pub const SCALING_FLAGS_DEFINED: u8 = _; // 243u8Expand description
The flag bits that carry meaning.
Bits 2 and 3 have no meaning and are excluded: they are not reliably zero on the wire, because firmware that does not initialise the configuration it broadcasts builds this frame from an uninitialised stack local and ORs its flags onto whatever was there. The same is true of every bit here on such a sender, which is why each reading below says what it rests on.