Universal default passwords were common enough in consumer devices that two governments legislated against them. For a connected lock, the account layer and the leftover programming codes deserve as much attention as the hardware.
An access control system is five components and a set of decisions about credentials, hosting, and wiring. Here is how the pieces fit, where the surprise costs live, and how to phase a rollout by risk.
A knob asks the hand to grip and rotate; a lever asks only for downward pressure. That difference drives accessibility rules, egress logic, and whether a door still works when your hands are full.
