link to original file: https://github.com/vigonotion/smarthome/blob/master/esphome/water_bottles.yaml

water_bottles.yaml

esphome:
  name: water_bottles
  platform: ESP8266
  board: d1_mini

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

api:
ota:
logger:

sensor:
  - platform: hx711
    name: "water_bottles_weight"
    id: water_bottles_weight
    dout_pin: D2
    clk_pin: D1
    gain: 128
    update_interval: 60s
    filters:
      - lambda: |-
          auto first_mass = 0.0; // first known mass was 0kg
          auto first_value = 25136; // value for the first known mass was 
          auto second_mass = 12840; // second mass was 
          auto second_value = 24568; // second value was

          auto r = map(x/1000, first_value, second_value, first_mass, second_mass);
          if (r > 0) return r;
          return 0;
    unit_of_measurement: g

  - platform: template
    name: "water_bottles_count"
    lambda: |-
      return floor(id(water_bottles_weight).state / 1000);
    update_interval: 60s