HowTo? Re/Set Riemann integration?

cku · August 17, 2021, 1:54pm

Hi,

base on the new energy integration I use the “Riemann sum integral” integration to calulate time based kWh based on Watt pulses.

While configuring all, I defined some inputs the wrong way, so the “Riemann sum” explodes in very large number.

I will not use the “utility meter” to reset the value, because I will fix it.

Using set state will be overwritten by the running integration instance.
Also disalbe the integration (remove the entry from configuration.yaml) → restating HA → delete all entries from database (states and statistic tables) → add the integration → restarting HA again - ends up with the same invalid value :(. Where it comes from?

The sensor.py source code unsing
state = await self.async_get_last_state()
but I dont know how to minipulate that or the internal
self._state.

Also I will fix the state by time, if the Riemann sum runs out of sync with my
electricity meter.

Thx

cku · September 2, 2021, 4:57am

Answer found here:

ssh to home asstant
ha core stop
edit /config/.storage/core.restore_state
ha core start

Reason:
The sensor read the last state on startup and polling / overwriting it sometimes.
Also the RestoreState class writes all state known states down on tear down / ha stop.

If you overwrite a state via the states dev tool or the API, it will not impact the actual device. If the device state is being polled, it will overwrite the state in the state machine the next polling.

github.com

home-assistant/core/blob/cb1e0666c8678c38d683312850d8581dc0013962/homeassistant/components/integration/sensor.py#L197


      
                  except ValueError as err:
                      _LOGGER.warning("While calculating integration: %s", err)
                  except DecimalException as err:
                      _LOGGER.warning(
                          "Invalid state (%s > %s): %s", old_state.state, new_state.state, err
                      )
                  except AssertionError as err:
                      _LOGGER.error("Could not calculate integral: %s", err)
                  else:
                      self._state += integral
                      self.async_write_ha_state()
          
              async_track_state_change_event(
                  self.hass, [self._sensor_source_id], calc_integration
              )
          
          @property
          def name(self):
              """Return the name of the sensor."""
              return self._name

github.com

home-assistant/core/blob/cb1e0666c8678c38d683312850d8581dc0013962/homeassistant/helpers/restore_state.py#L160


      
                      continue
          
                  # Don't save old states that have expired
                  if stored_state.last_seen < expiration_time:
                      continue
          
                  stored_states.append(stored_state)
          
              return stored_states
          
          async def async_dump_states(self) -> None:
              """Save the current state machine to storage."""
              _LOGGER.debug("Dumping states")
              try:
                  await self.store.async_save(
                      [
                          stored_state.as_dict()
                          for stored_state in self.async_get_stored_states()
                      ]
                  )
              except HomeAssistantError as exc:

SpikeyGG · October 22, 2023, 9:16pm

@cku, I’d just like to publicly thank you for sharing that awesome 4-step approach to changing a stored value. I want you to know that I’ve favorited your post and I have referred back to it two or three times now in the last couple of years and plan to continue referring to it into the future – I can’t seem to remember these steps.