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Retrieving all entities of a specific device_class #356
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Hi!
I am finally planning on pushing a notification when any of my battery-powered devices is getting low. For that to work I need to get all entities that have the device_class battery (or at least have battery in the entitiy_id).
Has anyone already done that and can share some scripts?
What would be the correct approach? Is it iterating over all results from state.names(...) ?
Thank in advance for any hints!
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Replies: 2 comments
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Repinging this thread from almost 3 years ago, I couldn't find an answer anywhere but I'd love to be able to do this as well in pyscript. E.g. I have a bunch of binary sensors for my door and windows. The binary_sensors are from KNX and in KNX they get the device_class door:
- name: Livingroom
state_address: 2/1/1
device_class: door
sync_state: true
Now the following YAML code works well to give my a markdown list of strings for all open doors (state == 'on', device_class=='door):
{%- for x in states.binary_sensor | selectattr('attributes.device_class', 'defined') | selectattr('state','eq','on') %}
{%- if "door" in x.attributes.device_class %}
## <ha-icon icon="mdi:door-open"></ha-icon> {{ x.name | trim }} is open
{%- endif -%}
{%- endfor -%}
in pyscript this then becomes:
def doors_open_in_markdown():
doors_open=""
for x in state.names("binary_sensor"):
if state.get(x) == 'on':
if len(doors_open) > 0: doors_open +="\n"
try: friendly_name = state.getattr(x)['friendly_name'].strip()
except KeyError: pass
doors_open=doors_open+f"### <ha-icon icon='mdi:door-open'></ha-icon> {friendly_name} is open"
return doors_open
But that gives me all binary_sensors in the house that are 'on', not just the door sensors because I can't filter for device_class, any suggestions other than playing with filtering based on entity_ids or the actual names that then need to match some specific pattern instead of filtering for the right device_class? I would hate to do that since a) the right information is of course there somewhere and b) it is error prone if some name happens to match the filters... Thanks!
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I get all entities with state.names() filter them out, and join them in a group.batteries with group.set(object_id=group_entity_id, entities=filtered_entities)
my regex filters are:
- "^.*(nominal|voltage|chemistry|setpoint|date|sensitivity|runtime|count|health|state|temp|temperature|power|battery_power|power_meter|replaced|battery_type|last_replaced|total_out_power|total_in_power|active_power|group|battery_last_replaced).*$"
- "^.*(battery_power|power_meter|total_out_power|total_in_power|active_power|_battery_last_replaced|_battery_type)$"
- "sensor\\..*last_replaced.*"
- "sensor\\..*_battery_plus"
then there's a cron function
BATTERY_CHARGE_TRIGGER_LEVEL = 30 @time_trigger('once(10:00:00)') @state_active("input_boolean.battery_low_notification == 'on'") def func_battery(): msg = '🪫' send = False group_entity = entity('group.batteries_group') battery_entity_ids = group_entity.attrs().get('entity_id', []) for entity_id in battery_entity_ids: entity_ = entity(entity_id) entity_state = entity_.state() if not str(entity_state).isnumeric(): continue entity_state = int(entity_state) if entity_state < BATTERY_CHARGE_TRIGGER_LEVEL: entity_fn = entity_.friendly_name() msg += f"\n{entity_fn}\n{entity_id}\n{entity_state}" send = True if send: tools.telegram_message(msg, disable_notification=True)
the function cannot be used as is, but you get the idea.
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