arduino How to store variables in EEPROM and use them for permanent storage
Syntax
- EEPROM.write(address, value); //(Store variables in EEPROM in a particular address)
- EEPROM.read(address); //(Retrieve values from EEPROM and read data stored in EEPROM)
Parameters
| Parameters of EEPROM.write | Detail |
|---|---|
| address | The address where value is to be stored in EEPROM |
| value | Main variable to store in EEPROM. Note that this is a uint_8 (single byte)—you must split multiple-byte data types into single bytes yourself. Or you can use EEPROM.put to store floats or other data types. |
| Parameters of EEPROM.Read | Detail |
| address | The address from which the variable is to be read |
Remarks
The allowable addresses vary by hardware.
- ATMega328 (Uno, Pro Mini, etc.): 0–1023
- ATMega168: 0-511
- ATMega1280: 0-4095
- ATMega2560: 0-4095
