Netlinx Protocol

Connection Parameters

Protocol	TCP
Netlinx server port	1234
Line delimiter	b'\n' (or 0x0A)

Message Format

Each message should begin with < and end with >:

'<TALLY.PGM:1=0>'

All characters outside of the opening and closing brackets are to be ignored by both the client and the server.

Message Parameters

Identifier	Name	Type	Description
n	Integer	Item index	The item index (zero-based)
v	Value	Integer	The item value. If boolean, 0 = off, 1 = on
t	Time	Integer	Duration in milliseconds

Command / Query Messages

Request	Response	Description
PING?	PONG	Check communication status
TALLY.PGM?	TALLY.PGM:n=v	Request all program tally status. Responses are separated by line breaks.
TALLY.PVW?	TALLY.PVW:n=v	Request all preview tally status. Responses are separated by line breaks.
TALLY.PGM:n?	TALLY.PGM:n=v	Request a single program tally status
UPDATE.TIME=t	UPDATE.TIME=t	Set timeout for update messages
UPDATE.UNSOLICITED=v	UPDATE.UNSOLICITED=v	Turn unsolicited updates on or off

Status Update Messages

Message	Description
TALLY.PGM:n=v	Sent on changes for program tally. Automatically sent if unsolicited updates are on.
TALLY.PVW:n=v	Sent on changes for program tally. Automatically sent if unsolicited updates are on.