#include <SoftwareSerial.h>

SoftwareSerial mySerial(0, 1); // RX, TX

const int waterLevel = A0;
int waterValue;
int mq2_analogPin = A1;

void setup()
{
  Serial.begin(9600);
  while(!Serial){
    ;
  }
  Serial.println("Serial Online");

  mySerial.begin(9600);
  while(mySerial){
    ;
  }
  delay(1000);
  mySerial.println("Hello !");
  Serial.println("Bluetooth online");

}

void loop()
{
 String bluetoothData;
 mySerial.listen();
 while(mySerial.available()) {
    mySerial.println("Je mesure...");
 }



}