Moisture Sensor Circuit Using Arduino

The analog output voltage boosts along with the soil moisture level increases.

Moisture sensor circuit using arduino.

Soil moisture is basically the amount content of water present in the soil. Vcc and ground are how the sensor gets the power it needs to operate. A two legged lead that goes into the soil or anywhere else where water content has to be measured. This can be measured using a soil moisture sensor either resistive or capacitive here we will use capacitive soil moisture sensor v1 2 this sensor measures the volumetric content of water inside the soil and.

It has a detection length of 38mm and a working voltage of 2v 5v. The soil moisture sensor module built around the lm393 comparator gives an active low l level output when the soil is dry determined by a pre setted threshold value. Analog mode interfacing soil moisture sensor and arduino. This has two header pins which connect to an amplifier a d circuit which is in turn connected to the arduino.

The sensor gives analog values from 0 1023 and moisture are measured in percentage so we will map these values from 0 100 by using map function in code. Here we connect 3 3v 5v of external power. In this tutorial we have used the waveshare soil moisture sensor. The amplifier has a vin gnd analog and digital data pins.

The first one defines the analog pin of the arduino. Int limit 300. Now that the sensor can measure soil moisture from the coding input we have to test it. A 12volt dc water pump is controlled as the soil moisture increases or decreases below a certain pre defined value.

In order to test the device set up the arduino sensor and different soil samples. Once everything is connected and in sync with the program on the computer place the sensor into a sample of soil. The soil moisture is monitored in real time. If you type in arduino soil moisture sensor into ebay you will see the complete type of sensor needed to build this circuit.

The second defines the analog value of the sensor read by the arduino. In no moisture soil the program should output a value of. The hardware is consists of an arduino microcontroller here an arduino uno r3 and a pre wired soil moisture sensor module. Interfacing soil moisture sensor and arduino.

The sensor has 4 terminals for connection vcc for power gnd analog output and digital output. This project is about arduino and capacitive soil moisture sensor lcd oled interfacing tutorial. A typical soil moisture sensor consist of two components. It has a fork like design which makes it easy to insert into the soil.

Analog mode interfacing soil moisture sensor with arduino using analog pin in this mode we are using the analog pin of the sensor to get output. Capacitive soil moisture sensor arduino in this tutorial you will learn how to use the capacitive soil moisture sensor v1 2 with arduino and display the soil moisture value on a 16 2 i2c lcd module.