COMPARATIVE STUDY OF THE ACCURACY AND PRECISION OF WEATHER TEMPERATURE SENSOR FOR IOT IN DIFFERENT ENVIRONMENT

Abstract

                This research was focused to comparative study of the accuracy and precision of weather temperature sensors for IoT in different environment. The research method used 8 types of sensor devices included DHT11, DHT12, DHT21/AM2301, DHT22, DHT22/AM2302, DS3231, LM35, MLX90614 to test by using with the board NodeMCU ESP8266 and programming in C language to find the results. Testing in different environment between closed area, choose to use the server room of Sripatum University Chonburi Campus and open room, that the results obtained from the test temperature measurement of each sensor in server room will be compared with the thermometer inside the server room. The temperature measurement in the open room will be compared with the Hetaida thermometers model HTD8808E to compare the accuracy of the temperature sensing of the sensors to be tested. The results of the research showed that temperature detection in closed room area was server room of Sripatum University Chonburi Campus. The DHT11 sensor was found to detect temperatures more accurately than others, with an accuracy of 98.11% and had a discrepancy value of 0.4 °C, and that of the temperature detection test in the open area. It was found that there are two types of sensors that detect temperatures more accurately and precision than other types: DHT11 and DS3231, with an accuracy of 98.22% and had a discrepancy value of 0.5 °C. And the results obtained from the research can be concluded that temperature sensor devices that provide accuracy and precision when it comes to detecting temperatures in different environments can still detect the same accurate temperature.