KNX.send DTP 9.001 (temperature) conversion not ok

[SquaredCircleHunter]

The problem

I want to update a temperature group object with a non integer value. The KNX.send service drops the fractional part when converting based on data type "temperature".

Environment

• Home Assistant Core release with the issue: 2020.12.2
• Last working Home Assistant Core release (if known):
• Operating environment (OS/Container/Supervised/Core): Home Assistant OS 5.4.84
• Integration causing this issue: KNX
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/knx

Problem-relevant configuration.yaml

Trigger:

  platform: event
      event_type: state_changed
      event_data:
        entity_id: input_number.vvw_setpoint_value_leefruimte

Action, doesnt work correctly -> drops fractional part:

    service: knx.send
    data_template:
      address: 5/1/1
      payload: "{{ trigger.event.data.new_state.state }}"
      type: temperature

Action, works correctly -> workaround crafted for my specific use case (ie. positive temperatures below 40,5°C where fractional part is 0 or 1/2):

    service: knx.send
    data_template:
      address: 5/1/1
      payload: ["{{ 8 + ( trigger.event.data.new_state.state|float * 50 )|int // 256 }}", "{{ ( trigger.event.data.new_state.state|float * 50 )|int % 256 }}"]

Traceback/Error logs

n/a

Additional information

[probot-home-assistant]

knx documentation
knx source
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[probot-home-assistant]

Hey there @Julius2342, @farmio, @marvin-w, mind taking a look at this issue as its been labeled with an integration (knx) you are listed as a codeowner for? Thanks!
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[farmio]

Have you tried casting the state to float in the template?

[SquaredCircleHunter]

Hi,

That doesn't work neither:

  action:
    service: knx.send
    data_template:
      address: 5/1/9
      payload: "{{ trigger.event.data.new_state.state|float }}"
      type: temperature

In the ETS monitor I see 23 as incoming value

From the event trace:

{ "event_type": "call_service", "data": { "domain": "input_number", "service": "set_value", "service_data": { "value": 23.5, "entity_id": "input_number.vvw_setpoint_value_garage" } }, "origin": "LOCAL", "time_fired": "2021-01-03T17:27:25.242365+00:00", "context": { "id": "4586facb2fcfa334ddd3582230f503eb", "parent_id": null, "user_id": "fec541f9ca6b41e3b781ec769831d5ab" } }

{ "event_type": "call_service", "data": { "domain": "knx", "service": "send", "service_data": { "address": "5/1/9", "payload": 23.5, "type": "temperature" } }, "origin": "LOCAL", "time_fired": "2021-01-03T17:27:25.262404+00:00", "context": { "id": "60e5a9c22b3e69330391a7d2fb21d5ed", "parent_id": "4586facb2fcfa334ddd3582230f503eb", "user_id": null } }

[farmio]

Thanks! There was an error in our schema which coerced every value to int.

[SquaredCircleHunter]

Thanks guys for the fast response!