Hi everyone. I've been going back and forth with the ones who developed the board, and it seems that you guys were right - the board is still in its beta stage.
They (the devs) tested it with their own setup and got the same results as mine, and suffice to say the support is no longer offered to troubleshoot this.
I'm pretty stuck to the processor (NUC131LD2AE) because it is one of the few affordable and small boards around with an 800 ksps ADC capability (I needed a high-speed ADC microcontroller for an application which had worked).
They tested it with some I2C-based displays which worked, (Grove 16x2 display) but that's about it.
My option at the moment is to debug the program/library until it works and I'll appreciate it if anyone can point me in the right direction.
Maybe beginning from the I2C library, I guess but I'm not sure where to start.
Anyone?