I have an up2stream amp and looking at the daughter board it is a linkplay A31 V4. The mini also has an A31 but has the second chip on it. Has anyone put an A31 board from the mini on to the AMP? They appear to have the same pin out but linkplay have limited documentation on their site.
Yes, the wifi module is the same and you could replace them safely, just care about the PINs are plugged correctly.