EEPROM Get

/***

    eeprom_get example.

    This shows how to use the EEPROM.get() method.

    To pre-set the EEPROM data, run the example sketch eeprom_put.

    This sketch will run without it, however, the values shown

    will be shown from what ever is already on the EEPROM.

    This may cause the serial object to print out a large string

    of garbage if there is no null character inside one of the strings

    loaded.

    Written by Christopher Andrews 2015

    Released under MIT licence.

***/

#include <EEPROM.h>

void setup() {

  float f = 0.00f;   //Variable to store data read from EEPROM.

  int eeAddress = 0; //EEPROM address to start reading from

  Serial.begin(9600);

  while (!Serial) {

    ; // wait for serial port to connect. Needed for native USB port only

  }

  Serial.print("Read float from EEPROM: ");

  //Get the float data from the EEPROM at position 'eeAddress'

  EEPROM.get(eeAddress, f);

  Serial.println(f, 3);    //This may print 'ovf, nan' if the data inside the EEPROM is not a valid float.

  /***

    As get also returns a reference to 'f', you can use it inline.

    E.g: Serial.print( EEPROM.get( eeAddress, f ) );

  ***/

  /***

    Get can be used with custom structures too.

    I have separated this into an extra function.

  ***/

  secondTest(); //Run the next test.
}

struct MyObject {

  float field1;

  byte field2;

  char name[10];
};

void secondTest() {

  int eeAddress = sizeof(float); //Move address to the next byte after float 'f'.

  MyObject customVar; //Variable to store custom object read from EEPROM.

  EEPROM.get(eeAddress, customVar);

  Serial.println("Read custom object from EEPROM: ");

  Serial.println(customVar.field1);

  Serial.println(customVar.field2);

  Serial.println(customVar.name);
}

void loop() {

  /* Empty loop */
}