Design and Implementation of Low-Cost Smart Home System with Sensor Multiplexing

Abstract

In the general smart home, the system is an add-on to home automation and automation of systems guarantees human comforts like lighting, heating, ventilation, and security. In this proposed work, we have designed and implemented a low-cost smart home system using sensor multiplexing technique which is extendable, cheap, and multi-faceted and supported Node MCU (ESP8266). The sensors are used in the smart home to detect various flammable gases with the help of MQ-6 (LPG), MQ-7 (CO), and MQ-135 (CO 2 ) and environment parameters like temperature and humidity with the help of DHT11 sensor, and finally to detect intruder with the help of passive infrared rays (PIR) sensors. All the sensors' information is to measure and at the same time to upload it to IoT cloud (Ubidots) platform, and any sensor that exceeds its threshold value indicates an alert message on the LCD at the same time piezo-buzzer alerts in the form of beep sounds in surrounding areas. The major development of a home automation system is to comprehend most home appliances that use Wi-Fi for remote observance. Technological progress has increased the implementation of home systems leading to improved standards of living. Industrial smart home systems are still unaffordable to an enormous of the center and social class families. However, the emergence of low-cost microcontroller development boards, just like the Node MCU (ESP8266), has enabled the implementation of cheap and efficient home systems.

Smart Home System: A Comprehensive Review

“…A WSN system for elderly people's care is proposed in [23]. Te sink node is connected to the sensors in a WSN system via a wireless connection [24][25][26]. A wireless sensor network has been used in [27] along with Raspberry Pi to design and implement a smart home environment monitoring structure.…”

“…ESP microcontrollers have gained popularity mainly because of the integrated Wi-Fi feature, which helps make an IoT system [89]. Despite being an old version, ESP8266 is still used due to its high efciency and multiple electronic component handling capabilities [26,136]. A cost-efective smart home automation system (SHAS) with ESP8266 in [90] showed that it is easier for the user to connect a new device to the system without worrying about confguration.…”

“…Te most popular humidity sensor used by SHS researchers is DHT11, which can measure temperature as well. In SHSs, a humidity sensor is generally used for monitoring room moisture levels [26,78], home automation [75], and early warning systems [52].…”

“…A pressure sensor is an electronic device that can measure the pressure of liquid or gas through a pressure-sensitive element. In an SHS, it could be used for multiple purposes such as room atmosphere monitoring [26], measuring the blood pressure of home occupants for health monitoring [23], or monitoring home activities [51,82]. Accelerometer.…”