Abstract
The invention discloses an NB-IoT-based water quality monitoring system. The system is a monitoring system developed based on an STM32 platform of the ST Microelectronics. The workflow of the system is divided into three steps: firstly, a temperature sensor and a pH sensor are placed in a solution to be tested, a pH temperature transmitter reads a voltage value in the sensor, converts the voltagevalue into decimal data, and then returns the decimal data into an STM32 main control chip to complete the collection of original data; secondly, the STM32 main control chip obtains a corresponding temperature pH value, and enables a BC28 wireless communication module, connects to a network server, and uploads the data to the server through the BC28 module; and finally, a user logs in a website tocheck the real-time data (temperature, pH value) obtained by the monitoring system and the location of the node, and the user can also select to check the historical data of the node within one month, and the historical data can be displayed to the user in the form of a graph. The NB-IoT-based water quality monitoring system disclosed by the invention can be used for monitoring two indicators ofindustrial wastewater, that is, the temperature and the pH value.
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