My iPad pro does not recognize my magic keyboard

I have an iPad pro with a magic keyboard, I’ve had it for half a year and it has been working fine. Yesterday I charged it during the night through the keyboards usb-c port.This morning my iPad was fully charged, but my iPad told me it did not regognize and support my keyboard. I have tried restarting my iPad, removing and reattaching my keyboard many times and have the latest update. But...nothing...Help,what to do?