This was the week the prototype truly took shape. We moved from isolated tests into proper prototyping, finishing the ESP32 firmware so the microcontroller could read every input cleanly and reliably. With the code complete, we assembled all of the sensors together for the first time and put them through their paces: the GSR sensor for skin conductance, the MAX30102 for heart rate, and the motion unit that helps us separate real physiological signals from ordinary movement. We tested each one in turn until the whole set behaved as a single, coherent system.