How do I add new MQTT channels to an existing esphome Thing?

Setup, Configuration and Use Items & Sitemaps
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Was this Thing automatically discovered or is it a Generic MQTT Thing?

If the former,

  1. Take note of the UID of the Thing
  2. Delete the Thing (keep the links and Items)
  3. Rescan for the MQTT Thing using which ever standard ESPHome follows (Home Assistant or Homie).
  4. Accept the Thing from the inbox and the Channels should be there.

If it’s a Generic MQTT Thing, there’s a + icon at the bottom. Click that to define the new Channels.

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