Design of room capacity measurement and body temperature detection based on atmega328 microcontroller

Abstract

The outbreak of Corona Virus Disease 2019 (Covid 19) cases that occurred from 2020 until now limits the current maximum allowed room capacity, which is only around 25% to 50% of the maximum room capacity. The purpose of this study is to design a device that can detect temperature and limit room capacity automatically as an effort to prevent the transmission of the covid 19 virus. In designing a room capacity measuring device and an atmega328 microcontroller-based body temperature detector with a viewer on an android smartphone. The ultrasonic sensor HC-SR04 is used to measure the capacity of the room to determine the number of people entering and leaving. Then this tool also uses the MLX90614 sensor to detect the body temperature of everyone who wants to enter with the temperature conditions below 38°C. When both sensors have worked according to their functions, the doorstop can be opened. The results of the data obtained on each sensor will be sent to the microcontroller as a control center on a system so that it can be displayed on the LCD and using an additional device, namely esp8266 as a wifi communication module. After testing it can be concluded that the tool works well. The comparison of the results of the MLX90614 sensor with a standard tool. The data obtained is quite accurate with maximum error only 2.2% with the comparison tool.

IoT applied to counting the number of people in a classroom and measuring body temperature with a built-in alarm system for the prevention of Covid-19

“…Este dispositivo ejecuta todas las aplicaciones y servicios que proporcionan conectividad a los nodos de IoT [8] utilizando varias tendencias que impulsan el futuro de la tecnología de la información, como protocolo de publicación y suscripción MQTT y Node-RED [9]. El modulo electrónico utiliza ESP8266 NodeMCU que esta conectado con el sensor ultrasónico HC-SR04 para determinar el número de personas que se encuentran en el aula, el cual se instalará en un lado de la pared de una entrada [10] y el sensor MLX90614 para detectar la temperatura corporal de todos los que quieran ingresar [11], ya que según la Organización Mundial de la Salud (OMS), uno de los síntomas que acompañan la detección de COVID-19 es el aumento de la temperatura corporal humana por encima de lo normal (37 °C) [7]. solo las personas con una temperatura menor a 38 °C podrán ingresar.…”

Pengembangan Alat Ukur Kadar Air Biji Kopi Berbasis Sensor SHT11 untuk Meningkatkan Kualitas Hasil Olahan Kopi Desa Ketep

“…Diagram blok alat ukur kadar air biji kopi Kelembaban biji kopi dideteksi menggunakan sensor SHT 11(Handayani, Muthmainnah, and Muhammad 2023;Karinia et al 2021;Sugriwan, Ramdhani, and Fahrudin 2021). Sensor tersebut merupakan sensor suhu dan kelembaban yang diproduksi oleh Sensirion dengan tingkat akurasi yang sangat baik ±3% dan tersedia dalam beberapa mode pengiriman data dari 8 bit hingga 12 bit, dilengkapi dengan protocol komunikasi 1 Wire sangar praktis dan menghemat penggunaan I/O pada mikrokontroller(Asril et al 2020; Batubara, Sundawa, and Lestari 2021; Li et al 2021).Keluaran dari rangkaian pembagi tegangan akan dibaca oleh mikrokontroller ATMEGA328(Gadekar et al 2021;Mahardika and Gunawan 2022;Marbun, Karolina, and Hakim 2022). Hasil pembacaan kelembaban kemudian ditampilkan pada LCD karakter.…”