Float variable to HEX in Arduino - arduino

Question

I want to convert my float variables into HEX value like 0x00466 or etc. but when I try all the things that I saw in the internet my Serial Console just turns out crazy :D like "' #gA".
I tried this code below
float gyrox, gyroy, gyroz, accelx, accely, accelz, enlem, boylam, sicaklik, yukseklik, basinc;
byte ByteArray[11];
void setup() {
Serial.begin(9600);
gyrox = 1.5;
gyroy = 2.5;
gyroz = 2.0;
accelx = 5.3;
accely = 3.2;
accelz = 6.1;
enlem = 39.9250506;
boylam = 32.8369756;
sicaklik = 35.0;
yukseklik = 103.0;
basinc = 65.31455;
ByteArray[0]=(gyrox,HEX);
ByteArray[1]=(gyroy,HEX);
ByteArray[2]=(gyroz,HEX);
ByteArray[3]=(accelx,HEX);
ByteArray[4]=(accely,HEX);
ByteArray[5]=(accelz,HEX);
ByteArray[6]=(enlem,HEX);
ByteArray[7]=(boylam,HEX);
ByteArray[8]=(sicaklik,HEX);
ByteArray[9]=(yukseklik,HEX);
ByteArray[10]=(basinc,HEX);
}
void loop() {
Serial.println((char*)ByteArray);
}
and the result is ""(:D) I want the result like "0x000466 or anything likte HEX value" so what should I do?

Answer 1

You can cast the float to an array of bytes to get its internal representation. Then you can loop over all of the bytes and print each of them individually.
void printFloat(float const f)
{
// cast the float to an array of bytes
uint8_t const * const byteArray = (uint8_t const *)&f;
// print the start
Serial.print("0x");
// loop over the bytes, sizeof(f) tells us how many bytes make up the float
for (size_t idx = 0; idx != sizeof(f); ++idx)
{
// get the byte for this position
uint8_t const b = byteArray[idx];
// print a zero if b < 16,
// https://stackoverflow.com/questions/19127945/how-to-serial-print-full-hexadecimal-bytes
Serial.print(b>>4, HEX);
Serial.print(b&0x0F,HEX);
}
}

Answer 2

A float is 32 bits long (4 bytes). You can try this:
float f;
Serial.print("0x"); Serial.print(*(uint32_t*)&f, HEX);
If you really need leading zeroes, try this:
void hex_print(uint32_t x)
{
Serial.print("0x");
for (uint32_t mask = 0x0FFFFFFFul; mask && mask > x; mask >>= 4)
Serial.print('0');
Serial.print(x, HEX);
}
// calling as:
float f = 123.456f;
hex_print(*(uint32_t*)&f);