hass-core/homeassistant/components/pencom/switch.py
Ville Skyttä b4bac0f7a0
Exception chaining and wrapping improvements (#39320)
* Remove unnecessary exception re-wraps

* Preserve exception chains on re-raise

We slap "from cause" to almost all possible cases here. In some cases it
could conceivably be better to do "from None" if we really want to hide
the cause. However those should be in the minority, and "from cause"
should be an improvement over the corresponding raise without a "from"
in all cases anyway.

The only case where we raise from None here is in plex, where the
exception for an original invalid SSL cert is not the root cause for
failure to validate a newly fetched one.

Follow local convention on exception variable names if there is a
consistent one, otherwise `err` to match with majority of codebase.

* Fix mistaken re-wrap in homematicip_cloud/hap.py

Missed the difference between HmipConnectionError and
HmipcConnectionError.

* Do not hide original error on plex new cert validation error

Original is not the cause for the new one, but showing old in the
traceback is useful nevertheless.
2020-08-28 13:50:32 +02:00

98 lines
2.6 KiB
Python

"""Pencom relay control."""
import logging
from pencompy.pencompy import Pencompy
import voluptuous as vol
from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchEntity
from homeassistant.const import CONF_HOST, CONF_NAME, CONF_PORT
from homeassistant.exceptions import PlatformNotReady
import homeassistant.helpers.config_validation as cv
_LOGGER = logging.getLogger(__name__)
CONF_BOARDS = "boards"
CONF_BOARD = "board"
CONF_ADDR = "addr"
CONF_RELAYS = "relays"
RELAY_SCHEMA = vol.Schema(
{
vol.Required(CONF_NAME): cv.string,
vol.Required(CONF_ADDR): cv.positive_int,
vol.Optional(CONF_BOARD, default=0): cv.positive_int,
}
)
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
{
vol.Required(CONF_HOST): cv.string,
vol.Required(CONF_PORT): cv.port,
vol.Optional(CONF_BOARDS, default=1): cv.positive_int,
vol.Required(CONF_RELAYS): vol.All(cv.ensure_list, [RELAY_SCHEMA]),
}
)
def setup_platform(hass, config, add_entities, discovery_info=None):
"""Pencom relay platform (pencompy)."""
# Assign configuration variables.
host = config[CONF_HOST]
port = config[CONF_PORT]
boards = config[CONF_BOARDS]
# Setup connection
try:
hub = Pencompy(host, port, boards=boards)
except OSError as error:
_LOGGER.error("Could not connect to pencompy: %s", error)
raise PlatformNotReady from error
# Add devices.
devs = []
for relay in config[CONF_RELAYS]:
name = relay[CONF_NAME]
board = relay[CONF_BOARD]
addr = relay[CONF_ADDR]
devs.append(PencomRelay(hub, board, addr, name))
add_entities(devs, True)
class PencomRelay(SwitchEntity):
"""Representation of a pencom relay."""
def __init__(self, hub, board, addr, name):
"""Create a relay."""
self._hub = hub
self._board = board
self._addr = addr
self._name = name
self._state = None
@property
def name(self):
"""Relay name."""
return self._name
@property
def is_on(self):
"""Return a relay's state."""
return self._state
def turn_on(self, **kwargs):
"""Turn a relay on."""
self._hub.set(self._board, self._addr, True)
def turn_off(self, **kwargs):
"""Turn a relay off."""
self._hub.set(self._board, self._addr, False)
def update(self):
"""Refresh a relay's state."""
self._state = self._hub.get(self._board, self._addr)
@property
def device_state_attributes(self):
"""Return supported attributes."""
return {"board": self._board, "addr": self._addr}