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The Vibration module based on the vibration sensor SW-420 and Comparator LM393 to detect if there is any vibration that beyond the threshold. The threshold can be adjusted by the on-board potentiometer.
The DHT11 is a relatively cheap sensor for measuring temperature and humidity.
This switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other devices.