Thanks again. I did try the instruction and still I did not get the code. There was a few seconds flashing LED L1 and back to PWR LED. I even reinstalled the Android App and the only message shown is that “Service Connected”.
I decided to restart the whole thing and I managed to reload the “bootloader” from my PC and everything was shown as “OK”. Then I removed the micro-USB and I expected that this time the connection to the Android device will be establish which I was wrong.
Is there any further stages to complete the bootloader process? I would appreciate if you explain this to me. I could not find anything on WiKi or this forume.