GPS data to EEPROM

Projects Programming
1

How to split huge float to 8bit bytes?
Then write/read it to EERPOM

2

Use EEPROM.put and EEPROM.get.

3

Thank you, how EEPROM is splitting it?

4

Why care? A float is 4 bytes stored in sequence at the address specified.

5

I want to write a parser to do the same splitting for GPS coordinates.
That's the code from EEPROM:

template <class T> int EEPROM_writeAnything(int ee, const T& value)
{
    const byte* p = (const byte*)(const void*)&value;
    unsigned int i;
    for (i = 0; i < sizeof(value); i++)
          EEPROM.write(ee++, *p++);
    return i;
}

template <class T> int EEPROM_readAnything(int ee, T& value)
{
    byte* p = (byte*)(void*)&value;
    unsigned int i;
    for (i = 0; i < sizeof(value); i++)
          *p++ = EEPROM.read(ee++);
    return i;
}

Hot does it know the size when reading - it can be a short string as "Hello world" or it can be "really long string ..."

From example it says char[10], probably unlimited string is not supported.
Are you saying 4 bytes is enough to split any float value?

6

kapelan:
Are you saying 4 bytes is enough to split any float value?

A float is 4 bytes.