Need some help from the experts please.
I need to store a very long cell number between deep sleep intervals, but it seems
i will have to use a string to do it but are unsure how to do it.
for ex 279999999999999999 - actual length of number.
I tried a few options but the number is longer than any integer type i could find and
could not find an example where a string is used to read and write to and EEPROM
Thanks in advance