ESPHome sample configuration for an HX711 powered Smart Scale including Auto-Tare functionality.

esphome_hx711_smart_scale.yaml

Moved to https://github.com/markusressel/ESPHome-Smart-Scale

Please use the repository for questions and issues.
https://github.com/markusressel/ESPHome-Smart-Scale

I'm wondering if anyone can help.

I have used this with an ESP8266 board in an outside hedgehog box. It weighs the hogs as they are feeding. Everything works, however the zero reading drifts massively being outside. I have tried a previous auto tare which keeps the reading at 0g throughout the day, but the weight is quite a distance out once the temperatures drop on the night.

Can anyone include some code so that I can use a spare GPIO pin on the board so as the hog enters the box, the scales zero themselves before it reaches the main compartment ?

Current code is:

globals:

• id: constant_weight
  type: float

`captive_portal:

sensor:

• platform: hx711
  id: weight
  name: "HX711 Value2"
  dout_pin: GPIO14
  clk_pin: GPIO12
  gain: 128
  update_interval: 5s
  unit_of_measurement: g
  filters:
  calibrate_linear:
  - 68604 -> 0
  - 626959 -> 2030
  on_value:
  - if:
  condition:
  - lambda: |-
  static float last = 0.0;
  float diff = x - last;
  last = x;
  return x < 50.0 && diff < 1.0 && diff > - 1.0;
  then:
  - lambda: 'id(constant_weight) = x;'

• platform: template
  name: Hog Weight2
  icon: mdi:scalee
  unit_of_measurement: g
  accuracy_decimals: 0
  lambda: 'return id(weight).state;'
  filters:
  - lambda: 'return x - id(constant_weight);'
  - lambda: 'return x >= 10.0 ? x : 0;'
  - delta: 0.5`