Suggestion for illuminance change in common/everything-presence-lite-base.yaml

[ChristianRiesen]

I have used a personal cobbled together presence (and illuminance) sensor before the lite came out and now replaced them all with the lite. Currently in the process of updating the configs as I do that by hand and came across this bit that I would like to offer as a suggestion to change it for the illuminance sensor. Instead of just making a pull request, I thought bringing it here first for a discussion would be a better way.

https://github.com/EverythingSmartHome/everything-presence-lite/blob/3dd563d5627b79cecd6edfa84250158d469ade05/common/everything-presence-lite-base.yaml#L66C1-L75C23

Basically change it from the above to this:

  - platform: bh1750
    name: Illuminance
    id: illuminance_sensor
    i2c_id: bus_a
    address: 0x23
    update_interval: "1s"
    accuracy_decimals: 1
    filters:
      - lambda: "return x + id(illuminance_offset_ui).state;"
      - delta: 1
      - clamp:
          min_value: 0

There are a couple small changes that I think would make the system much better.

1. Add accuracy to 1 digit decimals. Everything below that is noise and not really useful.
2. Add delta 1 filter, this means the sensor keeps reading, but only sends to HA when the lux changes 1 lux or more. Or in other words, only send to HA when there is a reason to send. Keeps spam low yet updates very quickly when there is a change.
3. Set frequency to 1s for reads, abandoning the setting. With the delta above this is just no longer needed. I experimented with lower settings, but so far have not had much luck with below 1s readings. Specs say the sensor has a read time of 120 ms in the slowest mode (not sure which mode is used) so maybe quicker reads would work as well. In my testing I got some inconsistent results so I just left it at 1s for now.

The removal of a variable that is not needed, while getting less spam on HA or the network in general, yet have fast (1s) reactions on even modest light changes, I think would be an overall win for the presence lite.

Thoughts?