Art-Net DMX

[lcrowhurst]

You can run the sending script on the same device. Just set IP to 127.0.0.1

Thanks that works perfectly, now to get an art net to dmx converter to test with. Once again thank you so much for your help

[lcrowhurst]

I finally installed at the clients site, Using an Enttec DMX to Artnet. The script works well for presets , ie setting dmx 1 to 255, however if a slider is used eg sliding up from 0 to 255, where eg value 1,5,7,10,14 etc are sent out, the shac(LM) has trouble keeping up with all the packets of data being sent. This results in at first the light matching the slider but very quickly it starts lagging, so by the time the slider reaches 255, it may be a few second before the shac(LM) changes the light level to 255. Is there any way of speeding up the script?

[tomnord]

An example of Art-Net receiver. It ignores sequence and universe numbers which are not needed for general use. Edit mapping table to select which groups addresses are mapped to DMX channel numbers starting from 1. Output value for each channel is 1 byte (0..255).

Code:

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if not server then   mapping = {     [1] = '32/1/1',     [2] = '32/1/2',     [3] = '32/1/3',   }   server = require('socket').udp()   server:settimeout(1)   server:setsockname('*', 0x1936)   header = 'Art-Net' .. string.char(0, 0, 0x50)   values = {}   function parse(data)     local count, value     if data:sub(1, #header) ~= header then       return     end     count = #data - 18     for i = 1, count do       value = data:byte(i + 18)       if value ~= values[ i ] then         values[ i ] = value         if mapping[ i ] then           grp.update(mapping[ i ], value)         end       end     end   end end data = server:receive() if data then   parse(data) end

Regarding this. Is there any way to have the LM separate commands based on Universe? My client  want's to use universe 3 on art-net to control KNX lights on/off and value dim. Universe 1 and 2 are used for stagelights.

[admin]

Try this:

Code:

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if not server then   mapping = {     [1] = '32/1/1',     [2] = '32/1/2',     [3] = '32/1/3',   }   server = require('socket').udp()   server:settimeout(1)   server:setsockname('*', 0x1936)   header = 'Art-Net' .. string.char(0, 0, 0x50)   values = {}   function parse(data)     local count, value     if #data < 19 or data:sub(1, #header) ~= header then       return     end     local univlo, univhi = data:byte(15, 16)     local universe = univhi * 256 + univlo     if universe ~= 3 then       return     end     count = #data - 18     for i = 1, count do       value = data:byte(i + 18)       if value ~= values[ i ] then         values[ i ] = value         if mapping[ i ] then           grp.update(mapping[ i ], value)         end       end     end   end end data = server:receive() if data then   parse(data) end

[tomnord]

Try this:

Code:

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if not server then   mapping = {     [1] = '32/1/1',     [2] = '32/1/2',     [3] = '32/1/3',   }   server = require('socket').udp()   server:settimeout(1)   server:setsockname('*', 0x1936)   header = 'Art-Net' .. string.char(0, 0, 0x50)   values = {}   function parse(data)     local count, value     if #data < 19 or data:sub(1, #header) ~= header then       return     end     local univlo, univhi = data:byte(15, 16)     local universe = univhi * 256 + univlo     if universe ~= 3 then       return     end     count = #data - 18     for i = 1, count do       value = data:byte(i + 18)       if value ~= values[ i ] then         values[ i ] = value         if mapping[ i ] then           grp.update(mapping[ i ], value)         end       end     end   end end data = server:receive() if data then   parse(data) end

When logging the "server" variable i get this status: udp{unconnected}: 0xb6e42ac0

[admin]

This is correct, UDP server cannot be in a connected state, only UDP client can.
Consider changing grp.update() to grp.checkupdate().

[tomnord]

This is correct, UDP server cannot be in a connected state, only UDP client can.
Consider changing grp.update() to grp.checkupdate().

I still do not get any values. Is there any other diagnostics I can add?
the variable "data" returns NIL

[admin]

You should check the sending side settings.