There are several common practices for monitoring water quality for both drinking water, wastewater and process water. The simultaneous analysis of many chemical parameters often do not allow these waters to be measured without human presence and remotely monitored, even if the demand is high. Among the water parameters is aquaristics, aquapony and two useful, if not the most important in wastewater treatment, are conductivity and pH, which can be measured with simple potentiometric sensors. From the trend-like change of these characteristics, compared to the temperature data, we can conclude the change of the water culture, even the change of important chemical parameters.
One of the R&D developments of Hunify Laboratories Kft is a water quality monitoring tool operating in a general island plant, which saves water parameters in a database on the NB-IoT link. The aim of my thesis is to get acquainted with the modules and sensors that make up the system, to participate in the elaboration of the concept and to prepare the electronics of the measuring instrument. In view of the size of the task, my task is to prepare and measure the electronic plans, and to arrange the circuit and test the sensors for which software support is provided by another colleague.
During the thesis I learned about the background of the problem. I have looked into what aspects make the measuring of water important. I gathered information on the main parameters of water and examined how they relate to the evolution of the wildlife. Based on the information obtained, I have selected the right sensors, microcontroller and the NB-IoT module. I gained practice and experience with the Altium Designer software and digital circuit design. Based on the block diagram, I designed the wiring diagram for the sensors and the associated circuit. Based on the circuit diagram thus obtained, I have developed the appropriate PCB plan that I consider to be the most optimal.