I have a dust sensor GP2Y1010AU0F-[http://www.sharpsma.com/webfm_send/1488] that I would like to use with my raspberry pi and I would like to see the data using Cayenne but this sensor is not listed in the supported hardware.
Yes, absolutely. Look into our “Bring your own Thing” MQTT API. Our documentation for it is very extensive and has examples with bringing sensors into Cayenne via MQTT. Certainly feel free to use myself and the rest of the community as resources if you have questions or get stuck along the way.