Hello,
I have a pelet heater who send me the pelet consommation.
I use a utilitimeter entite who is reseted to zero avery day.
I have made a dashbord with information of consomation over the day,the week , the month… and since last time I refill the buffer, works as espected.
Look like this :
all card are statistics card.
I fill my buffer one time per year so I use long therm statistics.
My question is how can I have a notification (mail or telegram (alredy setups)) when the value since las refill fromm the buffer is over a value (2000 kg for ex)
If its possible I woul like to use node red for that but I m open for all solution
For the utility meter that contains the value since you last refilled the buffer: that should be configured without a reset cycle. And whenever you refill the buffer, you should have a way to manually reset that to zero (for example with a button on your dashboard).
Triggering a notification would be as simple as making an automation that triggers when the utility meter goes above 2000kg. I don’t use node red but I assume that it is trivial to do. In HA it’s just an automation with a numeric_state trigger.
in this case a need to make a second utilimeter only for that
Is that the only way ? I previously used Jeedom and for this kind a feature it was possible to maque a php script to make a history request for long time
I just try with the second tulity meter only for that, the value only take the pellet consuption since a create the utility meter tha mean until I refill the buffer I will not have a realistic value, I will chec the documentation from the sql sensor
hello
in the meantime I studied SQL integration
thanks to the documentation , the forum, my new best freind, in those cases, chat_gpt and my basic knowlage from SQL query , I create a SQL query for the complet calculation. one of the avantage from the query il also that I can use an input_datetime entity for select the refill date from the buffer (more flexible in case of mistake)
SELECT
(last_value.sum - first_value.sum) AS difference
FROM
(
SELECT
sum
FROM statistics
WHERE
metadata_id = (
SELECT id FROM statistics_meta WHERE statistic_id = 'sensor.consommation_pellets'
)
AND start_ts >= strftime('%s', (
SELECT states.state
FROM states
WHERE metadata_id = (
SELECT metadata_id
FROM states_meta
WHERE entity_id = 'input_datetime.remplissage_silot_pellet'
)
ORDER BY state_id DESC LIMIT 1
))
ORDER BY start_ts ASC
LIMIT 1
) AS first_value,
(
SELECT
sum
FROM statistics_short_term
WHERE
metadata_id = (
SELECT id FROM statistics_meta WHERE statistic_id = 'sensor.consommation_pellets'
)
AND start_ts <= strftime('%s', 'now')
ORDER BY start_ts DESC
LIMIT 1
) AS last_value
LIMIT 1;
the message generation inside node red is yet not an issue for me
and my basic knowlage from SQL query , I create a SQL query for the complet calculation. one of the avantage from the query il also that I can use an input_datetime entity for select the refill date from the buffer (more flexible in case of mistake)