# Multiparametric Monitoring in Equatorial Tomato Greenhouses (II): Energy Consumption Dynamics
## 4 Experiments and Results
### Energy Consumption Dynamics of DigiMesh Network
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c} \hline \hline
**Band Rate** & **Network Element** & **Parameters** & **1** & **2** & **3** & **4** & **5** & **6** & **7** & **8** & **9** & **10** & **Average** \\ \hline \multirow{8}{*}{900} & Coordinance & \(\bar{p}\) (\(\mu\)) & 20.48 & 19.19 & 14.65 & 14.32 & 13.18 & 12.01 & 11.17 & 10.34 & 9.63 & 7.90 & 13.29 \\  & \(\sigma\) (\(\mu\)) & 1.05 & 0.94 & 1.83 & 0.74 & 0.68 & 1.15 & 0.97 & 1.05 & 1.09 & 1.00 & 1.05 \\ \cline{2-13}  & Node 1 & \(\bar{p}\) (\(\mu\)) & 11.21 & 112.34 & 112.55 & 112.03 & 113.14 & 113.44 & 113.88 & 11.99 & 11.429 & 11.44 & 113.25 \\  & \(\bar{p}\) (\(\mu\)) & 0.43 & 0.50 & 0.41 & 0.45 & 0.53 & 0.64 & 0.59 & 0.43 & 0.42 & 0.46 & 0.89 \\ \cline{2-13}  & Node 2 & \(\bar{p}\) (\(\mu\)) & 80.28 & 80.13 & 80.16 & 80.24 & 80.18 & 80.53 & 80.37 & 80.44 & 80.44 & 80.38 & 80.32 \\  & \(\sigma\) (\(\mu\)) & 0.57 & 0.43 & 0.48 & 0.46 & 0.58 & 0.78 & 10.00 & 0.96 & 0.98 & 0.95 & 0.72 \\ \cline{2-13}  & Node 3 & \(\bar{p}\) (\(\mu\)) & 77.01 & 77.17 & 77.23 & 77.25 & 77.2 & 77.18 & 77.37 & 77.37 & 77.37 & 77.26 & 77.23 \\  & \(\sigma\) (\(\mu\)) & 0.71 & 0.60 & 0.71 & 0.78 & 0.63 & 0.70 & 0.59 & 0.39 & 0.71 & 0.85 & 0.46 \\ \cline{2-13}  & Node 4 & \(\bar{p}\) (\(\mu\)) & 15.77 & 15.97 & 15.97 & 15.98 & 159.86 & 15.78 & 15.66 & 14.81 & 161.62 & 161.96 & 159.92 \\  & \(\sigma\) (\(\mu\)) & 0.39 & 0.43 & 0.41 & 0.44 & 0.43 & 0.87 & 0.58 & 0.39 & 0.40 & 0.38 & 0.47 \\ \cline{2-13}  & Transmission Duration & T (0) & 0.71 & 0.68 & 0.68 & 0.68 & 0.68 & 0.70 & 0.68 & 0.68 & 0.67 & 0.67 & 0.68 \\ \hline \multirow{8}{*}{199,200} & Coordinance & \(\bar{p}\) (\(\mu\)) & 10.78 & 0.95 & 8.61 & 2.61 & 7.40 & 7.57 & 6.02 & 5.42 & 4.87 & 4.40 & 2.22 \\  & \(\sigma\) (\(\mu\)) & 1.30 & 1.33 & 1.31 & 1.35 & 1.49 & 1.47 & 0.69 & 0.71 & 0.67 & 0.74 & 1.07 \\Figure 3 shows the set of _pdf_, whose behavior was different from the signals analyzed in Appendix B. The distributions of the ten realizations for the Coordinator Node at 19,200-baud rate showed more stable behavior than those obtained at 9600 and 57,600 bauds. However, the load effect remained present in all runs of the three speeds, which was evidenced in the progressive phase shift of the signals. The plots of Node 1 at 9600 and 19,200 bauds were similar, while a slight offset of the two initial runs was observed at 57,600 bauds. This was caused by the low charge in the battery. We conclude that the load effect on the sensor nodes is hardly visible at high transmission speeds. Based on the high likeness of the _pdf_ of Nodes 2 and 3 for the three speeds, the modification of the value of this parameter does not significantly influence the energy consumption. The offset that was observed in Node 4 _pdf_ at 9600 bauds due to impedance decoupling was imperceptible for these other speeds. Nevertheless, in some realizations, the increase in the transmission speed caused the presence of low consumption values which were distant from the central distribution curve, and these values corresponded to electrical noise, which was more noticeable at 57,600 bauds. By means of the graphs of the CI of each network element at 19,200 and 57,600 bauds, we can identify some characteristics with respect to the 9600 bauds, and the relevant signals are shown in Figure 4. The Coordinator Node was the element with the widest CI for the three speeds; therefore, the variation between the realizations because of the load effect was present in all cases, regardless the communication transmission rate. The multimodal distribution and the size of the intervals were similar at the speeds of 9600 and 57,600 bauds, however, the variation between modes at 19,200 bauds was visibly softer and the CI width was larger. Based on this, we deduced that the data dispersion was more stable, but the loading effect was slightly larger. In addition, the range with the highest concentration of data consumption for this node decreases with increasing transmission speed.