Yep, so as @Ian mentioned, there are many possibilities with Cayenne’s new Arduino integration. we will be working on ability for you to bring a sensor (for the Pi) that is not currently supported into the Cayenne dashboard. Unfortunately, we do not have resources to do ‘one-off’ integrations for every sensor requested. Unless of course there is MANY community members who request it (like DHT11 post). Of course, when one community member is able to integrate a specific sensor to Cayenne, then we will create process to make that available to community as a whole. This is what we have begun working on 
I hope this explanation helps! (Adding @ats1080s for context)
-B