pub const MAX_PASSCODE: u32 = 99_999_998;Expand description
Largest valid Matter setup passcode (Core Spec §5.1.7.1: the passcode SHALL
be in 1..=99_999_998). The QR/manual-code wire field is 27 bits wide, but
values in 99_999_999..=0x07FF_FFFF are not valid passcodes — every
spec-compliant commissioner (chip-tool, Apple/Google Home, …) rejects a
setup code that carries one.