IoT-Enabled Intelligent Motor Protection and Monitoring System for Agricultural Irrigation Pumps
Keywords:
ACS712 current sensor, Agricultural motor protection, Embedded systems, ESP32 microcontroller, IoT, MQTT protocol, Rural transformationAbstract
The proposed system continuously monitors the pump’s supply voltage and current, as well as the hydraulic output. It consists of an ESP32 microcontroller board along with a ZMPT101B AC voltage sensor, an ACS712 Hall-effect current sensor, and a YF-S201 water flow sensor. It has a relay module that is controlled by the microcontroller for disconnecting the motor supply instantly in the event of any faults like under- or over-voltage and under- or overcurrent. The real-time data is transmitted wirelessly using Wi-Fi connectivity through the MQTT protocol to a Node-RED dashboard, which is displayed on the mobile application of the farmers for remote access and control. The proposed system helps in the determination of the irrigation efficiency by comparing the energy consumed by the motor with the actual water flow produced, which acts as an indicator of potential faults in the pump. The accuracy of the voltage and current measurements, as well as the instant of relay switching, was tested, and it was found that the measurement of voltage has an accuracy of ±1.5 V, the measurement of current has an accuracy of ±0.2 A and relay switching instant has an accuracy of 500ms for all the faults tested.
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