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bettse / SIO.md
Last active April 29, 2025 22:54
iClass

SIO

If you've only got an SIO and you wonder what the length of the credential is, this information, experimentally derived and provided on Discord, may help.

SIO Payload Length PACS Minimum Size PACS Maximum Size
21 Bytes 25 bits 32 bits
22 Bytes 33 bits 40 bits
23 Bytes 41 bits 48 bits