DMX Speed

[DGrandes]

Hi,

I´m working with DMX lighting of a bridge and I have some problems with the final solution.

They want to do some animations with lights and speedo of DMX not work fine, I don´t know if the problem is Logic Machine Script or DMX lights.

An example:

I have 52 RGBW lights and I want to write  a color individually in each light. 

Code:

for i = 1, 52, 1 do
    grp.update(dir[i], color)
    os.sleep(time)
end

It i put 1 in time, it work perfectly, but with 500ms, it write in 2 lights at once,with 250ms, it write in 4 lights at once.... 
I think there is a limitation in the communication of 1 second.

Default params:

Code:

local defaults = {
  -- storage key
  skey = 'dmx_line_1',
  -- RS-485 port
  port = '/dev/RS485-2',
  -- number of calls per second
  resolution = 20,    -- default 20
  -- total number of channels to use
  channels = 256,
  -- transition time in seconds, does not include DMX transfer time
  transition = 1,
}

I tried to change resolution in params to 200 but doesn´t work, it works worse.

Any ideas?

Thanks!

[admin]

The library reads values once a second. If you want some custom animation you should use the DMX library directly without using groups in between.

[Punchito]

The library reads values once a second. If you want some custom animation you should use the DMX library directly without using groups in between.

 
Could you give an example?

[Daniel]

https://openrb.com/example-dmx-lighting-...-with-lm2/

[Punchito]

https://openrb.com/example-dmx-lighting-...-with-lm2/

In this example, changes occur once per second, I need it faster.
How can I implement this?

[admin]

You need to use low-level library functions. Resident script example for 2 channels:

Code:

dmx = require('luadmx').open('/dev/RS485-1')
dmx:setcount(2)

function send(val)
  dmx:setchannel(1, val)
  dmx:setchannel(2, 255 - val)

  dmx:send()

  os.sleep(0.1)
end

while true do
  for val = 0, 255, 5 do
    send(val)
  end

  for val = 250, 5, -5 do
    send(val)
  end
end