How change UoM, create calac field and display date?

[kzajac83]

Hello.

Try change UoM from kWh -> GJ but code fail, in loga I have:

[23:46:04][W][wmbus:154]: Can't get requested field 'target_energy_consumption' with unit 'GJ'

In fact this is true because my UoM is kWh not GJ but please look at my code, contain two entities:

1. Historical value, correctly dispaly in HA and process in ESPHome
2. The same, bu try convert value and UoM kWh -> GJ, finally fail in ESPHome, no data in HA

I work based on this doc https://esphome.io/components/sensor/#sensor-filters however not only I'd like convert value but also change UoM kWh-> GJ to display correct in HA. How to achieve?

      - name: "PEC total target energy BR"
        field: "target_energy_consumption"
        accuracy_decimals: 3
        unit_of_measurement: "kWh"
        device_class: "energy"
        state_class: "total_increasing"
        icon: "mdi:energy"
        filters:
          - offset: 0.0
      - name: "PEC total target GJ energy BR"
        field: "target_energy_consumption"
        accuracy_decimals: 3
        filters:
          - lambda: return x / 277.778;
          - offset: 0.0
        unit_of_measurement: "GJ"
        device_class: "energy"
        state_class: "total_increasing"
        icon: "mdi:energy"

Additional have two temperature, input and output from heat meter:

[23:46:04][V][sensor:043]: 'PEC t1 BR': Received new state 83.300003
[23:46:04][D][sensor:094]: 'PEC t1 BR': Sending state 83.30000 °C with 1 decimals of accuracy

[23:46:04][V][sensor:043]: 'PEC t2 BR': Received new state 58.700001
[23:46:04][D][sensor:094]: 'PEC t2 BR': Sending state 58.70000 °C with 1 decimals of accuracy

How to create 3rd calculated new entity in ESPHome as difference diff=t2-t1 with UoM = "K" or "degC"?

On the end how correctly display date? I getting this info in ESPHome:

[00:10:48][V][sensor:043]: 'PEC target date BR': Received new state 1735599616.000000
[00:10:48][D][sensor:094]: 'PEC target date BR': Sending state 1735599616.00000 date with 0 decimals of accuracy

The code is:

     - name: "PEC target date BR"
        field: "target"
        unit_of_measurement: "date"
        device_class: "date"

but nothing in HA

BR, Krzysiek