Write firmware for Arduino, assemble a layout of the control unit

Programmer services are required. You need to write a program for the controller (based on arduino) to control (open) the electrical locks and monitor the status of the end switches for the automatic storage chamber. The controller is connected to the relay and end switches of the storage chamber cells (2 pcs to 64 pcs with the possibility of expansion). The relays open the electrical locks. The controller receives a command to open a specific cell from the external control unit (IBM-PC) via USB. The controller, in turn, transfers via USB to an external control unit (IBM-PC) the state of the terminal switches of the storage chamber cells. In the part of storage cells, in addition to controlling the electrical lock, you need to control an additional relay to turn on the cooling system of the cell.