We present here the design, development, and evaluation of an integrated actuator and measurement system based on a nitinol wire, which simultaneously serves as both an actuator and a sensing element. Leveraging the unique thermo-mechanical properties of shape-memory alloys, the system exploits the direct relationship between electrical resistance, displacement, and movement direction to estimate wire length with high precision. The complete setup comprises mechanical, electronic, and software subsystems integrated into a modular embedded platform. The mechanical system uses a pulley-based arrangement with a magnetic encoder for displacement tracking, while the electronic circuit monitors voltage and current to calculate wire resistance in real time. A simple yet effective control algorithm was implemented on a low-resource microcontroller (Arduino Micro), combining displacement–voltage and displacement–resistance characteristics to compensate for the nonlinearity and hysteresis typical of nitinol behaviour. Experimental validation was carried out using a stair-step reference signal within a 0–10 mm displacement range. The results demonstrate that the system can achieve and maintain target positions with satisfactory accuracy despite minor discrepancies caused by measurement noise. Owing to its modular architecture, the proposed solution is scalable for use with multiple actuators, enabling applications in compact medical devices, prosthetic systems, and flexible endoscopes where precise, controllable motion is required. The study shows that even with a simplified control algorithm, competitive performance can be achieved, forming a solid foundation for future improvements and the integration of more advanced control strategies.