Problem was with Tvheadend version in armbian-config: HTS Tvheadend 4.0.9-13~g64fec81
This is little old version of Tvh. Would be nice to put some new version in armbian-config.
Below is install procedure if someone has the same issue with DVBSky Sticks to get DVB-C working on OP Zero:
1. After installing and configure Armbian put DVB Stick to USB and make reboot
2. Install firmware and reboot:
wget http://www.dvbsky.net/download/linux/dvbsky-firmware.tar.gz
tar -zxvf dvbsky-firmware.tar.gz
cd dvbsky-firmware
sudo ./copy-firmware.sh
3. Install TVheadend version 4.2:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 379CE192D401AB61
echo "deb https://dl.bintray.com/tvheadend/deb xenial stable-4.2" | sudo tee -a /etc/apt/sources.list
apt-get update
apt-get install tvheadend
Now DVB-C is recognized in Tvh.
fufu2000 got a reaction from Igor in Couple of questions about OPi PC+/ OPi 0