Add pellet statistics

[lein1013]

Adding new modbus values available since V23.010

• Pellet usage since last storage fill (in kg)
• pellet usage total (since upgrade to Version 21.050 or newer) (in kg)
• generated heat energy (total) (in kWh)
• reset pellet storage filled (flag)

[LavermanJJ]

Hi @lein1013
Thanks for your PR! I'll have a closer look tonight. Unfortunately, I don't have a Pelletsboiler to verify.

Do you have the latest specification at hand, so you could share it?

Would you also want to add the entities in https://github.com/LavermanJJ/home-assistant-solarfocus ?

-Jeroen

[lein1013]

Hi @LavermanJJ,
I got the information directly from the solarfocus support. I'll ask if they have this information somewhere public available.
I've also added the entities in my fork (https://github.com/lein1013/home-assistant-solarfocus), but there I did not develop the code in a way, that I can do a pull request without breaking existing code. But maybe we shall consider some refactoring there.
Testing the HACs integration was easy, because I could use my fork. For the python package, I would need to investigate more how to do this.
Hence, I plan to test the sensor first with the modbus integration of Home Assistant:

modbus:
  - name: "solarfocus"
    type: tcp
    host: xxxxxx
    port: 502
    sensors:
      - name: Pelletsverbrauch
        unit_of_measurement: kg
        slave: 2
        address: 2814