Moisture Sensor YL-69 & YL-38

by | Aug 27, 2017 | 0 comments

This soil soil moisture sensor can be used to detect moisture to activate a display or trigger an action. When the soil is dry, the module output is set high, when wet low.

Use this sensor make an automatic watering system, to keep your garden plants well without anyone having to manage them.

Usually sold as two parts: a fork-shaped moisture probe with two connections and a module board with 2 connections for the probe and 4 connections:

  • Vcc
  • GND
  • D0
  • A0


  • Operating voltage: 3.3V~5V.
  • Adjustable sensitivity (blue digital potentiometer adjustment) affects digital signal
  • Dual output mode, analog output more accurate.
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