Hi, I have only just began to dismantle my Paperweight (SumUp Reader) I will upload my findings at a later date but currently it seems as though the only way to reset the configuration is with an interface (I haven’t figured out which as yet?) but have I have tried several various software methods. I have managed to make the device discoverable but non writeable! Once I have uploaded the Board & component details (Photos) I am hoping that there will be others that will recognise them & maybe able to offer a schematic?
Unfortunately at this moment in time, I am afraid that a replacement unit is currently the only quick fix solution