@Lia be careful washing out all the aluminum dust that the dremel tool will make create, just one particle can short-circuit something and ruin the board.

@Lia I cut the plastic so that it overlaps the window 1cm all around and used Sikaflex to glue it (the stuff used to join the teak on a boat deck). To make it safer I totally covered the plastic with Sikaflex, both inside and outside. I think it's good.

some dremeling to make a window for the antenna, and a bit of clear plastic and sikaflex

@domilito how much is battery voltage? was it charged before you took it apart?

I would like a better quality picture of the board to have an idea on the easiest way to connect the antenna

Modern iPhone or hi-end Android with good lighting is good, focused on the bluetooth module (where it says ILT245s)

@tomfoolery the bluetooth module soldered on the controller board is almost touching the metal plate that closes the box, that blocks the RF (it is surprising that it still works).

An external antenna is possible and I guess it will increase range and reliability enormously. (can be a 1/4 wavelength sized small piece of wire)

Hi all, I found out what the Bluetooth problem is, anyone has a XR controller board on their hands?