How to change switch Icons/ state icon

SaschaN71 · May 23, 2025, 5:59pm

Hi, I need to import sensor data from a remote sensor via mqtt and toggle a relay. The Setup already works, only thing is, I can not change how the switch looks, I want to look it like autodiscovered switches with the slider, but instead it has 2 icons to click on, see in screenshot.

I already tried a lot in the (so named) mqtt.yaml. the current setup is:

- switch:
  - name: "Testschalter2"
    unique_id: "schalter002"
    state_topic: "test/switch1/set"
    command_topic: "test/switch1/set"
    payload_on: "ON"
    payload_off: "OFF"
    state_on: "ON"
    state_off: "OFF"
    optimistic: true

I found a lot articles where an option “assumed_state: false” would do that but
this option is not valid for an mqtt switch

Sir_Goodenough · May 23, 2025, 7:36pm

Hello SaschaN71,

Does this help you at all?
I have a template sensor that watched my most complicated one.

github.com/SirGoodenough/Home-Assistant-Config

templates/sensor/lock_s-tmpl.yaml

283511cb4

- sensor:
    - name: "Lock Back Door Mode"
      unique_id: a54df078-9846-4dbd-aac5-7a733a3db22a
      attributes:
        friendly_name: "Lock Back Door Mode"
      icon: >-
        {% set alarmtype = "sensor.smart_code_with_home_connect_technology_alarmtype" %}
        {% if is_state( alarmtype, "0") %}
          mdi:help
        {% elif is_state( alarmtype, "9") %}
          mdi:lock-alert
        {% elif is_state( alarmtype, "22") %}
          mdi:lock-open-outline
        {% elif is_state( alarmtype, "21") %}
          mdi:lock-outline
        {% elif is_state( alarmtype, "22") %}
          mdi:lock-open-outline
        {% elif is_state( alarmtype, "26") %}
          mdi:lock
        {% elif is_state( alarmtype, "27") %}

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SaschaN71 · May 24, 2025, 2:16pm

Yes! Thanks for pointing me into the right direction. The problem was if the state_topic could not be read, the switch works but shows those 2 icons only.