According to the usb device descriptors it's a USB HID device. That's basically everything I know. Once I discovered libusb doesn't seem to support USB HID very well, I didn't investigate much further due to a lack of time.
I wouldn't be surprised if the high level communication protocol is still the same as the other Uwatec devices. For the Meridian Scubapro/Uwatec also switched only the low-level layer from IrDA to usb-serial, and kept everything else the same. But of course that's just an educated guess, and I could be complete wrong.
Jef
Poor of me, the new scubapro aladin square is not integrated in libdivecomputer (not in subsurface too...), it's the son of the famous uwatec aladin pro...
I've just tested hidapi testgui (https://github.com/signal11/hidapi) and i success in connecting scubapro aladin square. What can i do now to help (i'm not a programmer)?
Vavincavent