Open
Description
The problem
MqttSensor does not accept µs as native unit of measurement. I expected this to work after #140307 was accepted.
2025-04-24 15:14:28.879 WARNING (MainThread) [homeassistant.components.sensor] Entity
sensor.modulator_test_pulse_length (<class 'homeassistant.components.mqtt.sensor.MqttSensor'>)
is using native unit of measurement 'µs' which is not a valid unit for the device class ('duration')
it is using; expected one of ['s', 'μs', 'd', 'ms', 'h', 'min']; Please update your configuration if your
entity is manually configured, otherwise create a bug report at
https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue+label%3A%22integration%3A+mqtt%22
configuration yaml: ( sensor: !include_dir_merge_list mqtt/sensor/ )
- name: Modulator Test pulse length
unique_id: modulator_test_pulse_length
state_topic: "FELIX/modulator/test/SR_FastCall.IFB_FastTank.IFB_Digi.IFB_FwhmRead.atq_rRead"
unit_of_measurement: "µs"
suggested_display_precision: 1
device_class: duration
state_class: measurement
What version of Home Assistant Core has the issue?
core-2025.4.3
What was the last working version of Home Assistant Core?
No response
What type of installation are you running?
Home Assistant OS
Integration causing the issue
mqtt
Link to integration documentation on our website
https://www.home-assistant.io/integrations/sensor.mqtt/
Diagnostics information
No response
Example YAML snippet
Anything in the logs that might be useful for us?
2025-04-24 15:14:28.614 WARNING (MainThread) [homeassistant.components.mqtt.sensor]
The unit of measurement `µs` is not valid together with device class `duration`. this will stop working in HA Core 2025.7.0
Additional information
No response