fresh-home/esphome/common/hx711_double.yaml

globals:
  - id: left_initial_zero
    type: float
    restore_value: yes
    # NOTE: make sure to align this value to the one used in "calibrate_linear" below!
    initial_value: ${left_loadcell_zero}

  - id: right_initial_zero
    type: float
    restore_value: yes
    # NOTE: make sure to align this value to the one used in "calibrate_linear" below!
    initial_value: ${right_loadcell_zero}

  - id: left_auto_tare_difference
    type: float
    restore_value: yes
    initial_value: '0'

  - id: right_auto_tare_difference
    type: float
    restore_value: yes
    initial_value: '0'

  - id: left_manual_tare_flag
    type: bool
    restore_value: no
    initial_value: 'false'

  - id: right_manual_tare_flag
    type: bool
    restore_value: no
    initial_value: 'false'

  - id: auto_tare_enabled
    type: bool
    restore_value: yes
    initial_value: 'true'

  - id: occupancy_forced
    type: bool
    restore_value: yes
    initial_value: 'false'

sensor:
  - platform: homeassistant
    entity_id: input_number.${entity_name}_left_occupied
    internal: true
    id: left_occupied

  - platform: homeassistant
    entity_id: input_number.${entity_name}_right_occupied
    internal: true
    id: right_occupied

  - platform: template
    name: "${friendly_name} Left Raw Value"
    lambda: |-
      return id(hx711_left_value_raw).raw_state;
    unit_of_measurement: w
    update_interval: 1s
    state_class: measurement
    disabled_by_default: true

  - platform: template
    name: "${friendly_name} Right Raw Value"
    lambda: |-
      return id(hx711_right_value_raw).raw_state;
    unit_of_measurement: w
    update_interval: 1s
    state_class: measurement
    disabled_by_default: true

  - platform: template
    name: "${friendly_name} Left Auto Tare"
    lambda: |-
      return id(left_auto_tare_difference);
    unit_of_measurement: w
    update_interval: 1s
    state_class: measurement
    disabled_by_default: true

  - platform: template
    name: "${friendly_name} Right Auto Tare"
    lambda: |-
      return id(right_auto_tare_difference);
    unit_of_measurement: w
    update_interval: 1s
    state_class: measurement
    disabled_by_default: true

  - platform: template
    name: "${friendly_name} Left Initial Zero"
    lambda: |-
      return id(left_initial_zero);
    unit_of_measurement: w
    state_class: measurement
    update_interval: 60s
    disabled_by_default: true

  - platform: template
    name: "${friendly_name} Right Initial Zero"
    lambda: |-
      return id(right_initial_zero);
    unit_of_measurement: w
    state_class: measurement
    update_interval: 60s
    disabled_by_default: true

  # Left RAW Scale input
  - platform: hx711
    id: hx711_left_value_raw
    internal: True
    dout_pin: ${left_dout_pin}
    clk_pin: ${left_clk_pin}
    gain: 128
    accuracy_decimals: 3
    update_interval: 0.2s
    filters:
      - lambda: !lambda |-
          if (x > 8388000.0) return {};
          if (x < -8388000.0) return {};
          return x;
      - sliding_window_moving_average:
          window_size: 3
          send_every: 1
    on_value:
      then:
        - sensor.template.publish:
            id: hx711_left_value
            state: !lambda 'return id(hx711_left_value_raw).state;'
        - if:
            condition:
              and:
                - lambda: 'return id(auto_tare_enabled);'
              # current smart scale value is below approx. 10KG (raw value -375000 aka nobody is standing on the scale
                - lambda: 'return id(hx711_left_value).state < 10.0;'
            then:
              - if:
                  condition:
                    # current raw scale value is below expected zero value
                    - lambda: 'return id(hx711_left_value_raw).state < (id(left_initial_zero) - id(left_auto_tare_difference));'
                  then:
                    # INcrease Auto-Tare offset to slowly align real zero value with expected zero value
                    - lambda: |-
                        id(left_auto_tare_difference) += 10;
                  else:
                    # DEcrease Auto-Tare offset to slowly align real zero value with expected zero value
                    - lambda: |-
                        id(left_auto_tare_difference) -= 10;

  # Right RAW Scale input
  - platform: hx711
    id: hx711_right_value_raw
    internal: True
    dout_pin: ${right_dout_pin}
    clk_pin: ${right_clk_pin}
    gain: 128
    accuracy_decimals: 3
    update_interval: 0.2s
    filters:
      - lambda: !lambda |-
          if (x > 8388000.0) return {};
          if (x < -8388000.0) return {};
          return x;
      - sliding_window_moving_average:
          window_size: 3
          send_every: 1
    on_value:
      then:
        - sensor.template.publish:
            id: hx711_right_value
            state: !lambda 'return id(hx711_right_value_raw).state;'
        - if:
            condition:
              and:
                - lambda: 'return id(auto_tare_enabled);'
              # current smart scale value is below approx. 10KG (raw value -375000 aka nobody is standing on the scale
                - lambda: 'return id(hx711_right_value).state < 10.0;'
            then:
              - if:
                  condition:
                    # current raw scale value is below expected zero value
                    - lambda: 'return id(hx711_right_value_raw).state < (id(right_initial_zero) - id(right_auto_tare_difference));'
                  then:
                    # INcrease Auto-Tare offset to slowly align real zero value with expected zero value
                    - lambda: |-
                        id(right_auto_tare_difference) += 10;
                  else:
                    # DEcrease Auto-Tare offset to slowly align real zero value with expected zero value
                    - lambda: |-
                        id(right_auto_tare_difference) -= 10;

  # Left Mapped value to lbs
  - platform: template
    id: hx711_left_value
    name: "${friendly_name} Left Weight"
    internal: False
    filters:
      # apply auto_tare difference
      - lambda: 'return x + id(left_auto_tare_difference);'
      # apply rough calibration
      - calibrate_linear:
          # retrieve these values by evaluating the raw values with loads of known mass.
          # note that a bigger difference between measurements usually results in higher resolution,
          # so measure 0 Kg and the highest known mass you have (like f.ex. your own weight, measured by a normal scale with good accuracy)
          # 1221300 difference between the two
          # was at -23800 for the longest time
          - ${left_loadcell_zero} -> 0
          - ${left_loadcell_load} -> ${left_loadcell_weight}
      # map values below 0.1 to 0 (to decrease value changes due to random fluctuation)
      - lambda: |-
          if (x <= 0.1 || id(hx711_left_error).state) {
            return 0.0;
          } else {
            return x;
          }
    unit_of_measurement: lbs
    accuracy_decimals: 0
    update_interval: 0.5s
    state_class: measurement

  # Right Mapped value to lbs
  - platform: template
    id: hx711_right_value
    name: "${friendly_name} Right Weight"
    internal: False
    filters:
      # apply auto_tare difference
      - lambda: 'return x + id(right_auto_tare_difference);'
      # apply rough calibration
      - calibrate_linear:
          # retrieve these values by evaluating the raw values with loads of known mass.
          # note that a bigger difference between measurements usually results in higher resolution,
          # so measure 0 Kg and the highest known mass you have (like f.ex. your own weight, measured by a normal scale with good accuracy)
          # 1221300 difference between the two
          # was at -23800 for the longest time
          - ${right_loadcell_zero} -> 0
          - ${right_loadcell_load} -> ${right_loadcell_weight}
      # map values below 0.1 to 0 (to decrease value changes due to random fluctuation)
      - lambda: |-
          if (x <= 0.1 || id(hx711_right_error).state) {
            return 0.0;
          } else {
            return x;
          }
    unit_of_measurement: lbs
    accuracy_decimals: 0
    update_interval: 0.5s
    state_class: measurement

  - platform: template
    name: "${friendly_name} Combined"
    id: combined_weight
    update_interval: 1s
    unit_of_measurement: lbs
    state_class: measurement
    lambda: |-
      return id(hx711_left_value).state + id(hx711_right_value).state;

binary_sensor:
  - platform: template
    name: "${friendly_name} Left Occupied"
    id: is_left_occupied
    lambda: |-
      if (
          id(hx711_left_value).state >= id(left_occupied).state
          ) {
        return true;
      } else {
        return false;
      }

  - platform: template
    name: "${friendly_name} Right Occupied"
    id: is_right_occupied
    lambda: |-
      if (
          id(hx711_right_value).state >= id(right_occupied).state
          ) {
        return true;
      } else {
        return false;
      }

  - platform: template
    name: "${friendly_name} Occupied"
    lambda: |-
      if ( id(is_left_occupied).state || id(is_right_occupied).state )
      {
        return true;
      } else {
        return false;
      }

  - platform: template
    name: "${friendly_name} Left HX711 Error"
    id: hx711_left_error
    device_class: problem
    lambda: |-
      if (
          id(hx711_left_value_raw).raw_state > 8388000.0 || id(hx711_left_value_raw).raw_state < -8388000.0
          ) {
        return true;
      } else {
        return false;
      }

  - platform: template
    name: "${friendly_name} Right HX711 Error"
    id: hx711_right_error
    device_class: problem
    lambda: |-
      if (
          id(hx711_right_value_raw).raw_state > 8388000.0 || id(hx711_right_value_raw).raw_state < -8388000.0
          ) {
        return true;
      } else {
        return false;
      }

  - platform: template
    name: "${friendly_name} HX711 Error"
    id: hx711_error
    device_class: problem
    lambda: |-
      if (
          id(hx711_left_error).state || id(hx711_right_error).state
          ) {
        return true;
      } else {
        return false;
      }

switch:
  - platform: template
    id: auto_tare
    name: "${friendly_name} Auto Tare"
    lambda: |-
      return id(auto_tare_enabled);
    turn_on_action:
      - lambda: |-
          id(auto_tare_enabled) = true;
    turn_off_action:
      - lambda: |-
          id(auto_tare_enabled) = false;

  - platform: template
    id: left_manual_tare
    name: "${friendly_name} Left Manual Tare"
    lambda: |-
      return id(left_manual_tare_flag);
    turn_on_action:
      - lambda: |-
          id(left_auto_tare_difference) = id(left_initial_zero) - id(hx711_left_value_raw).state;
      - switch.turn_off: left_manual_tare
    turn_off_action:
      - lambda: |-
          id(left_manual_tare_flag) = false;

  - platform: template
    id: right_manual_tare
    name: "${friendly_name} Right Manual Tare"
    lambda: |-
      return id(right_manual_tare_flag);
    turn_on_action:
      - lambda: |-
          id(right_auto_tare_difference) = id(right_initial_zero) - id(hx711_right_value_raw).state;
      - switch.turn_off: right_manual_tare
    turn_off_action:
      - lambda: |-
          id(right_manual_tare_flag) = false;