Monitoring system is a system used to monitor work processes in factory design. The purpose of this research process is to monitor or observe the object to be made. And in this study used the experimental method of Prototype Controlling and Monitoring of Water Levels on IoT-Based Sluice (Internet of Things) which was carried out on July 28, 2021 at Graha Asri Housing and the design, collection of data obtained from the analysis of the results provided by the tool, and the
technology of designing a water level monitoring system at the sluice using the ESP8266 module, ultrasonic sensor, servo, pressure reduction, and instruments. digital, lcd 1602 And firebase. The test results show that the micro work test of all
supporting components can achieve the best working conditions, normal manual
status water level >19 is said to be appropriate, standby 1 water level >13 is said
to be appropriate, standby 2 water level <13 is said to be appropriate and standby 3 water level <9 is said to be appropriate, namely the power working circuit can
provide a stable voltage for all components, the ultrasonic sensor can work
normally and accurately to read the water level, and the servo moves as needed. The system program opens and closes the floodgates.
Keywords: Servo, ESP8266 module, Web FireBase.