Store number over 1 byte in EEPROM

[frank0]

New to this, trying to store a persistent number between boots but it rolls over after 8 bits. Works as expected until I hit 256. Is each address only capable of holding a byte? How do I abstract that away to store larger numbers?

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#include <EEPROM.h>
#define EEPROM_SIZE 512

int numClick = 0;

in setup()

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EEPROM.begin(EEPROM_SIZE);
numClick = EEPROM.read(0);

in loop() on certain condition

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numClick = EEPROM.read(0);
........
numClick++;
........
EEPROM.write(0, numClick);
EEPROM.commit();

[ESP_Sprite]

Yeah, the EEPROM library emulates an actual EEPROM device which stores an array of bytes. If you want to store larger numbers, you'd need to split it into multiple bytes. A better option is to use the Preferences library, which is more flexible as it doesn't have to emulate a hardware device.

[lbernstone]

While I completely agree with Sprite that Preferences is preferred (haha), there are shorthand functions in the EEPROM library to make it easier to deal with larger numbers. You do still have to keep track of how many bytes you are using so you can read/write to the correct addresses. See the extra example

[frank0]

Thank you both for the info, all working well now with preferences instead