Research and Design of Distributed IoT Water Environment Monitoring System Based on LoRa

Table 5

The experiment result table of alarm response.

Item (threshold)	Test times	Node number	Alarm response times	Average response time (s)
Water temperature (>21°C)	10		10	9.84
			10	9.23
			10	9.46
			10	9.57
pH ( or )	10		10	9.71
			10	9.08
			10	9.42
			10	9.53
Turbidity (>50 NTU)	10		10	9.68
			10	9.21
			10	9.39
			10	9.62