Is it possible to connect raspberry pi 3 b+ to kakute f7 aio as companion computer (via MAVLink) instead of pixhawk. As far as i can see connection is setup via telemetry 2 and kakute f7 aio has telemetry 2 mapped to uart 2.
Denis, I believe that is very possible. I have plans to do it myself. I have not researched it much yet, but when you see that there is a carrier board in the making to make it easy to mount the two together, it obviously is possible! Using MAVLink, it should not matter what the flight controller is as long as it supports MAVLink. This link may be helpful: Kakute F4 carrier board for Raspberry Pi
Kenny