Data Types

Each RSCP data item carries a 1-byte type identifier that determines how the value field is interpreted.

Type Table

Hex	Name	Size (bytes)	.NET Type	Notes
0x00	None	0	—	Request tag, no value
0x01	Bool	1	bool	0 = false, non-zero = true
0x02	Char8	1	sbyte	Signed 8-bit
0x03	UChar8	1	byte	Unsigned 8-bit
0x04	Int16	2	short	Little-endian
0x05	UInt16	2	ushort	Little-endian
0x06	Int32	4	int	Little-endian
0x07	UInt32	4	uint	Little-endian
0x08	Int64	8	long	Little-endian
0x09	UInt64	8	ulong	Little-endian
0x0A	Float32	4	float	IEEE 754
0x0B	Double64	8	double	IEEE 754
0x0C	Bitfield	1	byte	Bit flags
0x0D	CString	Variable	string	UTF-8 encoded
0x0E	Container	Variable	RscpDataItem[]	Nested data items
0x0F	Timestamp	12	DateTimeOffset	See below
0x10	ByteArray	Variable	byte[]	Raw binary
0xFF	Error	Variable	—	Error response

Special Types

Container (0x0E)

A container's value field holds one or more nested data items, each with their own Tag-Type-Length-Value header. Containers are used for grouping related tags (e.g., authentication request contains user + password).

Timestamp (0x0F)

12 bytes total:

• Bytes 0-7: Unix seconds since epoch (int64 LE)
• Bytes 8-11: Nanoseconds within the second (int32 LE)

Error (0xFF)

Returned when a tag request fails. Known error codes:

Value	Meaning
0x01	NOT_HANDLED
0x02	ACCESS_DENIED
0x03	FORMAT
0x04	AGAIN
0x05	OUT_OF_BOUNDS
0x06	NOT_AVAILABLE
0x07	UNKNOWN_TAG
0x08	ALREADY_IN_USE