Create OTA from Android 7.0 to 9.0

Hi there,

I was wondering if there was any way to create an OTA file to upgrade from Android Nougat to Pie (Or Oreo if required). We need to update a few of our devices via an OTA update and so far it seems impossible to do so.

So is there any to create a proper OTA that will make it possible to update our devices from Nougat (Based off Khadas’s repos) to Pie (Also based off Khadas’s repos).