마이크로비트 기반 데이터 자동기록에서 시간 정보 신뢰도 개선 방안

초록

This study examines whether data logging using the micro:bit can provide the temporal resolution and stability required for school science inquiry, and proposes a method for recording time information more reliably. To this end, the accuracy of the micro:bit’s internal timer is verified through comparison with a PC timer, and the execution time and variability of key functions involved in data collection–such as basic computational blocks, Analog-to-Digital Conversion (ADC), digital pin reading, serial communication, and radio communication–are experimentally analyzed. The results show that serial communication is the primary factor limiting temporal resolution and the reliability of recorded time data. Accordingly, this study proposes a modified data logging method in which the sensor measurement time is first recorded using the internal timer, and then transmitted together with the sensor data. The proposed approach significantly reduces the mismatch between the measurement time and the recording time, thereby improving the reliability of time-series data obtained using the micro:bit.

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