Device

All data messages are addressed to a device. A device is always related to (owned by) a node. A full device address consists of <node> <device>.
<Device> is one byte.
Note that devices can both be physical boxes (e.g. RIO) or a function (Router).

Value (decimal)	Value (Hex)	Device Function
0	0x00	Invalid device (reserved NULL value)
1 - 64	0x01 - 0x40	External boxes. RIOs, PCs etc.