Embedded Systems LM5p-GSM, Product Manual

Page: 239 / 291

239
DMX handler script
Add the following resident script with sleep interval = 0, adjust port and channel as needed
1. if not dmxhandler then
2. require ( 'user.dmx' )
3. dmxhandler = DMX.init ({
4. port = '/dev/RS485' , -- RS-485 port name
5. channels = 8 ,
-- number of DMX channels to use
6. transition = 2 ,
-- soft transition time in seconds
7. })
8. end
9.
10. dmxhandler:run ()
Setter (used in other scripts)
DMX.set ( channel, value )
Mark DMX objects
Create objects with DMX tag, where last part of group address is DMX address (starting from 1).
Create event script mapped to DMX tag.
1. require ( 'user.dmx' )
2.
-- get ID as group address last part (x/y/ID)
3. id = tonumber ( event.dst:split ( '/' )[ 3 ])
4. -- get event value (1 byte scaling)
5. value = event.getvalue ()
6.
-- convert from [0..100] to [0..255]
7. value = math.floor ( value * 2.55 )
8.
-- set channel ID value
9. DMX.set ( id, value )
Predefined scene example
The following example should be placed inside a resident script. Sleep time defines scene keep
time (at least 1 second).
1. if not scenes then
2.
-- 3 channel scene
3. scenes = {
4. { 255, 0, 0 } ,
5. { 0, 255, 0 } ,
6. { 0, 0, 255 } ,
7. { 255, 255, 0 } ,
8. { 0, 255, 255 } ,
9. { 255, 0, 255 } ,
10. { 255, 255, 255 } ,