Electronic Theses and Dissertation

Kekurangan unsur hara, ketidaksesuaian suhu dan kelembaban pada tanah dapat menyebabkan pertumbuhan tanaman terganggu. Oleh karena itu perlu adanya instrumen yang dapat mengukur nutrisi, suhu, dan kelembaban tanah. Dalam penelitian ini dirancang alat untuk mengukur kadar Nitrogen, Fosfor, Kalium (NPK), suhu, dan kelembaban tanah. Alat dirancang menggunakan sensor NPK SEM225, sensor suhu DS18BB20, sensor kelembaban tanah SEN0114. Mikrokontroler arduino digunakan untuk memproses data dari sensor dan hasil akhir ditampilkan pada LCD OLED 128×64 melalui komunikasi I2C. Untuk menguji kinerja, alat yang dirancang dibandingkan dengan alat komersial. Akurasi kinerja alat yang dirancang dibandingkan dengan alat komersial didapatkan bahwa sensor suhu sebesar 99,44%, sensor kelembaban tanah sebesar 91,72%, dan sensor NPK dapat mengukur kadar NPK dengan akurasi N 71,87%, P 96,98%, dan K 87,38%. Hasil pengukuran suhu diperoleh dengan kesalahan

Lack of nutrients, incompatibility of temperature and humidity in the soil can cause plant growth to be disrupted. Therefore, an instrument is needed that can measure nutrients, temperature, and soil moisture. In this research, a tool was designed to measure levels of Nitrogen, Phosphorus, Potassium (NPK), temperature, and soil moisture. The tool was designed using the SEM225 NPK sensor, the DS18BB20 temperature sensor, and the SEN0114 soil moisture sensor. An Arduino microcontroller was used to process data from sensors, and the final results were displayed on a 128×64 OLED LCD via I2C communication. To test the performance, the designed instrument was compared to a commercial instrument. The performance accuracy of the designed tool compared to commercial tools show that the temperature sensor is 99.44%, the soil moisture sensor is 91.72%, and the NPK sensor could measure NPK levels with an accuracy of N 71.87%, P 96.98%, and K 87.38%. The temperature measurement results are obtained with an error of