mirror of https://github.com/home-assistant/core
77 lines
2.3 KiB
Python
77 lines
2.3 KiB
Python
"""Support for LIRC devices."""
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# pylint: disable=import-error
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import logging
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import threading
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import time
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import lirc
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from homeassistant.const import EVENT_HOMEASSISTANT_START, EVENT_HOMEASSISTANT_STOP
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from homeassistant.core import HomeAssistant
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from homeassistant.helpers.typing import ConfigType
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_LOGGER = logging.getLogger(__name__)
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BUTTON_NAME = "button_name"
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DOMAIN = "lirc"
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EVENT_IR_COMMAND_RECEIVED = "ir_command_received"
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ICON = "mdi:remote"
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def setup(hass: HomeAssistant, config: ConfigType) -> bool:
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"""Set up the LIRC capability."""
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# blocking=True gives unexpected behavior (multiple responses for 1 press)
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# also by not blocking, we allow hass to shut down the thread gracefully
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# on exit.
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lirc.init("home-assistant", blocking=False)
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lirc_interface = LircInterface(hass)
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def _start_lirc(_event):
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lirc_interface.start()
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def _stop_lirc(_event):
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lirc_interface.stopped.set()
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hass.bus.listen_once(EVENT_HOMEASSISTANT_START, _start_lirc)
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hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, _stop_lirc)
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return True
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class LircInterface(threading.Thread):
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"""This interfaces with the lirc daemon to read IR commands.
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When using lirc in blocking mode, sometimes repeated commands get produced
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in the next read of a command so we use a thread here to just wait
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around until a non-empty response is obtained from lirc.
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"""
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def __init__(self, hass):
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"""Construct a LIRC interface object."""
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threading.Thread.__init__(self)
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self.daemon = True
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self.stopped = threading.Event()
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self.hass = hass
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def run(self):
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"""Run the loop of the LIRC interface thread."""
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_LOGGER.debug("LIRC interface thread started")
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while not self.stopped.is_set():
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try:
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code = lirc.nextcode() # list; empty if no buttons pressed
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except lirc.NextCodeError:
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_LOGGER.warning("Error reading next code from LIRC")
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code = None
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# interpret result from python-lirc
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if code:
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code = code[0]
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_LOGGER.info("Got new LIRC code %s", code)
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self.hass.bus.fire(EVENT_IR_COMMAND_RECEIVED, {BUTTON_NAME: code})
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else:
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time.sleep(0.2)
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lirc.deinit()
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_LOGGER.debug("LIRC interface thread stopped")
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