Qt and QML can make embedded HMIs look modern, but the decision is architectural, not cosmetic. This is an English DEV.to draft based on a Silicon LogiX technical article. The canonical source is linked at the end. Why it matters A good HMI must be responsive, maintainable and predictable under product constraints. Qt is powerful when the device has enough resources and the team needs a rich, cross-platform interface. Architecture notes QML separates declarative UI from C++ backend logic, which helps teams iterate on screens without rewriting drivers. Qt fits well on embedded Linux systems with GPU acceleration and a clear display pipeline. On smaller devices, LVGL or custom rendering may be more appropriate. The backend should expose stable models and state machines, not raw hardware details. Practical checklist [ ] Measure boot time, frame rate, memory and storage with the real theme and assets. [ ] Define how UI state maps to device state and error conditions.…