KonnektING library

[tuxedo]

First problem that I see: you defined not enough "virtual EEPROM"...

byte virtualEEPROM[16];

this was only for communication sketch demonstration... you need at least 180 bytes...

It's always a good idea to allocate approriate space for EEPROM. Makes no sense to just allocate 16 bytes, as the EEPROM is anyhow organized in pages that are bigger than 16 bytes. .
So just use 1k or 2k as default. SAMD has enough of it and 1k or 2k is far away from beeing "too much".

[Eugenius]

virtualEEPROM is only for communication sketch, that also works on 32u4 and 328p. So, it is not a good idea to allocate 1k or more