If your ESPHome device has been added to Home Assistant, you can interface your configuration with Home Assistant entities in a number of ways.
Your device must have been added to Home Assistant before you can access Home Assistant entities. Even if you are using ESPHome inside of Home Assistant, you still need to explicitly add your ESPHome device to Home Assistant. Typically, when you create a new ESPHome device, the first time you upload your firmware to it and run it, Home Assistant pops up an automatic notification about “newly discovered devices”. Click the notification and follow the instructions to add the device.
Overview
Here are a few use cases illustrating the potential of interfacing ESPHome configurations with Home Assistant:
- Publishing Information: your microcontroller may be battery-driven, and you’d like to publish the current battery state to Home Assistant so in the Home Assistant dashboard, you can immediately see when the battery runs low.
- Publishing Controls: you may want to use buttons on your device to control other devices managed by Home Assistant. For example, you may want to create a set of buttons that can switch on and off some lights in your house.
- Receiving Device State: you want Home Assistant to inform your device when a given entity state changes. For example, you want your device to show icons based on which lamps in your house are currently turned on or off.
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(content created Oct 15, 2024)