How to create a custom notification channel?

Dear HA users,

I’m new to HA, and I’d like to know if it’s possible to create a personal notification channel, via a POST request, so that it’s available in all sensor, scene and other automations? I’d like to be able to reuse this call in a simple way in order to be able to call a local TTS service to inform people in my home.

Thank you for your answers,
Best regards,
Jean

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I have the same question…
I tried adding this to the data field of the trigger in the automation rule and no success like this:

channel: Critical

Next I’m trying the blueprint @Blacky published.

My goal is to have a critical notification channel on my Android for specific notifications that cannot be missed during phone DND time with a max volume and most annoying sound.

On your Android TV or your Android cell phone?

Just put it in an action, it will be automatically created after send the notification.

action: notify.mobile_app_<your_mobile_device_id>
data:
  message: "Hey Brother!"
  data:
    # For Android only
    channel: "Critical"   
    
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