How to use hall flowmeter for detecting hose burst

Configuration
1

Hi there, I’m new to HA and this is my first request for a little help from you.

I would like to use my hall flowmeter for detecting a hose burst in my irrigation system. The flow meter works well and shows met the current liters per hour. What can I do best to test if the flow is below or above some levels for a period and then use it to shut off my water pump and send me a notification? For now I make use of some simple automations in my irrigation system.

Thanks in advance

Harryf

2

Hi Harry,

I used ESPHome with a NodeMCU to achieve what you are looking for. Here is the ESPHome config. Not sure it is the best or only way of doing things but it appears to work.

esphome:
  name: potager_watering
  platform: ESP8266
  board: nodemcuv2

wifi:
  ssid: "xxxxxxxxxxx"
  password: "xxxxxxxxxxxxxxxxxx"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Potager Watering"
    password: "xxxxxxxxxxxxxx"
  manual_ip:
    static_ip: xxxxxxxxxxxxxxxxx
    gateway: xxxxxxxxxxxxxxxxx
    subnet: 255.255.255.0

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:

web_server:

ota:

globals:
  - id: leak_boolean
    type: int
    restore_value: false
    initial_value: '0'

  - id: pulses_watering_start
    type: int
    restore_value: false
    initial_value: '0'

switch:
  - platform: gpio
    pin: D7
    id: relay
    name: "Potager Tap"
    restore_mode: ALWAYS_OFF
    inverted: true
    on_turn_on:
      # Initialse global with number of pulses when tap is turned on
      - globals.set:
          id: pulses_watering_start
          value: !lambda |-
            return id(total_pulses).state;
    on_turn_off:
      - wait_until:
          sensor.in_range:
            id: water_flow
            below: 1
      - sensor.template.publish:
          id: pulses_this_watering
          state: !lambda 'return id(total_pulses).state - id(pulses_watering_start) ;'
      - homeassistant.event:
          event: esphome.potager_watering
          data:
            name: Watering Finished

    
sensor:
#
# Flow Meter
#
  - platform: pulse_counter
    name: "Potager Tap Pulses Per Minute"
    pin: D5
    update_interval: 20s
    id: water_flow
    internal: false
    on_value:
      then:
      #
      # Above 800 pulses per minute
      #
        - if:
            condition:
              sensor.in_range:
                id: water_flow
                above: 800
            then:
              - if:
                  condition:
                    lambda: 'return id(leak_boolean) == 1;'
                  then:
      #
      # This is the 2nd time in a row that threshold has been exceeded so take action
      #
                    - switch.turn_off: relay
                    - homeassistant.event:
                        event: esphome.potager_watering
                        data:
                          name: Leak Detected
                    - globals.set:
                        id: leak_boolean
                        value: '0'
                  else:
                    - globals.set:
                        id: leak_boolean
                        value: '1'    
            else:
      #
      # Reset leak boolean
      #
              - globals.set:
                  id: leak_boolean
                  value: '0'            
    total:
      name: 'Potager Tap Total Pulses'  
      id: total_pulses
#
# Soil Moisture Sensor
#
  - platform: adc
    pin: A0
    name: Potager Soil Moisture Value
    id:  soil_moisture
    accuracy_decimals: 1
    update_interval: 60s
    icon: mdi:flower

#
# Number Of Pulses This Watering
#
  - platform: template
    name: Potager Tap Pulses This Watering
    id: pulses_this_watering`
3

Hi there Glyn,

Thanks for sharing your esphome config. I didn’t realize that testing on the esp board it self is also an option. I will studie your config and see if I can use it in my setup. Have you thought about testing the leak detection in HA?

Best regards Harry

4

I decided to test on the board in case there was a communications problem or if HA was down.

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