Need python help getting the state of another entity

alexholman · March 13, 2018, 1:36am

I’m experimenting with writing a simple entity that grabs the state of another entity. As an experiment I’ve started by modifying the generic temperature sensor to pull the temperature value out of the state of my heatpump entity. However, the code I’m currently testing returns None as the state value. See line 72 of the code posted here:

github.com

alexholman/home_assistant/blob/master/custom_components/sensor/heatpump_temp.py

"""
Platform to produce a sensor based on the temperature readings
provided by a mitsubishi_mqtt entity
"""
import asyncio
import logging

from homeassistant.core import callback
from homeassistant.const import TEMP_FAHRENHEIT

import voluptuous as vol

import homeassistant.helpers.config_validation as cv
from homeassistant.components.sensor import PLATFORM_SCHEMA
from homeassistant.const import CONF_NAME
from homeassistant.helpers.entity import Entity
from homeassistant.helpers.event import async_track_state_change

_LOGGER = logging.getLogger(__name__)

This file has been truncated. show original

and the logs returned:

2018-03-11 04:05:23 WARNING (MainThread) [custom_components.sensor.heatpump_temp] hp name: climate.1st_fl_heatpump, state: None
2018-03-11 04:05:24 ERROR (MainThread) [homeassistant.components.sensor] Error on device update!
Traceback (most recent call last):
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/helpers/entity_component.py", line 217, in async_add_entity
    yield from entity.async_device_update(warning=False)
  File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/helpers/entity.py", line 304, in async_device_update
    yield from self.async_update()
  File "/usr/lib/python3.5/asyncio/coroutines.py", line 210, in coro
    res = func(*args, **kw)
  File "/home/homeassistant/.homeassistant/custom_components/sensor/heatpump_temp.py", line 75, in async_update
    self._state = heatpump_states.attributes.get('current_temperature')
AttributeError: 'NoneType' object has no attribute 'attributes'

From the logs, when I try to output what I would hope would be a state object, I get None, then error out when I try to look for attributes in a None.
I’ve verified by cut and paste that climate.1st_fl_heatpump is an entity in my States > Entities page of HA.

alexholman · March 13, 2018, 3:11am

UPDATE:
Still having problems, and it gets a little weirder. I have a bunch of entities that show up in my States window on HA. However when add the line:

_LOGGER.warning('all states: {0}'.format(self._hass.states.async_entity_ids() ))

I only see:

all states: ['sun.sun', 'group.kids_rooms']

Why doesn’t the hass.states object that I’m querying seem to contain all the states that my HA seems to have?