# Industrial-Grade Edge Computing Device for Smart Furniture Products
## 4 Solution/Candidate Product
Moreover, 2.5\({}^{\prime\prime}\) and 1.8\({}^{\prime\prime}\) boards were dismissed for their general lack of expandability, and Nano-ITX options were dismissed due to their high z-height dimension and lack of expansions. The selected single-board PC (SBPC) belongs to the remaining group of 3.5\({}^{\prime\prime}\) boards that met all of the required elements (both physical and logical). The board itself is less than 15 \(\times\) 10 cm in size and less than 2 cm in height (not breaching the height of the needed connectors). The thermal solution and chassis can be adapted to serve installation restrictions. A power supply is needed (DC, 12-24V). An example of the product (top side) is shown in Figure 1[26; 27]. The basic IT specifications of this device are as follows:  
Intel Celeron N6210 processor (dual-core processor with a maximum clock rate of 2.6 GHz). The thermal design power is 6.5 W, assuring the minimum thermal dissipation and influence on the chassis design and system performance. It is 64 bit, with smart connectivity capabilities capable of housing virtual machines and applications such as additional security software. An example of the device can be found in [23]:  
* Random access DDR4 memory: 4 GB; \begin{table}
\begin{tabular}{l c c c c c} \hline \hline  & **Mini ITX** & **3.5\({}^{\prime\prime}\) Board** & **Nano-ITX** & \
\begin{tabular}{c} **2.5\({}^{\prime\prime}\)** \\ **Board** \\ \end{tabular} &
\begin{tabular}{c} **1.8\({}^{\prime\prime}\)** \\ **Board** \\ \end{tabular} \\ \hline
**Board size [mm]** & 170 \(\times\) 170 & 146 \(\times\) 104 & 120 \(\times\) 120 & 100 \(\times\) 72 & 85 \(\times\) 56 \\
**x86 compatible** & YES & YES & YES & YES & YES \\
**Multi display** & 4 & 3 & 3 & 2–3 & NO \\
**SoC integrated** & N/A & YES & YES & N/A & YES \\
**Expansions** & 3+ (Full size) & 2–3 & 2 & 1 (up to 2) & 1 \\
**LAN** & 2 & 2–4 & 2 & 1–2 & 1 \\
**Flat design** & NO & YES & NO & YES & YES \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Potential candidates and their characteristics. Figure 1: Single-board PC: 3.5\({}^{\prime\prime}\) format. * CFast-type storage module connected to SATA port: 16 GB or 32 GB;
* Up to four serial ports for legacy communication (two of them being RS-422/485-capable);
* Gigabit Ethernet RJ-45 port + 2.5 Gbit RJ-45 port;
* DI/O--eight channels;
* Temperature working range: \(-\)20 up to +70 \({}^{\circ}\)C, with 10 to 95% relative humidity. The other/additional items visible in Figure 1 are the following: internal LVDS and USB connection points; internal COM points for previously presented COM ports; DC-in point; SystemOnChip; eD point; external HDMI, DP, USB, and Ethernet ports. Expansions to this basic board are possible in the form of additional communication modules that can be fit to Mini-PCIe or other onboard M.2 slots. These boards are needed in order to expand communication capabilities, as these were some of the requirements. Table 7 lists the selected product conformance with the requested specification. Single-board computers (SBCs) have emerged as essential components in Internet of Things (IoT) applications due to their integrated design, combining processing, memory, and I/O capabilities on a single circuit board. This analysis examines industrial single-board PC form factors through four critical criteria: physical form factor, TDP, connectivity and expansion options, and x86 compatibility, with particular focus on the 3.5\({}^{\prime\prime}\) SBPC form factor's suitability for connected furniture in home environments. As furniture becomes increasingly integrated with smart home ecosystems, selecting appropriate computing platforms becomes crucial for successful implementation and user adoption. This research synthesizes academic findings to determine whether the 3.5\({}^{\prime\prime}\) SBPC form factor represents an optimal balance of these criteria for furniture-embedded computing systems. Industrial SBCs come in various standardized dimensions that impact their integration potential in furniture applications.