LINKTYPE_WATTSTOPPER_DLM
Packet structure
+-------------------------+ | Dongle Code | | (1 Octet) | +-------------------------+ | Packet Delay | | (2 Octets) | +-------------------------+ | Preamble 1 | | (1 Octet | +-------------------------+ | Preamble 2 | | (1 Octet) | +-------------------------+ | Family/Address/IR | | (1 Octet) | +-------------------------+ | Payload | . . . . . . | (N Octets) | +-------------------------+
Description
The WattStopper Digital Lighting Management (DLM) and Legrand Nitoo Open protocol share common packet structure, and are used in the lighting control industry.
The Dongle Code field contains a value that is one of:
- 0="No Error",
- 1="Preamble 1 Error",
- 2="Preamble 2 Error",
- 3="Checksum Error",
- 4="Timeout Error",
- 8="Other Family Error"
The Packet Delay field contains an integer value that is the number of milliseconds since the previous packet, in network byte order.
The Preamble 1 and Preamble 2 fields should each contain 0xAA
.
The Family/Address/IR field contains 3-bits of family code, 2-bits of address mode, 2-bits of IR (infrared) routing, and 1-bit unused. The 8 Legrand NITOO families are
000
=CAD Filaire001
=TopDog010
=CAD RF011
=CAD PLC100
=CAD IR101
=DLM110
=none111
=Escape/DLM Bootloader
The Address mode bits are defined as
00
=Broadcast01
=multicast10
=unicast11
=anonymous unicast
The Payload varies depending on the Family.