The feasibility study: accuracy and precision of DHT 22 on measure the temperature and humidity in the Greenhouse
Intan Kusuma Wardani1*, Annisa Nur Ichniarsyah1, Mareli Telaumbanua2, Budi Priyonggo3, Raizummi Filaini4, Zunanik Mufidah4, Dualim Atma Dewangga

1 Bogor Agricultural Development Polythecnic
Jl. Aria Surialaga, Kecamatan Bogor Barat, Kota Bogor, Jawa Barat, Kode Pos 16119, Indonesia
2 Lampung University
Jl. Prof. Dr. Ir. Sumantri Brojonegoro No.1, Gedong Meneng, Kec. Rajabasa, Kota Bandar Lampung, Lampung,
Kode Pos 35141, Indonesia
3 Indonesian Agricultural Enjineering Polytechnic
Jl. Sinarmas Boulevard, Situ Gadung Nomor. 01 , Kec. Pagedangan, Tangerang, Banten, Kode Pos 15338, Indonesia
4 Institut Teknologi Sumatera
Jl. Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan, Kode Pos 35365, Indonesia

Abstract

The greenhouse is a technology to overcome weather uncertainty as an impact of climate change. It can manage and control the temperature and humidity adjusted to the plant^s needs. Therefore, it requires accurate input of climate data from the monitoring system. The study aims to design an affordable and feasible monitoring system using three DHT22 sensors installed in a greenhouse. In particular, the data is appeared on LCD and is transmitted to the Ubidots platform using EPS32. The accuracy level is quantified by the difference values between DHT22 and the thermos-hygrometer, while the precision level is calculated using the correlation analysis of each sensor. As a result, the accuracy of DHT22 in measuring the temperature and humidity is high, with RMSE 1.48oC and 3.18%, respectively. Furthermore, the correlation values are 0.81 and 0.85. In conclusion, the research successfully produces an appropriate real-time system to monitor temperature and humidity.

Keywords: affordable, accuracy, DHT 22, ESP32, monitoring system

Topic: Digital farming