1 This is a summary of the moisture sensor can be used to detect the moisture of the soil, when the soil is dry , the module outputs a high level , whereas the output low. Using this sensor make an automatic watering system , so that your garden plants need people to manage .

   2 adjustable sensitivity ( shown in blue digital potentiometer adjustment )

   4 Operating Voltage 3.3V-5V

   5 Module Dual Output mode , a simple digital output , analog output more accurate.

   6 with fixed bolt hole for easy installation

   7 small PCB board size : 3cm * 1.6cm

   8 power indicator ( red ) and the digital switch output indicator ( green )

   9 using LM393 comparator chip , stable

• VCC external 3.3V-5V
• GND GND External
• DO small board digital output interfaces ( 0 and 1 )
• AO small board analog output interface

Instructions

• A soil moisture and humidity module most sensitive to the environment , usually used to detect soil moisture .
• Modules in the soil moisture reach the set threshold , DO port output high when soil moisture exceeds a set threshold, the module D0 output low ;
• Digital outputs D0 small plates can be directly connected with the microcontroller through the microcontroller to detect high and low , thereby detecting soil moisture ;
• Small plates digital output DO OUR relay module can directly drive the buzzer module , which can be composed of a soil moisture alarm equipment ;
• Small plates AO analog output modules can be connected and AD through the AD converter , you can get a more accurate value of soil moisture ;