Art-Net DMX

[sjfp]

Here's a simplified function. Change universe number as needed, sequence and physical parameters can probably be zero. Value is the output channel value ranging from 0 to 255.

Code:

function artnet_dmx(ip, sequence, physical, universe, data)  local cmd = string.char(    -- null byte    0,    -- ARTNET_DMX opcope    0, 0x50,    -- protocol version 14    0, 14,    -- sequence number is used to ensure that ArtDmx packets are used in the correct order    bit.band(sequence, 0xFF),    -- physical input port from which DMX512 data was input.    bit.band(physical, 0xFF),    -- 15 bit Port-Address (universe)    bit.band(universe, 0xFF), bit.rshift(universe, 8),    -- Length    bit.rshift(#data, 8), bit.band(#data, 0xFF)  )  local req = "Art-Net" .. cmd .. string.char(unpack(data))  local sck = require("socket").udp()  sck:sendto(req, ip, 0x1936)  sck:close() end ip = '192.168.2.43' universe = 123 value = 255 artnet_dmx(ip, 0, 0, universe, { value })

Many thanks for the details. Works great. What do I need to change to control each DMX 512 Channels

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Here's a simplified function. Change universe number as needed, sequence and physical parameters can probably be zero. Value is the output channel value ranging from 0 to 255.

Code:

function artnet_dmx(ip, sequence, physical, universe, data)  local cmd = string.char(    -- null byte    0,    -- ARTNET_DMX opcope    0, 0x50,    -- protocol version 14    0, 14,    -- sequence number is used to ensure that ArtDmx packets are used in the correct order    bit.band(sequence, 0xFF),    -- physical input port from which DMX512 data was input.    bit.band(physical, 0xFF),    -- 15 bit Port-Address (universe)    bit.band(universe, 0xFF), bit.rshift(universe, 8),    -- Length    bit.rshift(#data, 8), bit.band(#data, 0xFF)  )  local req = "Art-Net" .. cmd .. string.char(unpack(data))  local sck = require("socket").udp()  sck:sendto(req, ip, 0x1936)  sck:close() end ip = '192.168.2.43' universe = 123 value = 255 artnet_dmx(ip, 0, 0, universe, { value })

Many thanks for the details. Works great. What do I need to change to control each DMX 512 Channels

Found how. {value1,value2,value3) 1= Ch1 2=Ch2 3=Ch3 etc etc.
But how can I can change channels independently without affecting other channels that may of been set