The Arduino microcontrollers have non volatile EEPROM memory built in. The EEPROM library allows you to read and write those bytes. EEPROM Sizes: 1024 bytes ATmega328 512 bytes ATmega168 ATmega8 4KB (4096 bytes) ATmega1280 ATmega2560.  Using The Library Note that you read and write one byte at a time – there is not an array read and […]