How to measure Integration of rain pulse counter into daily value

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Hi everyone!

My first home assistant post here! :slight_smile: I had the same issue, but I did some tests to check how the filter works. I think the problem is that you are counting pulses using the rising edge, and in the pulse_counter documentation it says clearly it has to be on falling edge:

internal_filter ( Optional , Time): If a pulse shorter than this time is detected, it’s discarded and no pulse is counted. Defaults to 13us . On the ESP32, this value can not be higher than 13us , for the ESP8266 you can use larger intervals too. If you enable this, set up the count_mode to increase on the falling edge, not leading edge. For S0 pulse meters that are used to meter power consumption 50-100 ms is a reasonable value.

So, I wrote a simple code to count values:

sensor:
  - platform: pulse_counter
    name: "rain_gauge"
    pin:
      number: D5
      mode: INPUT_PULLUP    
    update_interval: 1s
    count_mode:
      rising_edge: DISABLE
      falling_edge: INCREMENT
    internal_filter: 13us
    filters:
      - multiply: 0.0166666666666666666667

In this way, it’s shown the pulse count per second, every second. Then, using the function generator of my Picoscope, I generated a signal simulating some bouncings:

image
image906×286 24.7 KB

It’s counting 4, which is correct, since I have the filter to 13us and my shortest pulse is 17us long. Then I changed the filter time to 10ms, and now it’s counting 1 even if I send 2 pulses together. (Sorry, I uploaded more oscilloscope captures, but it’s telling me I can’t upload more than 1 image because I’m a new user… :man_facepalming:)

The limit where it counts 2 pulses is when I split the pulses about 12ms.

So, my final code is as follows:

sensor:
  - platform: pulse_counter
    name: "rain_gauge"
    pin:
      number: D5
      mode: INPUT_PULLUP    
    update_interval: 60s
    count_mode:
      rising_edge: DISABLE
      falling_edge: INCREMENT
    internal_filter: 10ms
    unit_of_measurement: "mm"
    icon: "mdi:water"
    filters:
      - multiply: 0.359254458

I guess it would be nice if there was some option to prevent sending data if it counts zero, I think it’s not much useful to fill the database with zeros.

Hope to help!

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