Shelly has integrated MQTT support, check the links I provided you in previous post. So Shelly devices update MQTT topics.
You can then install MQTT Link and subscribe to Shelly topics via a virtual device: [RELEASE] Hubitat MQTT Link
MQTT Link is also available through Hubitat Package Manager app.
Obviously you need an MQTT broker, like Mosquitto, installed somewhere.
Or, you can use a free MQTT broker server on the internet, I use this one: Free Public MQTT 5 Broker Server | EMQ (emqx.io)
