Do you have any devices connected to Alexa that aren't also integrated into Hubitat? As mentioned above, button devices send commands like button presses but don't really receive them, and to my knowledge, the Alexa framework right now doesn't even have a way to cope with momentary events like button pushes (it certainly could if Amazon added this: right now it can respond to event changes like a motion sensor becoming active and can do things like turn a switch on or off). There is no way to integrate them, and they wouldn't do anything with Alexa as-is if you could.
If the answer to this question is "no," then I'd recommend the above advice: create automations for the button in Hubitat. It's more powerful than Alexa and not dependent on the cloud (if none of your devices are). If it's "yes," you have two options:
- Figure out how to get those devices into Hubitat (some may have an official integration; some might be able to be worked around with IFTTT; and you could even create virtual devices in Hubitat like a virtual switch, expose it to Alexa, and have an Alexa Routine turn it on/off or whatever based on the Alexa-only device you have)
- Alternatively, expose the button to Alexa with an awkward workaround--for example, as a virtual motion or contact sensor (create a virtual motion or contact sensor in Hubitat and create a rule that sets that virtual device to active or open when the button is pressed and inactive/closed shortly after). You could then use this virtual device to trigger an Alexa Routine. Motion and contact sensors are, to my knowledge, the only thing you can use in Alexa to do so (this would be a bit easier but still not super-easy with a virtual switch)
Both of the above might be a little difficult if you are new to Hubitat, and the best option by far is to get devices that are natively supported. But with many types of devices, you can often make things work using other tools--like virtual devices for capabilities that can be integrated. Sometimes, it just might be awkward (or impossible or at least highly difficult; I couldn't imagine trying to get color control into Hubitat from an Alexa-only bulb despite awkward workarounds I could think of like a virtual dimmer corresponding to different hues).
