Contents
How does moisture sensor work?
A small charge is placed on the electrodes and electrical resistance through the sensor is measured. As water is used by plants or as the soil moisture decreases, water is drawn from the sensor and resistance increases. Conversely, as soil moisture increases, resistance decreases.
Why do we use Soil Moisture Sensor?
The Soil Moisture Sensor is used to measure the volumetric water content of soil. This makes it ideal for performing experiments in courses such as soil science, agricultural science, environmental science, horticulture, botany, and biology.
How do capacitive soil moisture sensors work?
A capacitive moisture sensor works by measuring the changes in capacitance caused by the changes in the dielectric. Capacitive measuring basically measures the dielectric that is formed by the soil and the water is the most important factor that affects the dielectric.
Can a soil moisture sensor be used in analog mode?
This sensor measures the volumetric content of water inside the soil and gives us the moisture level as output. The sensor is equipped with both analog and digital output, so it can be used in both analog and digital mode. In this article, we are going to interface the sensor in both modes.
What are the units of output of soil moisture sensor?
I want to use a soil moisture sensor using arduino uno R3. I am using the analog output. The values are in the range of 100 to 1300 as in the readings mention in this question. May I know what exactly these numbers mean? I read in a website that:
How is soil moisture measured on an Arduino?
When taking the analog output from the soil moisture sensor FC-28, the sensor gives us the value from 0-1023. The moisture is measured in percentage, so we will map these values from 0 -100 and then we will show these values on the serial monitor.
What kind of pin does soil moisture sensor use?
DO (Digital Output) pin gives Digital output of internal comparator circuit. You can connect it to any digital pin on an Arduino or directly to a 5V relay or similar device. VCC pin supplies power for the sensor.