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--- amc:ss2025:group-j:start [2025/07/29 17:30] – created 32714_students.hsrw
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 **Jumper wires**
 Jumper wires(fig 6) are used to make temporary electrical connections between the microcontroller and sensors.
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 **Flashlight**
 A flashlight (fig 8) was used to provide light flash since the TSL2591 sensor does not have a built-in LED. It helps charge the phosphorescent stickers to simulate bioluminescence for testing.
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 ===== 5. DISCUSSION =====
 The system, built with an Adafruit QT Py and TSL2591 sensor, successfully measured differences in light intensity between toxic and non-toxic samples. The dark box reduced outside light, improving the accuracy of the readings. Future improvements could include better wireless support and testing with real bioluminescent bacteria.
+==Limitations include :==
+The system only supports 2.4 GHz Wi-Fi, which limited wireless data transfer on 5 GHz networks.
+The light sensor was not sensitive enough to detect weak bioluminescence.
+Ambient light interference required full enclosure in a dark box.
+Data had to be logged manually due to connectivity issues.
+Phosphorescent stickers were used instead of real Vibrio fischeri; testing with actual bacteria is still needed for accurate validation.
 ===== 6. REFERENCES =====
 * [[https://learn.adafruit.com/adafruit-qt-py-esp32-s2/circuitpython|Adafruit QT Py ESP32-S2 Guide: CircuitPython]]