Research Article
Research and Design of Distributed IoT Water Environment Monitoring System Based on LoRa
Table 4
Node monitoring results on November 17, 2019 (light rain weather).
| | Monitoring time | Water quality parameter | Standard value | Node actual value | Relative error (%) |
| | 00 : 00 | Water temperature (°C) | 16.71 | 16.65 | -0.35 | | pH | 8.13 | 8.11 | -0.24 | | Conductivity (mS/cm) | 0.31 | 0.30 | -3.23 | | Turbidity (NTU) | 26.3 | 26.2 | -0.38 |
| | 08 : 00 | Water temperature (°C) | 17.05 | 17.07 | +0.12 | | pH | 7.90 | 7.87 | -0.37 | | Conductivity (mS/cm) | 0.34 | 0.33 | -2.94 | | Turbidity (NTU) | 26.1 | 26.5 | +1.53 |
| | 16 : 00 | Water temperature (°C) | 17.18 | 17.33 | +0.87 | | pH | 8.42 | 8.41 | -0.12 | | Conductivity (mS/cm) | 0.33 | 0.34 | +3.03 | | Turbidity (NTU) | 26.5 | 26.7 | +0.75 |
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