Beta bulid V1 [Serious error, not recommended]

Hardware problems with the first generation design
Details.
Mainly production issues --->
MPU6500 pads are too small for soldering.
FPC cable connector is too fragile
Bad to DEBUG
Messy connections [1 FPC, 2 GPIO, 2 power cables].
PCB connection is difficult to disconnect (forceful disconnection will destroy the PCB).