#include <SoftwareSerial.h>

SoftwareSerial BT(10, 11); //10-tx, 11-rx
char BluetoothData;
//float pi = 3.14;
//boolean ok = false;
//char BluetoothData2[10];

void setup() {
  // put your setup code here, to run once:
  //dtostrf(125.65,10,3,BluetoothData2); //conversie float to char
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
  BT.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (BT.available()) {                     //verific cat timp este conectat la modulul bluetooth
    BluetoothData = BT.read();              //salvez in variabila BluetoothData cea ce primesc prin transferul serial
    if (BluetoothData == '1') {
      digitalWrite(LED_BUILTIN, HIGH);      // in functie de mesajul primit se va aprinde respectiv stinge un led de pe arduino
      BT.println("LED on");                 //mesajul de aici va fi afisat pe android, in aplicatia creata de rares
    } else if (BluetoothData == '0') {
      digitalWrite(LED_BUILTIN, LOW);
      BT.println("LED off");
    }
  }

}