Incorrect timestamp format for Home Assistant

[m4skime]

Select Add-On (place a lowercase x for the relevant add-on)

• [ x ] Xiaomi Mi Scale

Describe the bug
the timestamp is not timezoned, so home assistant cannot convert it

To Reproduce
xiaomi mi scale v0.2.7
mqtt 6.0.1
xiaomi composition scale 2
Home assistant 2022.2.0

Expected behaviour
a correct timestamp

Screenshots

Scale (please complete the following information):

• Name : Mi Body Composition Scale 2
• Model : XMTZC05HM

Device running Home Assistant (please complete the following information):
-virtual machine

• usb dongle

Additional context

my sensor configuration :

- platform: mqtt
  name: "Max Derniere pesee"
  state_topic: "miscale/Max/weight"
  value_template: "{{ value_json['timestamp'] }}"
  device_class: timestamp
  icon: mdi:calendar-clock

the logs :

Exception in message_received when handling msg on 'miscale/Max/weight':
'{"weight":109.50,"weight_unit":"kg","bmi":32.34,"basal_metabolism":2038.10,"visceral_fat":27.91,"lean_body_mass":72.78,"body_fat":34.26,"water":46.94,"bone_mass":3.67,"muscle_mass":68.31,"protein":15.45,"body_type":"Thick-set","metabolic_age":56,"timestamp":"2022-01-04 21:39:00.655824"}'
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/mqtt/debug_info.py", line 37, in wrapper msg_callback(msg)
File "/usr/src/homeassistant/homeassistant/components/mqtt/sensor.py", line 280, in message_received self.async_write_ha_state()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 530, in async_write_ha_state self._async_write_ha_state()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 563, in _async_write_ha_state state = self._stringify_state()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 536, in _stringify_state if (state := self.state) is None:
File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 419, in state raise ValueError( ValueError: Invalid datetime: sensor.max_derniere_pesee provides state '2022-01-04 21:39:00.655824', which is missing timezone information

and

Logger: homeassistant.components.sensor
Source: components/sensor/__init__.py:419
Integration: Sensor ([documentation](https://www.home-assistant.io/integrations/sensor), [issues](https://github.com/home-assistant/home-assistant/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+sensor%22))
First occurred: 3:06:59 PM (6 occurrences)
Last logged: 3:07:00 PM

Error adding entities for domain sensor with platform mqtt
Error while setting up mqtt platform for sensor
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 382, in async_add_entities
    await asyncio.gather(*tasks)
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 614, in _async_add_entity
    await entity.add_to_platform_finish()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 773, in add_to_platform_finish
    self.async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 530, in async_write_ha_state
    self._async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 563, in _async_write_ha_state
    state = self._stringify_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 536, in _stringify_state
    if (state := self.state) is None:
  File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 419, in state
    raise ValueError(
ValueError: Invalid datetime: sensor.max_derniere_pesee provides state '2022-01-04 21:39:00.655824', which is missing timezone information

[lolouk44]

Thanks. Fixed in 0.2.8