM."""
import logging
import voluptuous as vol
from homeassistant.const import CONF_NAME, CONF_TYPE, STATE_ON, CONF_ADDRESS
from homeassistant.components.light import (
Light, ATTR_BRIGHTNESS, ATTR_HS_COLOR, ATTR_TRANSITION,
SUPPORT_BRIGHTNESS, SUPPORT_COLOR, SUPPORT_TRANSITION, PLATFORM_SCHEMA)
import homeassistant.helpers.config_validation as cv
import homeassistant.util.color as color_util
from homeassistant.helpers.restore_state import RestoreEntity
REQUIREMENTS = ['pwmled==1.4.1']
_LOGGER = logging.getLogger(__name__)
CONF_LEDS = 'leds'
CONF_DRIVER = 'driver'
CONF_PINS = 'pins'
CONF_FREQUENCY = 'frequency'
CONF_DRIVER_GPIO = 'gpio'
CONF_DRIVER_PCA9685 = 'pca9685'
CONF_DRIVER_TYPES = [CONF_DRIVER_GPIO, CONF_DRIVER_PCA9685]
CONF_LED_TYPE_SIMPLE = 'simple'
CONF_LED_TYPE_RGB = 'rgb'
CONF_LED_TYPE_RGBW = 'rgbw'
CONF_LED_TYPES = [CONF_LED_TYPE_SIMPLE, CONF_LED_TYPE_RGB, CONF_LED_TYPE_RGBW]
DEFAULT_BRIGHTNESS = 255
DEFAULT_COLOR = [0, 0]
SUPPORT_SIMPLE_LED = (SUPPORT_BRIGHTNESS | SUPPORT_TRANSITION)
SUPPORT_RGB_LED = (SUPPORT_BRIGHTNESS | SUPPORT_COLOR | SUPPORT_TRANSITION)
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
vol.Required(CONF_LEDS): vol.All(cv.ensure_list, [
{
vol.Required(CONF_NAME): cv.string,
vol.Required(CONF_DRIVER): vol.In(CONF_DRIVER_TYPES),
vol.Required(CONF_PINS):
vol.All(cv.ensure_list, [cv.positive_int]),
vol.Required(CONF_TYPE): vol.In(CONF_LED_TYPES),
vol.Optional(CONF_FREQUENCY): cv.positive_int,
vol.Optional(CONF_ADDRESS): cv.byte,
}
])
})
def setup_platform(hass, config, add_entities, discovery_info=None):
"""Set up the PWM LED lights."""
from pwmled.led import SimpleLed
from pwmled.led.rgb import RgbLed
from pwmled.led.rgbw import RgbwLed
from pwmled.driver.gpio import GpioDriver
from pwmled.driver.pca9685 import Pca9685Driver
leds = []
for led_conf in config[CONF_LEDS]:
driver_type = led_conf[CONF_DRIVER]
pins = led_conf[CONF_PINS]
opt_args = {}
if CONF_FREQUENCY in led_conf:
opt_args['freq'] = led_conf[CONF_FREQUENCY]
if driver_type == CONF_DRIVER_GPIO:
driver = GpioDriver(pins, **opt_args)
elif driver_type == CONF_DRIVER_PCA9685:
if CONF_ADDRESS in led_conf:
opt_args['address'] = led_conf[CONF_ADDRESS]
driver = Pca9685Driver(pins, **opt_args)
else:
_LOGGER.error("Invalid driver type")
return
name = led_conf[CONF_NAME]
led_type = led_conf[CONF_TYPE]
if led_type == CONF_LED_TYPE_SIMPLE:
led = PwmSimpleLed(SimpleLed(driver), name)
elif led_type == CONF_LED_TYPE_RGB:
led = PwmRgbLed(RgbLed(driver), name)
elif led_type == CONF_LED_TYPE_RGBW:
led = PwmRgbLed(RgbwLed(driver), name)
else:
_LOGGER.error("Invalid led type")
return
leds.append(led)
add_entities(leds)
class PwmSimpleLed(Light, RestoreEntity):
"""Representation of a simple one-color PWM LED."""
def __init__(self, led, name):
"""Initialize one-color PWM LED."""
self._led = led
self._name = name
self._is_on = False
self._brightness = DEFAULT_BRIGHTNESS
async def async_added_to_hass(self):
"""Handle entity about to be added to hass event."""
await super().async_added_to_hass()
last_state = await self.async_get_last_state()
if last_state:
self._is_on = (last_state.state == STATE_ON)
self._brightness = last_state.attributes.get('brightness',
DEFAULT_BRIGHTNESS)
self._led.set(is_on=self._is_on,
brightness=_from_hass_brightness(self._brightness))
@property
def should_poll(self):
"""No polling needed."""
return False
@property
def name(self):
"""Return the name of the group."""
return self._name
@property
def is_on(self):
"""Return true if device is on."""
return self._is_on
@property
def brightness(self):
"""Return the brightness property."""
return self._brightness
@property
def supported_features(self):
"""Flag supported features."""
return SUPPORT_SIMPLE_LED
def turn_on(self, **kwargs):
"""Turn on a led."""
if ATTR_BRIGHTNESS in kwargs:
self._brightness = kwargs[ATTR_BRIGHTNESS]
if ATTR_TRANSITION in kwargs:
transition_time = kwargs[ATTR_TRANSITION]
self._led.transition(
transition_time,
is_on=True,
brightness=_from_hass_brightness(self._brightness))
else:
self._led.set(is_on=True,
brightness=_from_hass_brightness(self._brightness))
self._is_on = True
self.schedule_update_ha_state()
def turn_off(self, **kwargs):
"""Turn off a LED."""
if self.is_on:
if ATTR_TRANSITION in kwargs:
transition_time = kwargs[ATTR_TRANSITION]
self._led.transition(transition_time, is_on=False)
else:
self._led.off()
self._is_on = False
self.schedule_update_ha_state()
class PwmRgbLed(PwmSimpleLed):
"""Representation of a RGB(W) PWM LED."""
def __init__(self, led, name):
"""Initialize a RGB(W) PWM LED."""
super().__init__(led, name)
self._color = DEFAULT_COLOR
async def async_added_to_hass(self):
"""Handle entity about to be added to hass event."""
await super().async_added_to_hass()
last_state = await self.async_get_last_state()
if last_state:
self._color = last_state.attributes.get('hs_color', DEFAULT_COLOR)
self._led.set(color=_from_hass_color(self._color))
@property
def hs_color(self):
"""Return the color property."""
return self._color
@property
def supported_features(self):
"""Flag supported features."""
return SUPPORT_RGB_LED
def turn_on(self, **kwargs):
"""Turn on a LED."""
if ATTR_HS_COLOR in kwargs:
self._color = kwargs[ATTR_HS_COLOR]
if ATTR_BRIGHTNESS in kwargs:
self._brightness = kwargs[ATTR_BRIGHTNESS]
if ATTR_TRANSITION in kwargs:
transition_time = kwargs[ATTR_TRANSITION]
self._led.transition(
transition_time,
is_on=True,
brightness=_from_hass_brightness(self._brightness),
color=_from_hass_color(self._color))
else:
self._led.set(is_on=True,
brightness=_from_hass_brightness(self._brightness),
color=_from_hass_color(self._color))
self._is_on = True
self.schedule_update_ha_state()
def _from_hass_brightness(brightness):
"""Convert Home Assistant brightness units to percentage."""
return brightness / 255
def _from_hass_color(color):
"""Convert Home Assistant RGB list to Color tuple."""
from pwmled import Color
rgb = color_util.color_hs_to_RGB(*color)
return Color(*tuple(rgb))