Float_to_Array_to_Float

  //------------------------------------------------
void setup() {
  Serial.begin(9600);
  //------------------------------------------------   Float to array
  float z = 22.55;
  unsigned char *chpt;
  chpt = (unsigned char *)&z;
  Serial.print("float  : ");
  Serial.println(z);
  Serial.print("  Hex  : ");
  for (int i = 0; i < sizeof(z); i++) {
    Serial.print("0x");
    Serial.print(chpt[i], HEX);
    Serial.print(" ");
  }
  Serial.println();
  //------------------------------------------------   Array to float
  union {
    char c[4];
    float f;
  } u;
  for (int i = 3; i > -1; i--)
  {
    u.c[i] = chpt[i];
  }
  Serial.print("float  : "); Serial.println( u.f);
}
  //------------------------------------------------
void loop() {
  // put your main code here, to run repeatedly:

}