I have an Eonon GA7157 running a:
CPU: Allwinner R16 1.6GHz Cortex A7 Quad-Core
RAM: SAMSUNG DDR3, 1GB
I have tried App and Firmware 2.x and 3.x. No joy. All I get is "Connecting" when the usb dongle and app is started. It never gets passed this "Connecting..." stage. USB devices like keyboards, mice, USB Flash drives, and even video camera work fine on this headunit. The Zbox Z1 and an OTA tuner don't work for some reason.
I did some more troubleshooting and found out the following: The dongle works perfectly on my PC running Remix. I also tried it on Samsung Table A; on this one, same symptom as the head unit, so I tried using an OTG cable and what do you know, it worked perfectly.
Therefore, I have 2 possible explanations: The headhunt's USB cable needs to be hardwire as OTG or Eonon somehow has decided to block certain type of USB devices that request data asynchronously. Why? I have not clue... I wish I could disable this flag in the OS, but I have not clue where it can be done. My headunit is rooted, so it should be possible in theory.