Help example on simple light controll, lux

[Joep]

Try this

Code:

lux = grp.getvalue('1/1/1')
setpoint = grp.getvalue('1/1/2')
output = '1/1/3'
hysteresis = 20 --in %

 
Limit_ON = setpoint - ((hysteresis/100)*setpoint)
Limit_OFF = setpoint + ((hysteresis/100)*setpoint)
 
if (lux >= Limit_OFF) then
   grp.checkwrite(output, false)
elseif  (lux <= Limit_ON) then
     grp.checkwrite(output, true)
end

I would like to replace the hysteresis from this script for a time period. So let's say i want an hysteresis for 30 minutes how can this be done?