Design and Development of Temperature and Humidity Monitoring System

Abstract

The temperature and humidity monitoring system was developed using various components viz., Arduino Uno, DHT11 sensor, universalserial bus (USB) type B cable, adaptor, DC power jack, 9-V battery connector, 9-V DC battery, resistor, liquid-crystal display (LCD) screen,trimmer potentiometer, light-emitting diode (LED) bulbs, jumper wires, micro secure digital (SD) card module, printed circuit board(PCB), etc. The field testing of the developed temperature and humidity monitoring system was carried out at various locations of thecollege campus. It was observed that the system worked between the percent variation of 0–8.00% for temperature and 0–5.97% forhumidity. The developed system showed the accuracy of ±2°C for temperature and ±4% for humidity. The total cost incurred for thedevelopment of temperature and humidity monitoring system along with all accessories was ₹1625.