KC868-H32B Pro have digital input ports, no analog input ports to use. so if you want add analog sensor, need add another board.
Is there any other method of using this sensor without additional analog board, just a trigger is enough to switch off motor (say for example when water level sensor output voltage reaches 3.2V should trigger D15 to switch off motor supply and no need of monitoring the water level.
you can use float switch sensor, not use analog sensor.