Gas meter in Home Assistant without a soldering iron

Not so long ago, I received a gas bill from which I felt uncomfortable, and I decided to integrate a regular gas meter into my smart home based on the Raspberry Pi + Home Assistant in order to predict the cost of expenses and receive alerts as soon as the consumption exceeds expectations.

First of all, I climbed onto Habr, and to my surprise, among not a small number of articles on how to read meter readings, and even a couple of articles directly on taking readings from a gas meter, in none of them I did not find what I was looking for.

There is a rather interesting article from 2014 about optical reading from any meter using a smartphone , but there is not a word about Home Assistant at all, nor about its component for optical recognition of meters in particular.

There is an article from 2018 about a universal inexpensive device for optical reading from any meter , which I would be happy to buy at that time, but it still has not got into the free sale.

Reading these and other articles (for example, the 2018 article about Waterius , or the 2020 article Smart Khrushchev at maximum speed ), I realized that the counters are not divided into two generations (offline and online), but into three. In addition to the 3rd generation of meters, which is able to send meter readings where necessary, there is also a 2nd generation that does not know how to transmit data over the network itself, but is equipped with a pulse transmitter (optical or magnetic) that allows you to connect a module to the meter that reads these pulses and passes on.

Googling my gas meter (it turned out to be BK-G4), I happily discovered not only that a magnetic pulse generator is built into it (a magnet on the low-order drum), but even that there are already successful examples of its integration into Home Assistant .

() IN-Z61 (1640 , ), esp8266 (788 ), , , , , , , .

, , Home Assistant Xiaomi ( MCCGQ01LM), - 600 .

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Home Assistant configuration.yaml

counter:
  gas_counter:
    step: 10
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

automations.yaml

- id: '1606010744418'
  alias: Gas count
  description: ''
  trigger:
  - entity_id: binary_sensor.openclose_gas
    platform: state
    from: 'on'
    to: 'off'
  action:
  - data:
      entity_id:
      - counter.gas_counter
    service: counter.increment
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

configuration.yaml utility_meter: !include utility_meter.yaml



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gas_monthly:
  source: sensor.gas_counter_sensor
  cycle: monthly
  tariffs:
    - single
gas_daily:
  source: sensor.gas_counter_sensor
  cycle: daily
  tariffs:
    - single
gas_hourly:
  source: sensor.gas_counter_sensor
  cycle: hourly
  tariffs:
    - single
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

,

- platform: template
  sensors:
    gas_counter_sensor:
      friendly_name: "  "
      unit_of_measurement: '3'
      value_template: "{{ (states('counter.gas_counter') | float) / 1000 }}"
      icon_template: mdi:counter
- platform: template
  sensors:
    gas_last_month:
      friendly_name: "  ( )"
      unit_of_measurement: '₽'
      value_template: "{{ ((state_attr('sensor.gas_monthly_single', 'last_period') | float) / 1000 * 6056.4) | round(2) }}"
      icon_template: mdi:cash-100
- platform: template
  sensors:
    gas_this_month:
      friendly_name: "  ( )"
      unit_of_measurement: '₽'
      value_template: "{{ ((states('sensor.gas_monthly_single') | float) / 1000 * 6056.4) | round(2) }}"
      icon_template: mdi:cash-100
- platform: template
  sensors:
    gas_today:
      friendly_name: "  ()"
      unit_of_measurement: '₽'
      value_template: "{{ ((states('sensor.gas_daily_single') | float) / 1000 * 6056.4) | round(2) }}"
      icon_template: mdi:cash-100
- platform: template
  sensors:
    gas_yesterday:
      friendly_name: "  ()"
      unit_of_measurement: '₽'
      value_template: "{{ ((state_attr('sensor.gas_daily_single', 'last_period') | float) / 1000 * 6056.4) | round(2) }}"
      icon_template: mdi:cash-100
- platform: template
  sensors:
    gas_this_hour:
      friendly_name: "  ( )"
      unit_of_measurement: '₽'
      value_template: "{{ ((states('sensor.gas_hourly_single') | float) / 1000 * 6056.4) | round(2) }}"
      icon_template: mdi:cash-100
- platform: template
  sensors:
    gas_last_hour:
      friendly_name: "  ( )"
      unit_of_measurement: '₽'
      value_template: "{{ ((state_attr('sensor.gas_hourly_single', 'last_period') | float) / 1000 * 6056.4) | round(2) }}"
      icon_template: mdi:cash-100
- platform: template
  sensors:
    gas_hour_based_monthly_estimate:
      friendly_name: "  (->)"
      unit_of_measurement: '₽'
      value_template: "{{ ((state_attr('sensor.gas_hourly_single', 'last_period') | float) / 1000 * 6056.4 * 24 * 30) | int }}"
      icon_template: mdi:chart-line-variant
- platform: template
  sensors:
    gas_day_based_monthly_estimate:
      friendly_name: "  (->)"
      unit_of_measurement: '₽'
      value_template: "{{ ((state_attr('sensor.gas_daily_single', 'last_period') | float) / 1000 * 6056.4 * 30) | int }}"
      icon_template: mdi:chart-line-variant
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

SD Home Assistant , Home Assistant , , configuration.yaml

recorder:
  exclude:
    entities:
      - binary_sensor.openclose_gas
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

Home Assistant

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