How to get ESP32 reed water sensor to provide values?

ESPHome
,
1

Hi there,
I have a similar problem like in this older post

I have bought an ESP32 reed sensor measure water consumption. I never really got it work properly, Despite setting different initial values in the developer tool, it still would start with the value I used for testing first (ca. 3.590m3 instead of currently 1.170m3).

Here is the configuration yaml. Could you kindly help me with that? And yes, I am not really a pro in HomeAssistant…

esphome:
  name: meter-3644                      # unique identifier

esp32:                                  # MAC: 88:56:A6:5C:36:44
  board: esp32-c3-devkitm-1
  framework:
    type: arduino

preferences:
  flash_write_interval: 6h              # save every 6 hours

ota:
  - platform: esphome
    password: "uLo8teip"

wifi:
  output_power: 10db
  ssid: "dummy"                     # Wi-Fi SSID
  password: "dummy"               # Wi-Fi password
  ap:
    password: "EeYaigh4"                # fallback access point password

captive_portal:

api:
  encryption:
    key: O+wPZAwIexKiT9nxVXSsEqfbXA0M9m4NRXUU6bOU+is= # https://esphome.io/components/api.html

globals:
  - id: pulses
    type: int
    restore_value: yes                  # restore value after reboot (yes)
    initial_value: 1150.170                  # inital value (0,0 m³)

binary_sensor:
  - platform: gpio
    id: pulse
    internal: true
    pin:
      number: GPIO0
      mode:
        input: true
        pullup: true
    name: Pulse
    filters:
      - delayed_on: 10ms
    on_press:
      then:
        - lambda: id(pulses) += 1;

sensor:
  - platform: template
    name: Water
    device_class: water
    unit_of_measurement: m³
    state_class: total_increasing
    icon: mdi:water
    accuracy_decimals: 3
    lambda: return id(pulses) * 0.01;   # meter multiplier (0,01 m³)
    update_interval: 60s
  - platform: homeassistant
    name: Offset-water
    entity_id: sensor.meter_3644_offset
    id: offset
    on_value:
      then:
        - globals.set:
            id: pulses
            value: !lambda 'return int(x);'

web_server:
    port: 80
    local: true

logger:
2

Unlikely to be correct. GPIO0 is typically wired to the boot switch on an ESP32.

3

Can you tell from the pics?

IMG_1452
IMG_14521920×2560 250 KB

4

IMG_1453
IMG_14531920×2560 253 KB

5

Ah C3. Nevermind, it’s correct then.

6

But what is the actual issue? Just that the initial value is kept from your initial tests? In this case, you would need a factory reset to wipe the saved values:

Or is the pulse counter not working?

7

The pulse counter did work from the beginning or at least I did not have the right decimal value set.

As first step, factory reset sounds like a good idea. Would it be OK to do it via the physical button method?

8

The reset is always done through the physical button when using the integration, if I get it right :wink:
Just adding the integration won’t perform the reset.

I never used the functionality myself. What I did as some point is to just set restore_values to false, flash, and set it back to true.

9

Or if you want to play with it or regularly want to adjust the value, add a template number on your setup…

number:
  - platform: template
    name: "Set Value"
    optimistic: true
    set_action:
      - lambda: |-
          id(pulses) = x;
10

In the latest changes, 2026.1: Home is where the dashboard is 🥂 - Home Assistant the new Action Responses capability may solve some of your problems.