Modbus sensor min_value only allows positive values

[schliflo]

The problem

With the 2024.2.0 update, i can no longer configure a negative min_value for modbus sensor entitties.
Example config that was working with 2024.1.6

What version of Home Assistant Core has the issue?

2024.2.0

What was the last working version of Home Assistant Core?

2024.1.6

What type of installation are you running?

Home Assistant Supervised

Integration causing the issue

modbus

Link to integration documentation on our website

https://www.home-assistant.io/integrations/modbus/#configuring-sensor-entities

Diagnostics information

No response

Example YAML snippet

name: "modbus_ovum"
type: tcp
host: 10.10.20.21
port: 502
delay: 2
message_wait_milliseconds: 0
timeout: 5
sensors:
  - name: "Wärmepumpe: PVWatch Leistung (PvWa #12378)"
    unique_id: ovum_PvWa_sensor12378
    address: 12378
    scan_interval: 15
    data_type: int32
    scale: 0.01
    precision: 2
    swap: word
    unit_of_measurement: "kW"
    input_type: holding
    min_value: -32768
    max_value: 32767
    slave: 247
    device_class: power

Anything in the logs that might be useful for us?

No response

Additional information

No response

[home-assistant]

Hey there @janiversen, mind taking a look at this issue as it has been labeled with an integration (modbus) you are listed as a code owner for? Thanks!

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[supermario79]

Hi there!
I believe the issue is broader, not only for min_value.
I have similar issue with "scale" in my modbus.yaml:

  - name: "Consumption"
    scan_interval: 1
    unit_of_measurement: "kW"
    slave: 100
    address: 817 
    scale: -0.001
    precision: 2
    device_class: "power"

before 2024.2.0 it worked as expected, now I get this:
Invalid config for 'modbus' at modbus.yaml, line 26: value must be at least 0 for dictionary value 'modbus->0->sensors->1->scale', got -0.001

I want my consumption to be displayed as negative, I have solars producing the energy in positive values, so it displays on the charts together in a logical way.

I can always change the scale to positive, and then create a sensor with value template in configuration.yaml... Is there any other way I can negate the modbus sensor value?

[janiversen]

"scale" is different, and a PR have just been merged on dev.

[schliflo]

Thank you for the immediate fix @janiversen - can confirm everything is working as inteneded agin 👍🎉