Gas Meter -REED - ESPHome -Wemos D1

Compact Gas Meter Sensor based on a G123-08 Reed Sensor Module, a Wemos D1 Mini, and the 3D-printed enclosure

For wiring, three 3–5 cm cables are needed

Wiring:

For the G123-08 Reed sensor module, the pins must be desoldered to fit it into the enclosure

• VCC → 3.3 V
• GND → G
• D0 → D5 (or GPIO14)

The included ESPHome code can be directly inserted into the ESPHome Device Builder after adjusting the Wi-Fi name and password

Optionally, a static IP can be assigned

The consumption value per pulse (standard: 0.01 m³) can be adjusted in the last line of the code

esphome:

  name: gas_meter

  friendly_name: Gas Meter

 

esp8266:

  board: d1_mini

 

wifi:

  ssid: "WIFI-NAME"

  password: "PASSWORD"

  min_auth_mode: WPA2

# ---------------------------------------------------

#  manual_ip:

#    static_ip: 192.168.1.56

#    gateway: 192.168.1.1

#    subnet: 255.255.255.0

#   dns1: 192.168.1.11

 

logger:

 

api:

  services:

    - service: set_gas_counter

      variables:

        value: int

      then:

        - lambda: |-

            id(gas_impulse_counter) = value;

 

ota:

  platform: esphome

 

# ---------------------------------------------------

# Global variable for gas impulses (persistent counter)

# ---------------------------------------------------

globals:

  - id: gas_impulse_counter

    type: uint32_t

    restore_value: yes

    initial_value: '0'

 

# ---------------------------------------------------

# Reed contact on D5 (GPIO14)

# ---------------------------------------------------

binary_sensor:

  - platform: gpio

    pin:

      number: GPIO14

      mode: INPUT_PULLUP

      inverted: true

    id: gas_impuls

    name: "Gas Pulse"

    filters:

      - delayed_on: 20ms

      - delayed_off: 200ms

    on_press:

      then:

        - lambda: |-

            id(gas_impulse_counter) += 1;

 

# ---------------------------------------------------

# Gas consumption in m³ (0.01 m³ per pulse)

# ---------------------------------------------------

sensor:

  - platform: template

    id: gas_m3

    name: "Gas Consumption (m³)"

    unit_of_measurement: "m³"

    device_class: gas

    state_class: total_increasing

    accuracy_decimals: 3

    lambda: |-

      return id(gas_impulse_counter) * 0.01;

In Home Assistant, you can enter your current meter reading