Pixhawk and xbee

Hello everyone,

I am working on a project to track wifi signal strengths using a quadcopter having a Pixhawk flight controller. If am able to use xbee is there a way how to connect them? Also, how would I program/change Pixhawk to receive such data and navigate to find signals? I thought about using an arduino, but again, how to connect it and how to send data to pixhawk.

Thanks for any advice/guidance provided on this project.