Home Assistant Configuration for BuildAX Sensors

automations.yaml

- id: process_serial_data
  alias: Process Serial Data
  description: Process Data from the BAX sensors
  trigger:
  - platform: state
    entity_id: sensor.bax
  action:
  - service: python_script.process_serial_data
    data:
      data: '{{ trigger.to_state.state }}'

configuration.yaml

# Loads default set of integrations. Do not remove.
default_config:

# Load frontend themes from the themes folder
frontend:
  themes: !include_dir_merge_named themes

script: !include scripts.yaml
python_script:
scene: !include scenes.yaml
automation: !include automations.yaml

logger:
  default: info

input_number:
  living_room_humidity:
    name: Living Room Humidity
    min: 0
    max: 100
    step: 1
  living_room_temperature:
    name: Living Room Temperature
    min: -100
    max: 100
    step: 0.1
  living_room_light:
    name: Living Room Light
    min: 0
    max: 1000
    step: 1

  office_humidity:
    name: Office Humidity
    min: 0
    max: 100
    step: 1
  office_temperature:
    name: Office Temperature
    min: -100
    max: 100
    step: 0.1
  office_light:
    name: Office Light
    min: 0
    max: 1000
    step: 1

  en_suite_humidity:
    name: En Suite Humidity
    min: 0
    max: 100
    step: 1
  en_suite_temperature:
    name: En Suite Temperature
    min: -100
    max: 100
    step: 0.1
  en_suite_light:
    name: En Suite Light
    min: 0
    max: 1000
    step: 1

  bathroom_humidity:
    name: Bathroom Humidity
    min: 0
    max: 100
    step: 1
  bathroom_temperature:
    name: Bathroom Temperature
    min: -100
    max: 100
    step: 0.1
  bathroom_light:
    name: Bathroom Light
    min: 0
    max: 1000
    step: 1

sensor:
  - platform: serial
    serial_port: /dev/ttyACM1
    baudrate: 9600
    name: 'bax'

  - platform: template
    sensors:
      living_room_humidity_sensor:
        friendly_name: "Living Room Humidity"
        unit_of_measurement: "%"
        value_template: "{{ states('input_number.living_room_humidity') }}"
      living_room_temperature_sensor:
        friendly_name: "Living Room Temperature"
        unit_of_measurement: "°C"
        value_template: "{{ states('input_number.living_room_temperature') }}"
      living_room_light_sensor:
        friendly_name: "Living Room Light"
        unit_of_measurement: "lx"
        value_template: "{{ states('input_number.living_room_light') }}"

      office_humidity_sensor:
        friendly_name: "Office Humidity"
        unit_of_measurement: "%"
        value_template: "{{ states('input_number.office_humidity') }}"
      office_temperature_sensor:
        friendly_name: "Office Temperature"
        unit_of_measurement: "°C"
        value_template: "{{ states('input_number.office_temperature') }}"
      office_light_sensor:
        friendly_name: "Office Light"
        unit_of_measurement: "lx"
        value_template: "{{ states('input_number.office_light') }}"

      en_suite_humidity_sensor:
        friendly_name: "En Suite Humidity"
        unit_of_measurement: "%"
        value_template: "{{ states('input_number.en_suite_humidity') }}"
      en_suite_temperature_sensor:
        friendly_name: "En Suite Temperature"
        unit_of_measurement: "°C"
        value_template: "{{ states('input_number.en_suite_temperature') }}"
      en_suite_light_sensor:
        friendly_name: "En Suite Light"
        unit_of_measurement: "lx"
        value_template: "{{ states('input_number.en_suite_light') }}"

      bathroom_humidity_sensor:
        friendly_name: "Bathroom Humidity"
        unit_of_measurement: "%"
        value_template: "{{ states('input_number.bathroom_humidity') }}"
      bathroom_temperature_sensor:
        friendly_name: "Bathroom Temperature"
        unit_of_measurement: "°C"
        value_template: "{{ states('input_number.bathroom_temperature') }}"
      bathroom_light_sensor:
        friendly_name: "Bathroom Light"
        unit_of_measurement: "lx"
        value_template: "{{ states('input_number.bathroom_light') }}"

process_serial_data.py

# This file lives in:
# python_scripts/process_serial_data.py
#
# Field structure:
#
# 1.  Date  YYYY/MM/DD formatted ISO 8601 date of the packet
# 2.  Time  HH:MM:SS formatted time the packet was received at
# 3.  Name  The sensor's name, or its address if none has been assigned
# 4.  RSSI  Received Signal Strength Indication, in dBm
# 5.  Type  Received packet type. See Packet Types for full definition
# 6.  Seq No.   Packet identifier (sensors send packets incrementally)
# 7.  TX Power  Sensor-configured transmission power in dBm
# 8.  Battery   Battery level, in millivolts, of the BuildAX sensor
# 9.  Humidity  Relative Humidity (percentage of the saturation vapour pressure)
# 10. Temp  Temperature in degrees Celsius (°C), multiplied by 10.
# 11. Light     Luminous flux measurement in Lux
# 12. PIR Count     Activation counts of the Passive Infra-red sensor
# 13. PIR Energy    PIR energy last captured
# 14. Switch    Magnetic switch triggers on the device
#
# Example data:
# 2024/02/24,19:04:26,Office,-55,1,45,20,2722,39.90,185,0,0,19398,1
# 2024/02/24,19:04:36,Living Room,-50,1,240,20,2642,40.10,187,7,0,62181,1
# 2024/02/24,19:04:45,En Suite,-74,1,51,20,2631,55.51,151,0,0,8341,1
# 2024/02/24,19:04:53,Upst. Bathrm,-51,1,237,20,2688,51.02,143,0,0,16589,1
# 2024/02/24,19:04:57,Office,-55,1,46,20,2722,39.90,185,0,0,19764,1
#
#logger.info("input is {}".format(data))
#hass.bus.fire("script_run", {"process_serial_data": data})

names_entities = {
    'Office': 'office',
    'Living Room': 'living_room',
    'Upst. Bathrm': 'bathroom',
    'En Suite': 'en_suite',
}

def process_serial_data(data):

    sensor_data = data.strip().split(',')

    if len(sensor_data) < 14:
        logger.info('Non-data packet received')
        return

    try:
        name = sensor_data[2]
        #fields = ['date', 'time', 'name', 'rssi', 'type', 'seq', 'tx', 'battery', 'humidity', 'temperature', 'light', 'pir_count', 'pir_energy', 'switch_count' ]
        #values = {x: y for x,y in zip(fields, sensor_data)}
        # NB: Home Assistant's Python environment does not have dict(). WTAF.
        
        values = {
            'humidity': float(sensor_data[8]),
            'temperature': float(sensor_data[9]) / 10,
            'light': int(sensor_data[10]),
        }

        # Update entity based on sensor name
        entity = names_entities[name]
        for v in values:
            update_entity(
                'input_number.{}_{}'.format(entity, v), values[v]
            )

    except KeyError as e:
        logger.info(e)
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