Converting float back to single hex bytes[SOLVED]

Projects Programming
6

Since the data is in a nice binary format that is compatible with the UNO, I would not mess with converting the individual bytes. Define a struct that matches the data structure, manipulate the values in that, and send the struct to the CAN bus.

byte rx_frame[8] = {0XB6, 0X0B, 0XC5, 0X01, 0XC5, 0X0B, 0XB1, 0X00};//incoming data from battery monitor

struct {
  uint16_t voltage;
  int16_t current;
  int16_t temperature;
  uint8_t unused;
  uint8_t stateOfCharge;
} pdo1;

void setup() {

  // start Serial communication
  Serial.begin(9600);

  memcpy(&pdo1, rx_frame, sizeof(pdo1));
  
  Serial.print("Voltage = ");
  Serial.print(pdo1.voltage / 100.0);
  Serial.print(" , Current = ");
  Serial.print(pdo1.current / 100.0);
  Serial.print(" , temperature = ");
  Serial.print(pdo1.temperature / 100.0);
  Serial.print(" , state of charge = ");
  Serial.print(pdo1.stateOfCharge);
  Serial.println('%');

  //print hex values
  uint8_t* ptr = (uint8_t*)&pdo1;
  for (size_t i = 0; i < sizeof(pdo1); i++) {
    if (*ptr < 0x10) Serial.print('0');
    Serial.print(*ptr, HEX);
    Serial.print(' ');
    ptr++;
  }
  Serial.println();

  //change values
  pdo1.voltage = 30.01 * 100.0;
  pdo1.current = 7.91 * 100.0;
  pdo1.temperature = 25.62 * 100.0;

  Serial.print("Voltage = ");
  Serial.print(pdo1.voltage / 100.0);
  Serial.print(" , Current = ");
  Serial.print(pdo1.current / 100.0);
  Serial.print(" , temperature = ");
  Serial.print(pdo1.temperature / 100.0);
  Serial.print(" , state of charge = ");
  Serial.print(pdo1.stateOfCharge);
  Serial.println('%');

  //print hex values
  ptr = (uint8_t*)&pdo1;
  for (size_t i = 0; i < sizeof(pdo1); i++) {
    if (*ptr < 0x10) Serial.print('0');
    Serial.print(*ptr, HEX);
    Serial.print(' ');
    ptr++;
  }
  Serial.println();

  //probable way to send data to the can bus
  //CAN.write((uint8_t*)&pdo1, sizeof(pdo1));

}

void loop() {

}