<![CDATA[The ultraviolet (UV) lamp on the AGT4060 Main Exposure System Photo Polymer machine requires a stable voltage supply for optimal irradiation. Voltage fluctuations, especially when the machine uses a generator set (genset), are difficult for the operator to directly detect, potentially affecting the UV lamp irradiation process. This study aims to design and implement an Internet of Things (IoT)-based UV lamp voltage monitoring system using ESP32 and Blynk to monitor voltage conditions in real-time. The system uses the ZMPT101B voltage sensor as the main sensor and the ACS712 current sensor as a supporting parameter to calculate electrical power. The measurement data is processed by the ESP32, displayed on the I2C LCD as a local monitoring medium, and sent to the Blynk application via a WiFi network as a remote monitoring medium. The system also displays a NORMAL indicator if the voltage is in the 200–240 V range and ABNORMAL if the voltage is outside that range. The test results show that the ZMPT101B sensor has an average error of 1.89%, while the ACS712 sensor is 2.00%, thus meeting the research target with an error rate below 2.5%. During the test, voltage values of 218.0–230.6 V, current 2.38–2.48 A, and power 528.36–554.77 W were obtained, with the system consistently displaying NORMAL status according to the measured voltage conditions.]]>
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