Hi,
I tried to do your suggestion (I installed the overlay rpi-tv-overlay) on mi OrangePI 2+ and the Raspberry DVB TV uHAT correctly inserted (green led on).
Anyway not working. No new device /dev/dvb and no adapters present in tvheadend configuration box.
Any other suggestion ?
One other question: the aerial on the uHAT connector is unaccessible because the OrangePI board layout. At the begin I would to see the device to work. After I'll find a solution for the connector.
Thanks
Luigi