Soil moisture sensor Arduino robot intelligent car

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  • A baby which is a simple water sensor can be used to detect soil moisture when the soil moisture deficit module outputs a high level, and vice versa output low. Use this sensor produced an automatic plant waterer device, so that the plants in your garden without people to manage.

  • Adjustable sensitivity blue digital potentiometer adjustment (Figure)

  • Operating voltage 3.3V-5V-

  • Module dual output mode, the digital output is simple, more accurate analog output.

  • A fixed bolt hole for easy installation

  • Small plates, PCB size: 3cm * 1.6cm

  • Power indicator (red) and digital switching output indicator (green)

  • Comparator LM393 chip, stable

  • Two small plate interface description (4-wire)

  • VCC external 3.3V-5V

  • GND external GND

  • DO small board digital output interface (0 and 1)

  • AO the small plates analog output interface

Three instructions for use

  • Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil.

  • Module in the soil humidity less than a set threshold value when the DO port output high, when the when soil humidity exceeds the threshold value is set, the module D0 output low;

  • Small plates digital outputs D0 can be directly connected with the microcontroller, microcontroller to detect high and low, and thus to detect soil moisture;

  • Small plates digital output DO shop relay module can directly drive the buzzer module, and which can form a soil moisture alarm equipment;

  • Small plates analog output AO and AD module connected through the AD converter, you can get more accurate values of soil moisture;

  • DHT22  Digital Temperature And Humidity Sensor 


  • The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old.

  • Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin!

  • Compared to DHT11,this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive

  • Comes with a 4.7K - 10K resistor, which you will want to use as a pullup from the data pin to VCC.

  • Package Included:

  • 5 x DHT22 Temperature Humidity Sensor

Shipping List

  • Soil moisture sensor:1pcs



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