Expand description
Interface for button requests and events. This interface is available on devices with the ei_device.capability button.
This interface is only provided once per device and where a client requests ei_button.release the interface does not get re-initialized. An EIS implementation may adjust the behavior of the device (including removing the device) if the interface is releasd.
Note that for a client to receive objects of this type, it must announce support for this interface in ei_handshake.interface_version.
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- The logical state of a button.