# EEPROM factory values?

**URL:** <https://forum.arduino.cc/t/eeprom-factory-values/488225>\
**Category:** Programming\
**Created:** [October 28, 2017, 4:47pm UTC](https://forum.arduino.cc/t/eeprom-factory-values/488225 "2017-10-28T16:47:38Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![el\_supremo](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/el_supremo/32/214787_2.png) [@el\_supremo](https://forum.arduino.cc/u/el_supremo)\
**Post date:** [October 28, 2017, 4:50pm UTC](https://forum.arduino.cc/t/eeprom-factory-values/488225/2 "2017-10-28T16:50:00Z")

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An EEPROM will always read as all ones if it hasn't been programmed or has been erased. i.e. each byte will read as 0xFF = 255 (decimal).

Pete

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