Got the sensors working. So here's where we stand:
Bluetooth: working (turns on and scans, need more testing, mac addr is bogus)
Phone: calls, sms, data working
NFC: working (i think)
Camera: broken, black preview, ...
I'm on RR 7.1.2 so there might be the same environment for installing V4A:
1. Flash V4A zip
2. change audio_effects.conf to audio_effects.conf.bak through this path: system/vendor/etc
3. Instal Busybox from playstore (open app and press install b...