#include <SoftwareSerial.h>

SoftwareSerial BTSerial(2, 3);   // RX | TX
int x = 15; // logic 1, 248 code
int y = 0;  // logic 0, 128 code

void setup() {

  pinMode(2, INPUT);
  pinMode(3, OUTPUT);
  Serial.begin(115200);                     // CHANGING RATE FORM 38400 to 115200;
  Serial.println("Enter AT Commands:");
  BTSerial.begin(38400);  // HC-06 default speed in AT command mode

}

void send1() {
  BTSerial.write(x);
  delay(10);
}

void send0() {
  BTSerial.write(y);
  delay(10);
}

void print_float(float num) {
  union {
    float input;
    int output;
  } data;

  data.input = num;
  for (int i = 31; i >= 0; i--) {
    Serial.print((data.output >> i) & 1);
    if (i % 4 == 0) {
      Serial.print(" ");  // Add a space every 4 bits for readability
    }
  }
  Serial.println();
}

void send_float(float num) {
  union {
    float input;
    int output;
  } data;

  data.input = num;
  for (int i = 31; i >= 0; i--) {
    if ((data.output >> i) & 1) {
      send1();
    } else {
      send0();
    }
  }
}

void loop() {

  //////////////////////////  SEND  //////////////////////////
  //      send_float(5.632);
  //      print_float(5.632);
  //      delay(1000);
  /////////////////////////////////////////////////////////////

  //////////////////////////  RECEIVE  //////////////////////////
  //The code below allows for commands and messages to be sent from HC-06 -> COMPUTER (serial monitor)

      union {
        float flt;
        unsigned long integer;
      } data;
  
      data.integer = 0;
  
      for (int i = 0; i<32; i++) {
        while (not (BTSerial.available())) {
          delay(1);
        }
        int val = int(BTSerial.read());
        if (val > 192) {
          val = 0;
        } else {
          val = 1;
        }
  
        data.integer = ((data.integer << 1) | val);
      }
  
      Serial.println(data.flt);
      delay(10);


  ///////////////////////////////////////////////////////////////////////////


  ////////////////////////////  OLD ////////////////////////////////////////

  //The code below allows for commands and messages to be sent from COMPUTER (serial monitor) -> HC-06
//  if (Serial.available()) {           // Keep reading from Arduino Serial Monitor
//    BTSerial.write(Serial.read());  // and send to HC-06
//  }
//  if (BTSerial.available()) {        // Keep reading from HC-06 and send to Arduino
//    Serial.write((BTSerial.read()));  // Serial Monitor
//  }
//  delay(10);

  /////////////////////////////////////////////////////////////////////////

}