Bluetoooth

/*  Arduino Tutorial - How to use a Soil Hygrometer Module
  Dev: Michalis Vasilakis // Date: 18/05/2016 // www.ardumotive.com */

#include <SoftwareSerial.h>

SoftwareSerial BTserial(10, 11); // RX | TX


//Constants
const int hygrometer = A0;  //Hygrometer sensor analog pin output at pin A0 of Arduino

//Variables
int value;

void setup(){

  BTserial.begin(9600);
}

void loop(){

  // When the plant is watered well the sensor will read a value 380~400, I will keep the 400
  // value but if you want you can change it below.

  value = analogRead(hygrometer);   //Read analog value


  BTserial.print("Soil humidity: ");
  BTserial.print(value);
  BTserial.println('%');
  delay(20); //Read every 2 sec.
}