Game Input MultipleXer

I think that everything is conected right. The problem is that I can´t find any ps button in the wheel. I push the first red button starting from the left and nothing happens. How can asign a ps button to g27

Do you still get the "Driver file operation error. DeviceIoControl failed (Cannot create a file when that file already exists. Error code = 183)" message?
If yes, could you please open a cmd terminal and type (copy-paste) the following commands: and then post the output?
If you run a 64bit Windows, replace the first line with:

C:\Program Files\UsbDk Runtime Library>UsbDkController.exe -n
Enumerate USB devices
Found 3 USB devices:
0. FilterID: 1, Port: 2, ID: 046d:c050, Configs: 1, Speed: 2
USB\VID_046D&PID_C050 2
Descriptor for configuration #0: size 34
1. FilterID: 2, Port: 1, ID: 0a12:0001, Configs: 1, Speed: 2
USB\VID_0A12&PID_0001 1
Descriptor for configuration #0: size 193
2. FilterID: 5, Port: 5, ID: 058f:6362, Configs: 1, Speed: 3
USB\VID_058F&PID_6362 058F63626376
Descriptor for configuration #0: size 32

C:\Program Files\UsbDk Runtime Library>

I tried with both the golduino and bitorino boards, that have the same AT90USB162 chip, and I installed everything in my laptop too and always the same thing. Test button and it says that everything is ok. I push the start button and no errors are displayed, but none of the g27 button works. I plugged the g27 in the ps3 to check if the issue could be the wheel, and everything works. OMG I´m so sad. So the problem could came from the cp2102?

Do you still get the "Driver file operation error. DeviceIoControl failed (Cannot create a file when that file already exists. Error code = 183)" message?

No. This is what I get from the log option:
option -l with value `log.txt'
option -c with value `LogitechG27_G29.xml'
option -p with value `COM7'
status flag is set
subpos flag is set
force_updates flag is set
native mode is already enabled for HID device \\?\hid#vid_046d&pid_c29b#6&38145899&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030} (PID=c29b)
Detected USB adapter: G29 PS4.
using default refresh period: 5.00ms
macros are not available for: joystick PS4 Controller (0)
Warning: can't open macro directory C:\Users\PEDRO\AppData\Roaming//gimx//macros/
0 1454335765.556626
Exiting

But if I select the option messages none. No error appears and it says "config seems ok".

Which firmware did you load?

Logitechg27_g29
Mi computer has windows 8 o.s. installed. I tried with the same firmware for w10 but it shows the error message of "joystick not found logitech g27 racing wheel". If you are asking about the avr board firmware it was loaded the at90usb162 firmware from the EMUG29PS4

Do you see any feedback in the command windows when you press the PS button of the Dualshock 4?

Nothing happens when I push the ps button in dualshock 4 nor when I push any of the g27 buttons, gimx starts ok and I don´t receive any error message.

You don't see any "PS" message in the logs?