Design and Development of Microcontroller Based Wireless Humidity Monitor
Journal Title: IOSR Journals (IOSR Journal of Electrical and Electronics Engineering) - Year 2018, Vol 13, Issue 2
Abstract
The wireless humidity monitor is widely used in several research laboratories, hospital’s store, industries for research, treatment and diagnosis of the patients, production, storing food and beverage etc. The aim of this research work is to design and development of a low cost, portable microcontroller based wireless humidity monitor. The humidity monitor has been designed using the sensor module DHT22. The sensor operates in capacitive principle i.e. changes in relative humidity (RH) of the surrounding air cause a change in dielectric constant of the polymer film leading to a change of sensor capacitance. The module converts this capacitance change into analog voltage. The DHT22 sensor provides analog voltage for both temperature and humidity. The sensor is connected with Arduino-UNO and a RF 433MHz transmitter is also connected with the Arduino-UNO. The microcontroller of Arduino-UNO converts the analog voltage into digital and the transmitter send the digital data to the receiver. There is a RF 433MHz receiver and a 16x1 Liquid Crystal Display (LCD) is also connected with another Arduino-UNO. The receiver receives the digital data and sends it to the microcontroller of Arduino-UNO and the microcontroller converts the digital data into analog data and displays the data in 16x1 LCD. The program is written in Arduino software (IDE). The accuracy, in measuring humidity, of our designed meter has been found satisfactory.
Authors and Affiliations
Jahedul Islam, Umme Habiba, Humayun Kabir, Kazi Golam Martuza, Fahmida Akter, Farhana Hafiz, Mohammod Abu Sayid Haque, Mahbubul Hoq, Md. Abdul Mannan Chowdhury
Keywords
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