Pengembangan Firmware SCD41 untuk Pemantauan Konsentrasi CO2 Udara di dalam Ruangan pada Bangunan UGM
ARYA DWI PRAMUDYA, Prof. Ir. Oyas Wahyunggoro, M.T., Ph.D.; Dr. I Wayan Mustika, S.T., M.Eng.
2024 | Skripsi | TEKNIK ELEKTRO
Indoor air quality deterioration continues to worsen, posing significant risks to health and productivity. Carbon dioxide (CO2) concentration serves as a key metric for assessing air quality, highlighting the importance of continuous CO2 monitoring. This study focuses on developing firmware for a CO2 monitoring system prototype at Universitas Gadjah Mada, using the SCD41 sensor and I2C communication protocol.
The research underscores the importance of continuous air quality monitoring to comply with health standards, enhance comfort, and boost productivity. To create an effective monitoring system, this study compares the performance of the SCD41 sensor with the MQ135 and optimizes measurement intervals to balance accuracy and power efficiency. During development, an analysis of the I2C protocol between the sensor and microcontroller forms the foundation for firmware development. The firmware was designed by categorizing sensor command types and developing corresponding functions for each category.
Results show that the firmware successfully facilitates I2C communication, is compatible with various sensors and microcontrollers, and adheres to I2C standards. A 150-second interval provides an optimal balance, with power consumption at 0.1771 mWh and a CO2 Mean Absolute Error (MAE) of 23.71 ppm. Although the MQ135 cannot fully replace the SCD41, it is effective for general monitoring. The firmware was tested in an e-Sports club room, a co-working space, and a laboratory. The e-Sports club room has the poorest air quality, with an average CO2 concentration of 1,037 ppm, exceeding the Ministry of Health of the Republic of Indonesia's standard of 1,000 ppm due to limited ventilation and high occupant density. In contrast, the laboratory and co-working space have the best air quality, with maximum CO2 levels of 981 ppm and 602 ppm, respectively, meeting Ministry of Health standards due to effective ventilation and lower occupant density.
Kata Kunci : I2C, pengembangan firmware, konsentrasi CO2, kualitas udara dalam ruangan, Sensirion SCD41