Ibu2 hook up

[Tankbear]

For fly sky radios with left stick throttle connections are

Rx1 to ibu2
Rx2 to ibu1
Rx3 to ibu3
Rx4 to ibu4

Don't normally have to calibrate the fs-i6 radio with IBU2 but always best to.

Also when you power on the IBU2 it plays a short bit of elevation sound to verify the microsd card is been read okay as part of the Startup checks.