The Homematic IP door lock actuator HmIP-DLD-A is an intelligent retrofit solution for automating existing door locks in private homes. The device enables electronic control of the door lock without requiring a complete replacement of the existing locking system. Integration into the Homematic IP smart home system allows for convenient and flexible access management. The door lock actuator is mounted on the inside of the door and automatically locks and unlocks the door. It can be operated via the Homematic IP app, compatible smart home components, or individually configured automations. This simplifies everyday routines and significantly increases user convenience. A key advantage of the system is its integration into the Homematic IP ecosystem. The door lock actuator can be combined with sensors, alarm functions, and other automation components. For example, routines can be created to automatically control the lock based on schedules or specific events. The design is intended for retrofitting and, in many cases, can be implemented without major structural modifications. This makes the device particularly interesting for users who want to modernize existing doors and add smart home functionality. The anthracite-colored housing boasts a modern and discreet design that blends harmoniously into various living environments. The control system operates precisely and ensures reliable operation of the locking cylinder. At the same time, manual operation of the lock is retained, allowing the door to be used in the traditional way. This combination of classic and digital operation increases everyday flexibility. In terms of security, the door lock actuator offers controlled management of access permissions within the smart home system. Actual system security also depends on the correct network setup and the authentication mechanisms used. The build quality meets the standards of modern smart home components and is designed for long-term, continuous operation. Robust materials and stable mechanics ensure reliable operation with regular use. Overall, the Homematic IP HmIP-DLD-A represents a modern and functional solution for intelligent access control and impresses with its easy retrofitting, smart home integration and high ease of use.