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Monitoring water consumption with an ESP8266 and a €15 flow meter


With less than €20, you can monitor your real-time water consumption in HomeAssistant!

You will need an ESP8266 and a flow meter to measure the water.
Connections:
The flow meter has 3 wires, usually red, black, and yellow.
Red and black wires are for power supply (red for + and black for -), which you connect to the ESP8266 with Vin=+ and Gnd=negative pins.
The yellow wire provides pulses and should be connected to GPIO15 (D8) pin on the ESP8266.
And now, here's the code for ESPHOME in HomeAssistant."
esphome:
  name: waterflow-appt
  platform: ESP8266
  board: esp01_1m
 
wifi:
  ssid: "votreboxe"
  password: "votre PWD"
  fast_connect: on
 
# Enable logging
logger:
 
# Enable Home Assistant API
api:
 
ota:
 
time:
  - platform: sntp
    id: my_time
 
 
sensor:
 
 
  - platform: pulse_counter
    id: water_flow_meter1
    pin: GPIO15
    name: "water_flow_meter1"    
    update_interval: 1s
    icon: mdi:water
    filters:
     - lambda: return  (x / 9.63);
    unit_of_measurement: "l"
 
  - platform: total_daily_energy
    name: "daily_water1"
    power_id: water_flow_meter1
    unit_of_measurement: "l"
    accuracy_decimals: 2
    id: daily_water1  
 
  - platform: wifi_signal
    name: "WiFi puissance_water"
    update_interval: 10s
 
switch:
  - platform: restart
    name: "restart_water_flow"

It may be necessary to adjust the coefficient of -lambda:return (x / 9.63) because it depends on the pulses sent by the flow meter. As for me, I found this coefficient by measuring with a 5L bucket and adjusting the coefficient using a rule of three. Now, all that's left is for you to give it a try!



Posted 1 year ago

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