## 3 System Overview
### Patch Connectivity  
Our proposed patch circuit is composed of an LED array, LED driving circuitry, and BLE transmitter chip. The patch is embedded in the patient's arm. Because a direct LOS communication link must be developed between the patch and camera, the patch should be mounted to a completely uncovered part of the body. Our proposed patch circuitry is suitable for monitoring sleeping or unconscious patients. However, the patient may move for some exercise or when he or she goes \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Literature** & \begin{tabular}{c} **Data Transmission** \\ **Technology** \\ \end{tabular} & \
\begin{tabular}{c} **Monitoring Health** \\ **Condition** \\ \end{tabular} &
\begin{tabular}{c} **Data Collection and** \\ **Processing System** \\ \end{tabular} & \multicolumn{1}{c}{**Aim of the Work**} \\ \hline
[7] & BLE & Electrocardiogram (ECG) & Smartphone &
\begin{tabular}{c} Development of a reliable, robust, and low-power system \\ \end{tabular} \\
[11] & ANT & ECG & \
\begin{tabular}{c} Personal computer \\ (FC)-based management \\ \end{tabular} &
\begin{tabular}{c} Designing a low-power, small-sized, and effective monitoring system \\ \end{tabular} \\
[33] & ZigBee & ECG & PC-based management &
\begin{tabular}{c} Designing a system with long \\ battery life and high-quality signal \\ reception \\ \end{tabular} \\
[35] & \
\begin{tabular}{c} IPv6 over low-power \\ wireless personal area \\ networks (6 LoWPAN) \\ \end{tabular} & Glucose level & PC-based management &
\begin{tabular}{c} Utilizing Mobile-Internet of Things \\ (m-IoT)for diabetes management \\ \end{tabular} \\
[36] & Bluetooth & Detection of Alzheimer’s & Bluetooth-enabled &
\begin{tabular}{c} Detecting early Alzheimer’s and \\ augmenting life expectancy \\ \end{tabular} \\
[38] & BLE & Sleep & Smartphone &
\begin{tabular}{c} Developing a reliable magnetometer \\ sensor with low power \\ \end{tabular} \\
[43] & ZigBee & Blood pressure & PC-based management &
\begin{tabular}{c} Easy and clear examination of \\ results \\ \end{tabular} \\
[45] & Bluetooth & Blood pressure & Android smartphone &
\begin{tabular}{c} Accuracy enhancement over the \\ existing technologies \\ \end{tabular} \\
[46] & \begin{tabular}{c} 3G/WiFi enabled \\ 6 LoWPAN \\ \end{tabular} & ECG & \
\begin{tabular}{c} PC-based management \\ with 6 LoWPAN enable \\ edge router \\ \end{tabular} &
\begin{tabular}{c} Providing a flexible technological \\ solution for real-time remote \\ monitoring \\ \end{tabular} \\
[47] & Bluetooth and Global & \
\begin{tabular}{c} Cellphone \\ \end{tabular} &
\begin{tabular}{c} Continuous monitoring and data \\ acquisition from anywhere \\ \end{tabular} \\
[47] & System for Mobile & ECG & Mobile phone &
\begin{tabular}{c} Developing a non-contact electrode \\ circuit with low power \\ consumption and good signal \\ quality \\ \end{tabular} \\
[48] & Bluetooth & ECG & Android smartphone &
\begin{tabular}{c} Development of a low-power \\ sticking patch with reusable battery \\ and adhesive ingredients \\ \end{tabular} \\
[49] & \begin{tabular}{c} 2.4 GHz radio and a \\ proprietary protocol \\ \end{tabular} & \
\begin{tabular}{c} Electromyography (EMG) \\ and oxygen saturation \\ (SpO2) \\ \end{tabular} & PC or smartphone &
\begin{tabular}{c} Development of a low-power \\ sticking patch with reusable battery \\ and adhesive ingredients \\ \end{tabular} \\
[50] & Bluetooth & Detection of toxic volatile &
\begin{tabular}{c} Cell phone \\ tuning fork sensor with high \\ sensitivity and selectivity \\ \end{tabular} \\
[51] & Bluetooth & Oxygen concentration in & Android smartphone or &
\begin{tabular}{c} Design and characterization of a \\ fully wearable system applicable \\ everywhere \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Summary of health monitoring systems developed based on the literature. to a restroom. In these cases, the LED can appear outside the AOV of a camera, which triggers the handover necessity to BLE. The ECG signals can be collected from the body as binary sequences [52].