## 3 Materials and Methods
\begin{table}
\begin{tabular}{c c} \hline \hline
**Sensor** & **Features** \\ \hline Motion & DC 4.5–20 V, 50 \(\upmu\)A delay: 5–200 adjustable, Operation Temp.: – 15–70 degrees, Detection Range: 3 m to 7 m. \\ \hline Pressure, temperature & Combines thermometer, barometer and hygrometer. Temperature range from \(-\)40 to +85 \({}^{\circ}\)C with an accuracy of \(\pm\)1 \({}^{\circ}\)C and resolution of 0.01 \({}^{\circ}\)C and for pressure 300–1100 hPa, accuracy of \(\pm\)1 Pa and resolution of 0.18 Pa. Supply voltage range: 1.71 V to 3.6 V. Accuracy tolerance \(\pm\)3% relative humidity. \\ \hline Noise & ULTRASONIC SENSOR HRXL-MAXSONAR. MAX4466 with adjustable gain with a resolution of 1 mm to 1 cm. 20–20 KHz electric microphone. 2.4–5 VDC. 3.7 W. Frequency: 42 kHz. Type: Transmitter, Receiver. Maximum detection distance: 765 cm. Consumption: 2.1 mA. \\ \hline Light & LDR photoresistor sensor module LM393. Voltage: 3.3–5 V. Output Type: Digital. Propagation delay time (\(\upmu\)s) 1.3. Faster response time of 1 \(\upmu\)sec \\ \hline Gyroscope & 7A994. Axis Type: Single. Typical Angular Velocity (\({}^{\circ}\)/s): \(\pm\)300. Typical Operating Supply Voltage (V): 3.31 5. Minimum Operating Temperature (\({}^{\circ}\)C): \(-\)40. Maximum Operating Temperature (\({}^{\circ}\)C): 105. Linearity: No. \\ \hline Air quality & ZPHS01C Multi-in-One Air quality monitoring Sensor Module. Target Gas: PM2.5, CO2, CH2O, TVOC, Temperature and Humidity. Applications: Gas detector, Air conditioner, Air quality monitoring, Air purifier, HVAC system, Smart home. Size: 62.5 mm (L) \(\times\) 61 mm (W) \(\times\) 25 mm (H). Output signal UART/RS485. \\ \hline \hline \end{tabular}
\end{table} 
Table 2: System network technical specifications. Figure 1: Devices of the network system. The proposed system monitors the main activities related to a person at home. For example, motion sensors evaluate movement in some regions of the house every hour. A motion sensor is a device used in monitoring applications for older adults in their homes to detect movement within a specific area. This technology can be used to monitor an individual's daily activities, ensuring that they are safe and secure. These devices can be installed in various home areas, such as the bedroom, living room or bathroom, to provide a comprehensive view of an individual's daily routine. We can monitor sudden changes in environmental conditions through temperature, humidity and pressure sensors. These sensors can help ensure that living conditions are safe, comfortable and healthy. Temperature sensors can monitor the home's temperature and ensure it remains within a safe range, preventing overheating or exposure to extreme cold. Humidity sensors can measure the moisture level in the air, ensuring that it remains within a healthy range to prevent mold or mildew growth. Pressure sensors can be used to monitor changes in air pressure, which can indicate potential weather events or other environmental changes. We can analyze decibel alert conditions for noise sensors that may alert to an unwanted event. These sensors can help ensure that living conditions are safe, secure and peaceful. They can detect a range of sounds, including alarms, sirens and even human voices and can alert caregivers or family members if there are any unusual or concerning noises. Additionally, noise sensors can be used to monitor ambient noise levels, ensuring that they remain within a safe range and preventing exposure to loud noises that could harm an individual's hearing. A light sensor is a device used in monitoring applications for older adults in their homes to detect and report changes in light levels within a specific area. These sensors can help ensure that living conditions are safe, comfortable and well lit. Light sensors can detect changes in natural light levels, as well as changes in artificial lightings, such as turning lights on or off in a room.