Humidity Sensor On

The humidity sensor can detect water and other liquid covering the card area. If the card detects water or other liquid covering the entire card, then it will produce a maximum analog value reading.
Since the analog values ​​read by Arduino range from 0 (the lowest reading) to 1023 (the highest reading), a board completely submerged with liquid will be a reading of 1023 by Arduino. If the card is half covered, a reading of about 512 will be read by the Arduino. If the card is covered with a liquid, then the Arduino will read about 256. And if there is no liquid, then a close reading of 0 should be obtained.