Rancang Bangun Sistem Pengukur Suhu Tanah Berbasis Tag RFID UHF

Toba, Joana Putri (2025) Rancang Bangun Sistem Pengukur Suhu Tanah Berbasis Tag RFID UHF. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Suhu tanah merupakan salah satu faktor penentu dalam pertumbuhan tanaman karena memengaruhi kelembapan, struktur, bahkan ketersediaan unsur hara. Namun, pertumbuhan optimal setiap tanaman memerlukan suhu yang berbeda-beda. Oleh karena itu, diperlukan sensor pendeteksi suhu tanah. Penelitian ini memanfaatkan dua tag RFID UHF dengan memodifikasi salah satu antena tag sementara tag lain sebagai referensi. Tag modifikasi akan terintegrasi dengan NTC untuk mendeteksi perubahan suhu. Kemudian, dengan memanfaatkan RSSI atau Received Signal Strength Indicator, suhu tanah diestimasikan dengan persamaan dari data selisih RSSI yang didapat. Hasil pengujian menunjukkan bahwa perubahan suhu memengaruhi resistansi dan RSSI yang disebabkan dengan meningkatnya suhu pada tanah, maka nilai resistansi pada NTC akan semakin turun, sehingga RSSI mengalami kenaikan yang menyebabkan penurunan pada selisih RSSI saat suhu semakin panas. Dari perbedaan selisih yang dihasilkan, akan dibuat suatu persamaan dan didapatkan estimasi suhu. Berdasarkan hasil penelitian, tag EPC 9640 dapat dimodifikasi dan digunakan untuk pengukuran suhu tanah dengan menggunakan NTC 200Ω. Pada saat melakukan pengujian diketahui bahwa jarak antar tag RFID UHF, sudut pembacaan, dan kondisi lingkungan sangat memengaruhi nilai RSSI. Untuk meningkatkan akurasi dan presisi, diperlukan konsistensi lingkungan pengujian dan jumlah sampel yang lebih besar.
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Soil temperature is one of the critical factors influencing plant growth, as it affects soil moisture, structure, and nutrient availability. However, each type of plant requires an optimal temperature range that varies. Therefore, a sensor capable of detecting soil temperature is needed. This research employs two UHF RFID tags by modifying one of the tag antennas while the other serves as a reference. The modified tag is integrated with an NTC sensor to detect temperature changes. By utilizing the Received Signal Strength Indicator (RSSI), soil temperature is estimated using an equation derived from the RSSI difference data obtained. The test results show that temperature changes affect the resistance and RSSI; as soil temperature increases, the resistance of the NTC decreases, causing the RSSI to increase, which leads to a decrease in the RSSI difference as the temperature rises. From this difference, an equation is formulated to estimate the soil temperature. Based on the results, the EPC 9640 tag can be modified and used for soil temperature measurement with a 200Ω NTC sensor. During testing, it was found that the distance between the RFID UHF tags, the reading angle, and environmental conditions significantly influence the RSSI values. Although this study successfully estimated soil temperature, the measurements still contain relatively large and variable errors at certain points. To achieve more accurate and precise measurements, it is necessary to maintain consistent testing conditions and increase the number of test samples for more representative results.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Pengukuran Suhu Tanah, RFID UHF, RSSI RFID UHF, RSSI, Soil Temperature Measurement
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.674 Detectors. Sensors T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK6570_iPhone (Smartphone). RFID. Mobile communication systems.
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Joana Putri Toba
Date Deposited:	24 Jul 2025 02:42
Last Modified:	24 Jul 2025 02:42
URI:	http://repository.its.ac.id/id/eprint/120591

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