How do you tell all the sensor states of a device. Example I am using a blueprint that you have to type the state in of the entity but I don't know all of the specific states. This case its a badring water sensor used via z2m. I tried creating an automation and selecting the entity and the attribute drop down is blank. I can see in z2m it only shows current state. I can see device specific states but not from an entity perspective which is what the blueprint is geared towards. It will allow me to send critical alerts to particular devices.
#See All Entity States of a Device
grave hollow
bold marsh
There's no single answer to this, it's really up to the integration.
There is a special device class enum which can be used if an integration wants to publish a text sensor that has a list of known states, and that can hint the UI for the available options.
But absent that an integration can set the state to anything (for a sensor anyway), there's no way to know upfront.