## 5 Results and Evaluation
### Temperature Data Evaluation  
Blockchain temperature is an important factor in monitoring the blockchain energy consumption behaviours of low-powered microcontroller devices. Health sensors and sensor-based aided devices are battery-powered devices that can be damaged by high temperature [29]. Particularly, if health sensors are damaged or corrupted due to high temperatures, health data can be lost [30]. Additionally, in high-temperature conditions, health sensors may observe false data. Therefore, analysing the temperature levels of the hardware devices that we use to process blockchain algorithms is crucial for implementing blockchain-based health sensor networks [31]. We have individually analysed how device temperature varies based on three blockchain algorithms. Figure 7 shows the temperature variations of Hydrachain blockchain nodes. Figure 7's results indicate that the temperature of each individual blockchain node deviates from 65 \({}^{\circ}\)C to 71 \({}^{\circ}\)C.  
Figure 8 shows the mean Hydrachain temperature of the blockchain nodes. The maximum mean temperature recorded at the first blockchain node was 65.49 \({}^{\circ}\)C. Additionally, the highest at the seventh blockchain node was recorded as 68.49 \({}^{\circ}\)C. High temperatures may damage the hardware components of microcontroller devices [32]. Figure 9 displays the Monero temperature variation observed while transmitting data blocks. Figure 8: Hydrachain blockchain nodes’ mean temperature levels. Figure 7: Hydrachain blockchain nodes’ temperature levels. Figure 9's results show that the Monoro blockchain algorithm temperature values are lower than those of the Hydrachain blockchain algorithm. The temperature values of the Monero blockchain algorithm deviate from 57 \({}^{\circ}\)C to 60.5 \({}^{\circ}\)C. This may result in lower energy consumption in Monero blockchain sensor networks [33]. Figure 10 shows the mean Monero temperature variations in individual blockchain nodes. As Figure 10 indicates, the maximum mean temperature recorded at the first blockchain node was 59.68 \({}^{\circ}\)C, and the minimum was recorded at blockchain node 7, at 58.22 \({}^{\circ}\)C.  
Additionally, we analysed the temperature variations in the Duino coin blockchain algorithm, and Figure 11 shows the temperature values measured while using the Duino coin blockchain algorithm to transmit sensor data [34]. Figure 10: Monero blockchain nodes’ mean temperature levels. Figure 9: Monero blockchain nodes’ temperature levels. As Figure 11 shows, the Duino coin blockchain algorithm shows the highest temperature values while transmitting sensor data, compared to the Hydrachain and Monero blockchain algorithms. According to Figure 11, the Duino coin blockchain temperature values deviate from 81 \({}^{\circ}\)C to 85 \({}^{\circ}\)C. This indicates that the heat of the Duino coin blockchain algorithm is typically high when compared to other two blockchain applications [35]. Figure 12 shows the mean Duino coin temperature variations observed while transmitting data. As the graph indicates, the mean temperature of all seven blockchain nodes is over 80 \({}^{\circ}\)C.  
Figure 13 shows us the average temperature of microcontroller devices that were used to process three blockchain algorithms [36]. Additionally, Table 1 shows an overall summary of the mean temperature values that the hardware devices indicated while processing Hydrachain, Monero and Duino coin blockchain algorithms [37]. Based on this analysis, we can emphasise that the temperature levels of the Monero blockchain algorithm are lower than those of the Hydrachain and Duino Coin blockchain algorithms in a wireless sensor network environment. Additionally, as Table 1 indicates, device temperature levels  
Figure 11: Duino coin blockchain nodes’ temperature levels. Figure 12: Duino coin blockchain nodes’ mean temperature levels. can vary for different reasons, such as data transmission and receiving time periods, CPU core usage levels, device location, and environmental factors such as heat [38].