This project is built around a positioning controller with two clearly distinct operating modes.
In local mode, the operator drives the motors directly through an LCD interface that shows current position, system status, and movement state in real time. In remote mode, a UART serial link lets an external system take over and send automated positioning sequences programmatically.
The motor control logic is designed to ensure repeatable and predictable positioning. The ATmega2560 handles it all: motor control, HMI management, serial communication. Straightforward and functional — sometimes that’s exactly what a project needs to be.