Help with rainfall calculations

ESPHome
1

Hi,

I’m after help with rainfall calculations, I cant seem to get this right. I’m trying to calculate the rainfall

  • per hour
  • per minute
  • per day
  • per 24 hours

Heres what I have, and i’m pretty sure its wrong.

Any ideas?

Thanks

####Rainfall Start####
  - platform: pulse_counter
    pin:
      # Don't forget to add a pulling resistor, see README
      number: GPIO32
      mode: INPUT
    unit_of_measurement: 'mm'
    name: "${friendly_name} rain gauge"
    icon: 'mdi:weather-rainy'
    id: rain_gauge
    internal: true
    count_mode:
      rising_edge: DISABLE
      falling_edge: INCREMENT
    internal_filter: 13us
    update_interval: 10s
    filters:
      # Each 0.011" (0.2794mm) of rain causes one momentary contact closure
      - multiply: 0.2
    accuracy_decimals: 4

  - platform: integration
    name: "${friendly_name} rainfall per min"
    id: rain_per_min
    time_unit: min
    unit_of_measurement: 'mm'
    icon: 'mdi:weather-rainy'
    sensor: rain_gauge

  - platform: integration
    name: "${friendly_name} rainfall per hour"
    id: rain_per_hour
    time_unit: h
    unit_of_measurement: 'mm'
    icon: 'mdi:weather-rainy'
    sensor: rain_gauge

  - platform: integration
    name: "${friendly_name} rainfall per day"
    id: rain_per_daily
    time_unit: d
    unit_of_measurement: 'mm'
    icon: 'mdi:weather-rainy'
    sensor: rain_gauge

  - platform: total_daily_energy
    name: "${friendly_name} 24 Hour Rain"
    power_id: rain_gauge
    unit_of_measurement: 'mm'
    icon: 'mdi:weather-rainy'
    filters:
      - multiply: 60
      # x60 To convert to aggregated rain amount
2

Not sure if this will help or not but a lot of rainfall calculations like that have been done here and may give you a lead or 2.

1 Like
3

Also doesn’t an integration sensor require a source sensor that is unit per time interval?

Your input sensor is a total…

4

You’re wanting all these rainfall sensors to be on the esp board? Do you not plan to send them to HA?

5

when using the integration component you need to reset it yourself otherwise it continus counting forever (or until a restart if you don’t restore values). :stopwatch:

The sensor.integration.reset action is what you need - probably together with a script so you can time your hourly / daily / etc. resets :bulb:

6

Thanks, these examples are great.

I’m having some issues integrating this code with my current pulse_counter sensor.

template:
  - sensor:
      - name: Rainfall today
        unit_of_measurement: mm
        state_class: total_increasing
        unique_id: rainfall_today
        state: >-
          {% set count = states('sensor.rainsensor_flips') | int(0) %}
          {% set mm = count * 0.30303 %}
          {% if count >= 0 %}
            {{ mm|round(1, 'floor') }}
          {% endif %}
        # If you have issues with the history sensor doubling after restarting HA, add the line below (@BigG)
        availability: "{{ (states('sensor.rainsensor_flips') not in ('unknown', 'unavailable')) }}"

How can I adapt this to be compatible with my Pulse Counter?

Also, I dont want to do any calculations in this template sensor, as the calculations are all done on the pulse_counter.

I’ve not really used template sensors before.

Thanks