I recently bought my first DIY 3D printer, a Zonestar P802C. Despite the lack of instructions, I have pieced it together and everything works EXCEPT the Z endstop. The piece itself is fine (ive swapped it with the y axis, and the problem remains with the Z axis), but the board itself (ZRIB V3) doesn't ever recognize it being triggered. I don't have any firmware besides the HEX file they included on the SD card, so I have no way to directly edit pin assignments and the like.
At this point, I'm stuck and don't know where to go next...
Any help would be greatly appreciated.