Telah dilakukan perancangan sistem kontrol temperatur dan kelembaban tanah pada rumah kaca berbasis mikrokontroler Arduino Uno. Sensor yang dipakai dalam penelitian ini yaitu sensor LM35 dan Soil Moisture YL-69 sebagai pendeteksi temperatur dan kelembaban tanah. Temperatur dan kelembaban yang terdeteksi ditampilkan pada LCD 2x16 karakter. Sistem kontrol menggunakan kontrol on/off untuk menghidup-matikan relai yang terhubung pada lampu pijar sebagai sumber panas, kipas sebagai pendingin dan pompa air untuk mengalirkan air pada penyiraman. Nilai temperatur yang diinginkan diatur dengan push button dan ditampilkan pada LCD. Uji akhir alat memperlihatkan bahwa alat ini mampu mengontrol temperatur dan kelembaban tanah di dalam rumah kaca. Rentang temperatur dan kelembaban tanah yang diuji berturut-turut adalah antara 27oC-31oC dan 10%-50%.Kata kunci: Rumah kaca, kontrol on/off, LM35, Soil Moisture YL-69, Arduino Uno
A wireless data logger system measuring indoor acoustic quality was developed using a NodeMCU ESP8266 and microphone sensor KY-037. The acoustic quality is based on parameters of sound pressure level and reverberation time. The system consists of a transmitter unit and a receiver unit. The transmitter unit is equipped with a Microphone KY-037 sensor as a sound detector and NodeMCU ESP8266 as a microcontroller and serial communication with the database. The transmitter unit of this measuring instrument is set at predetermined position points in a room. The results of testing the sound pressure level have an error percentage of 2.09% compared to the Digital Sound Level Meter GM1356 tool. Comprehensive testing of the tool has sent and processed sensor measurement data wirelessly into the database. The processed data is displayed through a GUI web server in the form of a background noise average, an average of the reverberation time value, and a graph of the sound pressure level in the room.
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