Modbus write register works in automation but only half works in script

Hey, first time writer here, I hope I picked the right category.

I’m loosing my marbles trying to setup a script to write a modbus register.
For context, I already extensively control our solar inverter and the hot water heater controller via modbus TCP. Almost everything works, even though it was a steep learning curve.

One thing doesn’t want to cooperate for the life of me:
The hot water heater controller has 4 relay outputs that can be set via modbus to Off, Manual On, or Auto. I want to switch between Off and Auto.

This works:

automation:
  - id: "automation_smartfox_aout_mode"
    alias: "smartfox aout mode"
    description: "Set Aout mode"
    trigger:
      - platform: state
        entity_id:
          - input_select.set_sf_aout_ctrl_mode
    condition: []
    variables:
      aout_mode_off: [0x0]
      aout_mode_manual: [0x1]
      aout_mode_auto: [0x2]
    action:
      - service: modbus.write_register
        data_template:
          hub: SmartfoxPro2
          slave: !secret smartfox_modbus_slave
          address: 42206
          value: >
            {% if is_state('input_select.set_sf_aout_ctrl_mode', "Off") %}
              {{aout_mode_off}}
            {% elif is_state('input_select.set_sf_aout_ctrl_mode', "Manual") %}
              {{aout_mode_manual}}
            {% elif is_state('input_select.set_sf_aout_ctrl_mode', "Auto") %}
              {{aout_mode_auto}}
            {% else %}
              {{aout_mode_auto}}
            {% endif %}
    mode: single

together with an Input select where I can switch between the 3 options.

This doesn’t work:

script:
  set_smartfox_aout_mode:
    alias: "Set Smartfox Aout Mode"
    description: Set the Aout mode of Smartfox
    variables:
      aout_mode_off: [0x0]
      aout_mode_manual: [0x1]
      aout_mode_auto: [0x2]
    fields:
      mode_in:
        selector:
          select:
            options:
              - "Off"
              - "Manual"
              - "Auto"
            multiple: false
        required: true
        description: The Mode to set the Aout to
        name: mode_in
    sequence:
      - service: modbus.write_register
        data:
          hub: SmartfoxPro2
          slave: !secret smartfox_modbus_slave
          address: 42206
          value: >
            {% if mode_in == "Off" %}
              {{aout_mode_off}}
            {% elif mode_in == "Manual" %}
              {{aout_mode_manual}}
            {% elif mode_in == "Auto" %}
              {{aout_mode_auto}}
            {% else %}
              {{aout_mode_auto}}
            {% endif %}
    mode: single
    icon: mdi:car-cruise-control

and I don’t get why!

I can switch between all 3 options with the automation. With the script, “Off” just switches to “Manual” - setting to “Auto” with the script works! “Manual” works too! But running the script selecting “Off” sets the output to Manual.

Any hlp appreciated… I might be overlooking something completely obvious but I’m so hopelessly lost right now… Thanks!

• morgantic

1 post - 1 participant

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