• I have read the README.md file and visited the Documentation to see if the information there helps.

Action description
I am trying to add a SHT4x temperature and humidity sensor into Home Assistant via MQTT, using mqtt-io and the config.yml file on a Raspberry Pi 4B.
Using the examples from the SHT4x github examples if I change the I2C address from 0x44 to 0x45, I see the serial number, the temperature and humidity via terminal.
I need a way to change the I2C address in the config.yml file, because mqtt-io looks for 0x44.

Previous attempts
In the config.yml file I have tried "i2c_bus_num: 1" and "i2c_address: 0x45".
I've changed 'i2c_address: 0x45' to just 'address: 0x45'.
I've done away with the 'i2c_bus_num: 1' line too.
I don't know the correct terminology to be able to change the address to 0x45

Error messages and traceback

mqtt_io.exceptions.ConfigValidationFailed: Config did not validate:
chip_addr:
- unknown field
i2c_bus_num:
- unknown field

Config

mqtt:
  host: homeassistant.local
  user: put_user_here
  password: put_password_here

gpio_modules:
  - name: rpi 
    module: raspberrypi

digital_outputs:
  - name: fan_gpio_12 
    module: rpi
    pin: 12
    on_payload: "ON"
    off_payload: "OFF"

sensor_modules:
  - name: i2c_sensirion
    module: sht4x
    i2c_bus_num: 1
    chip_addr: 0x45

sensor_inputs:
  - name: pi2_temperature
    module: i2c_sensirion
    mqtt_topic:
      state_topic: "/sensor/pi2/temp"
  - name: pi2_humidity
    module: i2c_sensirion
    mqtt_topic:
      state_topic: "/sensor/pi2/humidity"

Hardware

• Platform: [e.g. Raspberry Pi 4B]
• Connected hardware: [Sensirion SHT4x]

System:

• OS: [e.g. Raspbian]
• Python version: [Python 3.13.5]
• User you're running as: [e.g. root, pi]
• Using a virtualenv?: yes

Additional context
The SHT4x is an acknowledged sensor in the 'Sensors' list on the github page. Cool.
How do I change the default i2c address from 0x44 to 0x45?

Thanks for any help.