Button dimming (8-bit value)

[Daniel]

Hi
You can do it as fallow.
Create 4 bit dim object 3.007 and let all parameters as default.
Create event based script on this object and use this script.

Code:

step = 10    --dimming step
stepTime = 0.5  --- dimming interval
ballastAddress = 1  
gatewayID='internal'

-----------------------------------------------------------------------------------------------------

valuein = event.getvalue()

require('user.dali')

   res, err = dalicmd(gatewayID, 'queryactual', { addrtype = 'short', address = ballastAddress })
 -- read ok
        if res then
     status = res:byte()
        end

while( valuein==11 ) do
 status = status + step
    if (status >254) then
             dalicmd(gatewayID, 'arc', { addrtype = 'short', address = ballastAddress, value = 254})
         else
     dalicmd(gatewayID, 'arc', { addrtype = 'short', address = ballastAddress, value = status})
    end
 valuein = grp.getvalue(event.dst)
 os.sleep(stepTime)
end
   

while( valuein==3 ) do
 status = status - step
     if (status <0) then
         dalicmd(gatewayID, 'arc', { addrtype = 'short', address = ballastAddress, value = 0})
         else
       dalicmd(gatewayID, 'arc', { addrtype = 'short', address = ballastAddress, value = status})
     end  
 valuein = grp.getvalue(event.dst)
 os.sleep(stepTime)
end

Modify parameters
Add this object on to visu and test.
Should work :
Dalli arc is logarithmic curve so you will have slower dim on low values and fast on bigger.

BR