# Smart Tags: IoT Sensors for Monitoring the Micro-Climate of Cultural Heritage Monuments
## 4 Deployment and Results
### Deployment
\begin{table}
\begin{tabular}{|l l l l|} \hline \multicolumn{1}{|c|}{Smart RegID} & \multicolumn{1}{c|}{Protocol Instillation} & \multicolumn{1}{c|}{Outeration} & \multicolumn{1}{c|}{Height (m)} \\ \hline Rho01 & Lighthouse’s exterior walls & South & 5.5 \\ Rho02 & Lighthouse’s exterior walls & North & 5.5 \\ Rho03 & Fort’s exterior walls & West & 3.3 \\ Rho04 & Fort’s exterior walls & East & 3.3 \\ Rho05 & Tower’s exterior walls & East & 12 \\ Rho06 & Tower’s interior walls & West & 35 \\ Rho07 & Roman Bridge’s supports & South & 3.2 \\ Rho08 & Roman Bridge’s supports & North & 3.4 \\ Rho09 & Ptolemies Tomb’s stone & South & 2.5 \\ Rho10 & Corinthian Tomb’s stone & South & 3 \\ Tons01 & Bentegardens’s exterior side & South & 3.5 \\ Tons02 & Bentegardens’s exterior side & West & 3.3 \\ Tons03 & Bentegardens’s exterior side & East & 3.5 \\ Tons04 & Inside the Bentegarden building & North & 2.2 \\ Tons05 & Heierestad Lott’s exterior side & North & 5.4 \\ Tons06 & Heierestad Lott ’s exterior side & South & 5.4 \\ Tons07 & Inside the Heierestad Lott & East & 4.2 \\ Tons08 & Fadum storehouse’s exterior side & South & 3.8 \\ Tons09 & Fadum storehouse’s exterior side & North & 3.6 \\ Tons10 & Inside the Fadum storehouse & East & 4 \\ Tons11 & Western Tower’s exterior side & North & 2.5 \\ Tons12 & Western Tower’s exterior side & West & 2.7 \\ Gra01 & San Jeronimos’s exterior side & East & 15 \\ Gra02 & San Jeronimos’s exterior side & West & 25 \\ Gra03 & San Jeronimos’s exterior side & West & 10 \\ Gra04 & San Jeronimos’s exterior side & South & 16 \\ Gra05 & San Jeronimos’s exterior side & North & 18 \\ Gra06 & Inside the San Jeronimo monastery & East & 20 \\ Ver01 & Torre d’Orologio ’s Exterior side & South & 21 \\ Ven02 & Torre d’Orologio ’s Exterior side & North & 12 \\ Ven03 & Torre d’Orologio ’s Exterior side & North & 6 \\ Ven04 & Torre d’Orologio ’s Exterior side & East & 15 \\ Ven05 & Torre d’Orologio ’s Exterior side & West & 13 \\ Ven06 & Inside the Toree d’Orologio building & South & 3 \\ \hline \end{tabular}
\end{table} 
Table 4: The Smart Tags’ place of installation. In order to evaluate the Smart Tags' reliability, temperature and humidity measurements acquired by the Smart Tags are compared with those gathered by two commercial weather stations installed in the vicinity of the study area in Rhodes. Specifically, the data from the weather station 1 have been taken by a commercial online source for historical and forecast weather [[https://www.visualcrossing.com](https://www.visualcrossing.com)]([https://www.visualcrossing.com](https://www.visualcrossing.com)) (accessed on 28 December 2021), which includes a weather API that gathers meteorological data by various weather stations installed all over world. The second weather station is a commercial weather station installed on the CH site of Rhodes within the context of the HYPERION project for the evaluation of the Smart Tags. The positions of each weather station and the Smart Tag used for the evaluation are depicted in Figure 13 and the distance between them are less than 500 m to ensure credibility. The measurements that are being compared have been taken hourly by the three devices during 5 and 6 of January 2022 and for the timeframe of 9:00 a.m. until 8:00 a.m. The graph of all temperature measurements is presented in Figure 14 and the one for the humidity in Figure 15.  
From the results, we can observe that the measurements acquired by our device are very close to the ones gathered by the two weather stations, with slight deviations during the day of the study. Specifically, the maximum and minimum differences observed on the temperature measurements between the Smart Tag and the two stations are close to 1.7 \({}^{\circ}\)C and 0.1 \({}^{\circ}\)C, respectively. Regarding the humidity data, a maximum deviation of 10% appears from weather station 1 in some time-frames of the day and a minimum deviation of 0.2%. At this point, it is worth mentioning that the same deviations also appear between the weather stations.