decode payload in HA knx_event

[farmio]

Description

decode payload in HA knx_event

TODO:

• we should add configuration to map group addresses to value_types from yaml too
• binary is not accepted currently
• I have not tried DPT3 types yet
• source the xknx device-tree for group addresses and value_types so already configured gas (eg in sensors) don't have to be configured twice (this could as well be a nice function within xknx)

A configuration key is added to map group addresses to value types (like they are used in sensors).

knx:
  event_filter: ["0/0/*"]
  event_dpt_map:
    "0/0/100": [5, 1]
    "0/0/101": "temperature"
    "0/0/102": 9

#497

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• I have performed a self-review of my own code
• The documentation has been adjusted accordingly
• The changes generate no new warnings
• Tests have been added that prove the fix is effective or that the feature works
• The changes are documented in the changelog
• The Homeassistant plugin has been adjusted in case of new config options

[coveralls]

Coverage remained the same at 94.862% when pulling 0df12ee on farmio:dynamic_knx_event into 725e787 on XKNX:master.

[marvin-w]

I like this, looks good for me

[farmio]

see home-assistant/core#57621